{"id":66895,"date":"2026-08-26T04:41:34","date_gmt":"2026-08-25T19:41:34","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=66895"},"modified":"2026-08-26T04:41:34","modified_gmt":"2026-08-25T19:41:34","slug":"kun-taikaneste-muuttuu-peiliksi-hopeapeilireaktion-kauneus-ja-rajahtava-vaara","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=66895&lang=fi","title":{"rendered":"Kun taikaneste muuttuu peiliksi! Hopeapeilireaktion kauneus ja &#8220;r\u00e4j\u00e4ht\u00e4v\u00e4&#8221; vaara"},"content":{"rendered":"<p style=\"text-align: center;\"><span style=\"color: #339966;\"><strong>Olen Science Trainer Ken Kuwako. Jokainen p\u00e4iv\u00e4 on kokeilup\u00e4iv\u00e4.<\/strong><\/span><\/p>\n<p style=\"text-align: left;\">Kuvittele l\u00e4pin\u00e4kyv\u00e4 neste, joka muuttuu silm\u00e4nr\u00e4p\u00e4yksess\u00e4 hohtavaksi peiliksi. Oletko koskaan n\u00e4hnyt jotain n\u00e4in taianomaista? Tieteen maailmassa on kauniita kokeita, jotka n\u00e4ytt\u00e4v\u00e4t melkein alkemialta. Yksi tunnetuimmista on t\u00e4ss\u00e4 esitelt\u00e4v\u00e4 <b>hopeapeilireaktio<\/b>.<\/p>\n<p>Luonnontiedekerhon oppilaat olivat innokkaina pyyt\u00e4neet: \u201dHaluan kokeilla t\u00e4t\u00e4!\u201d Niinp\u00e4 valmistelimme kaiken huolellisesti laboratoriossa ja ryhdyimme kokeeseen. Lopputulos on todella upea, mutta kokeessa k\u00e4ytet\u00e4\u00e4n my\u00f6s <b>voimakkaita kemikaaleja<\/b>, ja v\u00e4\u00e4rin k\u00e4siteltyn\u00e4 siihen liittyy jopa <b>r\u00e4j\u00e4hdysvaara<\/b>. T\u00e4ll\u00e4 kertaa p\u00e4\u00e4semme kurkistamaan t\u00e4m\u00e4n vaikuttavan ilmi\u00f6n taakse ja selvitt\u00e4m\u00e4\u00e4n, millaista h\u00e4mm\u00e4stytt\u00e4v\u00e4\u00e4 tiedett\u00e4 sen taustalla piilee.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59743 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.17.07.jpeg\" alt=\"\" width=\"356\" height=\"309\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.17.07.jpeg 650w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.17.07-300x260.jpeg 300w\" sizes=\"auto, (max-width: 356px) 100vw, 356px\" \/><\/p>\n<h3>Ennen koetta: \u201dT\u00e4m\u00e4 s\u00e4\u00e4nt\u00f6 on ehdoton\u201d<\/h3>\n<p>T\u00e4ss\u00e4 kokeessa k\u00e4ytet\u00e4\u00e4n esimerkiksi hopeanitraattia, natriumhydroksidia sek\u00e4 v\u00e4kev\u00e4\u00e4 ammoniakkivett\u00e4, jonka pist\u00e4v\u00e4 haju tuntuu heti nen\u00e4ss\u00e4. N\u00e4m\u00e4 kemikaalit ovat vaarallisia, joten kokeessa on aina oltava mukana opettaja tai muu p\u00e4tev\u00e4 aikuinen. Natriumhydroksidi voi vaurioittaa ihoa vakavasti, joten suojak\u00e4sineet, laboratoriotakki ja silmien suojaamiseen tarkoitetut suojalasit ovat ehdottoman v\u00e4ltt\u00e4m\u00e4tt\u00f6m\u00e4t.<\/p>\n<p>My\u00f6sk\u00e4\u00e4n kokeen j\u00e4lkeist\u00e4 siivousta ei saa koskaan j\u00e4tt\u00e4\u00e4 my\u00f6hemm\u00e4ksi. Jos j\u00e4tteit\u00e4 j\u00e4tet\u00e4\u00e4n seisomaan, niihin voi muodostua itsest\u00e4\u00e4n r\u00e4j\u00e4hdysherkki\u00e4 aineita, jotka voivat johtaa vakavaan onnettomuuteen (t\u00e4st\u00e4 lis\u00e4\u00e4 my\u00f6hemmin). Koulujen kulttuurifestivaaleilla on aiemmin sattunut t\u00e4llaisia onnettomuuksia, joten turvallisuudesta huolehtiminen on jopa itse koetta t\u00e4rke\u00e4mp\u00e4\u00e4.<\/p>\n<h3>[ Tarvikkeet ]<\/h3>\n<p>\u30fbHopeanitraatti 2 g \u30fbVett\u00e4 sopiva m\u00e4\u00e4r\u00e4 (18 g) \u30fbV\u00e4kev\u00e4\u00e4 ammoniakkivett\u00e4 (pieni m\u00e4\u00e4r\u00e4) \u30fbNatriumhydroksidia 1,44 g \u30fbGlukoosia 0,3 g \u30fbDekantterilasi, mittalieri\u00f6 ja elektroninen vaaka<\/p>\n<h3>[ Kokeen suorittaminen ]<\/h3>\n<p>Ennakkovalmistelu: Pese koeputki huolellisesti puhdistusliuoksella ennen kokeen aloittamista.<\/p>\n<p>\u2460 Sekoita 2 g hopeanitraattia ja 18 g vett\u00e4. N\u00e4in saat 20 g hopeanitraattiliuosta.<\/p>\n<p>\u2461 Lis\u00e4\u00e4 kohtaan \u2460 v\u00e4kev\u00e4\u00e4 ammoniakkivett\u00e4 tipoittain. Aluksi muodostuu ruskeaa sakkaa, mutta kun ammoniakkivett\u00e4 lis\u00e4t\u00e4\u00e4n edelleen, sakka liukenee ja liuos muuttuu j\u00e4lleen kirkkaaksi ja v\u00e4ritt\u00f6m\u00e4ksi.<\/p>\n<p>\u2462 Lis\u00e4\u00e4 kohtaan \u2461 6 ml liuosta, joka on valmistettu sekoittamalla 1,44 g natriumhydroksidia ja vett\u00e4. Liuos muuttuu t\u00e4ll\u00f6in tummanruskeaksi ja sameaksi.<\/p>\n<p>\u2463 Lis\u00e4\u00e4 t\u00e4m\u00e4n j\u00e4lkeen varovasti lis\u00e4\u00e4 v\u00e4kev\u00e4\u00e4 ammoniakkivett\u00e4, kunnes sakka on kokonaan kadonnut ja liuos muuttunut j\u00e4lleen kirkkaaksi. T\u00e4m\u00e4 on reaktion kannalta olennainen Tollensin reagenssi.<\/p>\n<p>\u2464 Valmista 3 g glukoosiliuosta sekoittamalla 0,3 g glukoosia ja 2,7 g vett\u00e4.<\/p>\n<p>\u2465 Sekoita kohdat \u2463 ja \u2464 ja kaada seos koeputkeen.<\/p>\n<p class=\"query-text-line ng-star-inserted\">Valmista tuli! Nyt koeputkea tarvitsee vain ravistaa noin 8 minuutin ajan. Pikkuhiljaa koeputken sis\u00e4pinta alkaa muuttua aivan peilin kaltaiseksi.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59741\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.53.jpeg\" alt=\"\" width=\"351\" height=\"422\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.53.jpeg 584w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.53-250x300.jpeg 250w\" sizes=\"auto, (max-width: 351px) 100vw, 351px\" \/><\/p>\n<p><iframe loading=\"lazy\" title=\"\u9b54\u6cd5\u306e\u6db2\u4f53\u304c\u93e1\u306b\u5909\u308f\u308b\uff01\u9280\u93e1\u53cd\u5fdc\u306e\u7f8e\u3057\u3055\" width=\"1140\" height=\"641\" src=\"https:\/\/www.youtube.com\/embed\/vo90WBgSAso?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>T\u00e4ll\u00e4 kertaa halusimme yll\u00e4tt\u00e4\u00e4 oppilaat ja kokeilimme samaa my\u00f6s valtavalla py\u00f6re\u00e4pohjaisella kolvilla. T\u00e4ss\u00e4 lopputulos.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59742 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.59.jpeg\" alt=\"\" width=\"326\" height=\"433\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.59.jpeg 514w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.59-226x300.jpeg 226w\" sizes=\"auto, (max-width: 326px) 100vw, 326px\" \/><\/p>\n<p>Lopputulos oli niin upea, ett\u00e4 luonnontiedeluokka t\u00e4yttyi ihastuneista huudahduksista!<\/p>\n<h3>Miten kemiallinen reaktio toimii?<\/h3>\n<p>Miten ihmeess\u00e4 tavallisesta nesteest\u00e4 voi synty\u00e4 peili? T\u00e4m\u00e4n ilmi\u00f6n p\u00e4\u00e4roolissa on makea sokerin sukulainen, glukoosi.<\/p>\n<p>Glukoosimolekyyliss\u00e4 on aldehydiryhm\u00e4 (-CHO). Se toimii pelkistimen\u00e4: glukoosi hapettuu itse samalla, kun se pelkist\u00e4\u00e4 toista ainetta. Liuoksessa hopeaionit esiintyv\u00e4t \u201dkompleksi-ionien\u201d muodossa. Kun ne vastaanottavat elektroneja glukoosilta, ne pelkistyv\u00e4t takaisin metalliseksi hopeaksi.<\/p>\n<p><b>Kemiallinen reaktioyht\u00e4l\u00f6<\/b><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59737 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-4.51.24.jpeg\" alt=\"\" width=\"829\" height=\"57\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-4.51.24.jpeg 1362w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-4.51.24-300x21.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-4.51.24-1024x71.jpeg 1024w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-4.51.24-768x53.jpeg 768w\" sizes=\"auto, (max-width: 829px) 100vw, 829px\" \/><\/p>\n<p>\u203b Vesiliuoksessa vain pieni osa glukoosista esiintyy avoketjuisessa muodossa. T\u00e4m\u00e4n rakenteen p\u00e4\u00e4ss\u00e4 on aldehydiryhm\u00e4, mink\u00e4 vuoksi glukoosiliuos osoittaa pelkist\u00e4vi\u00e4 ominaisuuksia. Vesiliuoksessa aldehydiryhm\u00e4n sis\u00e4lt\u00e4vi\u00e4 monosakkarideja kutsutaan aldooseiksi. L\u00e4hde: <a href=\"https:\/\/ja.wikipedia.org\/wiki\/\u30b0\u30eb\u30b3\u30fc\u30b9\">Wikipedia<\/a><\/p>\n<p>\u203b Aldehydit ovat orgaanisia yhdisteit\u00e4, joiden molekyyliss\u00e4 on formyyliryhm\u00e4 <span class=\"mwe-math-element mwe-math-element-inline\"><img decoding=\"async\" class=\"mwe-math-fallback-image-inline mw-invert skin-invert\" src=\"https:\/\/wikimedia.org\/api\/rest_v1\/media\/math\/render\/svg\/d9949176318b4a2ab8ba0b1199b85e77e5d15447\" alt=\"{\\displaystyle {{-}\\mathrm {C} ({=}\\mathrm {O} ){-}\\mathrm {H} }}\" aria-hidden=\"true\" \/><\/span>. Koska ne koostuvat formyyliryhm\u00e4st\u00e4 ja jostakin muusta ryhm\u00e4st\u00e4 ( <span class=\"mwe-math-element mwe-math-element-inline\"><img decoding=\"async\" class=\"mwe-math-fallback-image-inline mw-invert skin-invert\" src=\"https:\/\/wikimedia.org\/api\/rest_v1\/media\/math\/render\/svg\/605c2359a472e43cdaeece289f0d9cfd3ad5f187\" alt=\"{\\displaystyle {{-}\\mathrm {R} }}\" aria-hidden=\"true\" \/><\/span> ), niiden yleinen rakennekaava voidaan esitt\u00e4\u00e4 muodossa <span class=\"mwe-math-element mwe-math-element-inline\"><img decoding=\"async\" class=\"mwe-math-fallback-image-inline mw-invert skin-invert\" src=\"https:\/\/wikimedia.org\/api\/rest_v1\/media\/math\/render\/svg\/a9b9d51d79a7fb685717358eafeb5677badbcbf5\" alt=\"{\\displaystyle {\\mathrm {R} {-}\\mathrm {CHO} }}\" aria-hidden=\"true\" \/><\/span>. L\u00e4hde: <a href=\"https:\/\/ja.wikipedia.org\/wiki\/\u30a2\u30eb\u30c7\u30d2\u30c9\">Wikipedia<\/a><\/p>\n<p><b>Pelkistyminen:<\/b> Hopeaioni vastaanottaa elektroneja ja muuttuu kiilt\u00e4v\u00e4ksi metalliseksi <b>hopeaksi (Ag)<\/b>.<\/p>\n<p><b>Hapettuminen:<\/b> Glukoosi luovuttaa elektroneja ja muuttuu <b>glukonaatti-ioniksi<\/b>.<\/p>\n<h3>Miksi hopea \u201dtarttuu\u201d lasiin?<\/h3>\n<p>T\u00e4ss\u00e4 piilee yksi tieteen hauskimmista puolista! Jos hopea vain muodostuisi liuokseen, lopputuloksena olisi l\u00e4hinn\u00e4 mustuva neste. Mutta miksi hopea muodostaa lasin pinnalle kauniin, yhten\u00e4isen \u201dkalvon\u201d?<\/p>\n<p>\u2460 Nukleaation eli ytimien muodostuminen<br \/>\nLasin pinnalla on mikroskooppisen pieni\u00e4 ep\u00e4tasaisuuksia sek\u00e4 kemiallisia sitoutumiskohtia, kuten -OH-ryhmi\u00e4. Vastasyntyneet hopeaatomit l\u00f6yt\u00e4v\u00e4t lasin pinnalta t\u00e4llaisia \u201dkiintopisteit\u00e4\u201d, joihin ne voivat tarttua. Se on niille vakaampi paikka kuin vapaana liuoksessa kelluminen.<\/p>\n<p>\u2461 Tasainen ja hidas saostuminen<br \/>\nKokeen onnistumisen kannalta ratkaisevaa on se, ett\u00e4 hopeaa muodostuu v\u00e4hitellen, atomi atomilta.<\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59746\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.30.38.jpeg\" alt=\"\" width=\"247\" height=\"265\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.30.38.jpeg 528w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.30.38-280x300.jpeg 280w\" sizes=\"auto, (max-width: 247px) 100vw, 247px\" \/><\/p>\n<p style=\"text-align: center;\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59747\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.30.49.jpeg\" alt=\"\" width=\"268\" height=\"192\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.30.49.jpeg 842w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.30.49-300x215.jpeg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.30.49-768x551.jpeg 768w\" sizes=\"auto, (max-width: 268px) 100vw, 268px\" \/><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59748 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.31.02.jpeg\" alt=\"\" width=\"205\" height=\"192\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.31.02.jpeg 648w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.31.02-300x281.jpeg 300w\" sizes=\"auto, (max-width: 205px) 100vw, 205px\" \/><\/p>\n<p>Jos reaktio olisi liian nopea, hopeaatomit takertuisivat toisiinsa jo liuoksessa ja muodostaisivat vain tavallista \u201dhopeajauheen\u201d sakkaa. Ammoniakin avulla reaktion nopeutta voidaan hillit\u00e4 sopivasti. N\u00e4in hopeaatomit ehtiv\u00e4t j\u00e4rjesty\u00e4 v\u00e4hitellen pinnalle ja muodostaa tasaisen, aukottoman <b>peilin<\/b>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59742 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.59.jpeg\" alt=\"\" width=\"179\" height=\"238\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.59.jpeg 514w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.16.59-226x300.jpeg 226w\" sizes=\"auto, (max-width: 179px) 100vw, 179px\" \/><\/p>\n<p>Siksi koeputki piti pest\u00e4 erityisen huolellisesti ennen koetta. Jos lasin pinnalla on likaa tai rasvaa, hopeaatomit eiv\u00e4t l\u00f6yd\u00e4 sopivia ensimm\u00e4isi\u00e4 tarttumiskohtia, eiv\u00e4tk\u00e4 ne p\u00e4\u00e4se kiinnittym\u00e4\u00e4n lasiin kauniisti ja tasaisesti.<\/p>\n<h3>J\u00e4tteiden k\u00e4sittelyn t\u00e4rkeys: \u00e4l\u00e4 koskaan j\u00e4t\u00e4 liuosta seisomaan!<\/h3>\n<p>Kun hopeapeilireaktio on p\u00e4\u00e4ttynyt, seuraavat k\u00e4sittelytoimet on teht\u00e4v\u00e4 <b>v\u00e4litt\u00f6m\u00e4sti<\/b>.<\/p>\n<p>Saostaminen suolahapolla (HCl): Lis\u00e4\u00e4 j\u00e4\u00e4nn\u00f6sliuokseen suolahappoa. T\u00e4ll\u00f6in liuoksessa olevat hopeaionit muodostavat hopeakloridia (AgCl), joka saostuu valkoisena. Lis\u00e4\u00e4 suolahappoa, kunnes liuos on selv\u00e4sti hapan. N\u00e4in estet\u00e4\u00e4n vaarallisten ja r\u00e4j\u00e4hdysherkkien yhdisteiden muodostuminen. Syntynyt hopeakloridisakka tulee ker\u00e4t\u00e4 asianmukaisesti \u201draskasmetallij\u00e4tteen\u00e4\u201d.<\/p>\n<p><span style=\"font-size: 14px;\">Jos ammoniakkipitoinen hopeanitraattiliuos j\u00e4tet\u00e4\u00e4n seisomaan, siihen voi muodostua <\/span>\u201dukkoshopeaksi\u201d (raigin)<span style=\"font-size: 14px;\"> kutsuttu musta sakka.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-59739 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.04.19.jpeg\" alt=\"\" width=\"474\" height=\"53\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.04.19.jpeg 716w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/01\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-01-31-5.04.19-300x34.jpeg 300w\" sizes=\"auto, (max-width: 474px) 100vw, 474px\" \/><\/p>\n<p>Ukkoshopea sis\u00e4lt\u00e4\u00e4 p\u00e4\u00e4asiassa hopeanitridi\u00e4 (Ag3N) ja muita yhdisteit\u00e4, ja se on <b>eritt\u00e4in r\u00e4j\u00e4hdysherkk\u00e4\u00e4<\/b>. Kuivuminen tai jopa pieni t\u00e4rin\u00e4 tai isku voi saada sen r\u00e4j\u00e4ht\u00e4m\u00e4\u00e4n. Koulujen kulttuurifestivaaleilla onkin aiemmin sattunut vakavia onnettomuuksia. \u2192 <a href=\"https:\/\/web.archive.org\/web\/20060515012438\/http:\/\/www.ka.shibaura-it.ac.jp\/jiko-h\/jikohoukoku.htm\">Tutkimusraportti \u201dDekantterilasin r\u00e4j\u00e4hdys kulttuurifestivaalilla\u201d -onnettomuudesta<\/a><\/p>\n<p>Hopea on lis\u00e4ksi raskasmetalli, joten sen ymp\u00e4rist\u00f6vaikutukset voivat olla merkitt\u00e4vi\u00e4. Se on aina ker\u00e4tt\u00e4v\u00e4 asianmukaisesti ja paikallisten ohjeiden mukaisesti. Tieteen kauneus p\u00e4\u00e4see todella esiin vasta silloin, kun sen rinnalla kulkevat oikea tieto ja huolellinen turvallisuusajattelu.<\/p>\n<h3>Yhteydenotot ja yhteisty\u00f6pyynn\u00f6t<\/h3>\n<p>Tuodaan tieteen ihmeet ja hauskuus l\u00e4hemm\u00e4s arkea! Sivustolla esitell\u00e4\u00e4n helposti ymm\u00e4rrett\u00e4v\u00e4ll\u00e4 tavalla hauskoja kotona teht\u00e4vi\u00e4 tiedekokeita ja niiden niksej\u00e4. Tutustu sivustoon ja kokeile etsi\u00e4 lis\u00e4\u00e4 kiinnostavia aiheita!<br \/>\n\u30fb\u79d1\u5b66\u306e\u30cd\u30bf\u5e33-sivuston sis\u00e4lt\u00f6 on julkaistu my\u00f6s kirjana. Lis\u00e4tietoja <a href=\"https:\/\/amzn.to\/42PMCEL\">t\u00e4\u00e4ll\u00e4<\/a><br \/>\n\u30fbLis\u00e4tietoja sivuston yll\u00e4pit\u00e4j\u00e4st\u00e4 Ken Kuwakosta <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=37\">t\u00e4\u00e4ll\u00e4<\/a><br \/>\n\u30fbErilaiset yhteisty\u00f6- ja ty\u00f6pyynn\u00f6t (kirjoittaminen, luennot, tiedekerhot, tiedekokeiden ohjaus, TV-ohjelmien tieteellinen valvonta ja esiintyminen jne.) <a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">t\u00e4\u00e4ll\u00e4<\/a><br \/>\n<span class=\"s2\">\u30fbArtikkelien uusista p\u00e4ivityksist\u00e4 ilmoitetaan <a href=\"https:\/\/x.com\/kuwako\">X-palvelussa<\/a>!<\/span><\/p>\n<p style=\"text-align: center;\"><a href=\"https:\/\/www.youtube.com\/user\/kkuwako\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-35048\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2020\/03\/3d9640dad7bc5538e76f92da1966ee19.jpg\" alt=\"\" width=\"30\" height=\"21\" \/><\/a><a href=\"https:\/\/www.youtube.com\/user\/kkuwako?sub_confirmation=1\">\u79d1\u5b66\u306e\u30cd\u30bf\u30c1\u30e3\u30f3\u30cd\u30eb<\/a> -kanavalla julkaistaan tiedekokeisiin liittyvi\u00e4 videoita!<\/p>\n<h3><span style=\"color: #ff0000;\">NEW\u3000\u5206\u89e3\u554f\u984c\u96c6\u3000\u7406\u79d1<\/span><\/h3>\r\n<ul>\r\n \t<li>\uff17\u6708\uff12\uff11\u65e5\u767a\u58f2\uff01\u300e<a href=\"https:\/\/phys-edu.net\/wp\/?p=64462\">\u9ad8\u6821\u5165\u8a66 \u5206\u89e3\u554f\u984c\u96c6 \u7406\u79d1<\/a>\u300f\uff08\u5b66\u7814\uff09\u2026\u96e3\u3057\u3044\u554f\u984c\u3082\u5c0f\u3055\u306a\u554f\u984c\u306b\u5206\u89e3\u3059\u308b\u3053\u3068\u3067\u3001\u554f\u984c\u3092\u89e3\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u305d\u3093\u306a\u5206\u89e3\u306e\u6280\u8853\u304c\u8eab\u306b\u3064\u304f\u3088\u3046\u306b\u6df1\u304f\u95a2\u308f\u308a\u3092\u6301\u3063\u3066\u4f5c\u308a\u307e\u3057\u305f\u3002\r\n<a href=\"https:\/\/phys-edu.net\/wp\/?p=64462\"><img class=\"alignnone  wp-image-65097 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/07\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-07-04-8.40.17.jpeg\" alt=\"\" width=\"172\" height=\"244\" \/><\/a><\/li>\r\n<\/ul>\r\n<h3>\uff17\u30fb\uff18\u6708\u306e\u30a4\u30c1\u30aa\u30b7\u5b9f\u9a13\uff01<\/h3>\r\n<p style=\"text-align: center;\">\u590f\u3067\u30d7\u30b7\u30e5\u30c3\u3068\u723d\u3084\u304b\u5b9f\u9a13\uff01<\/p>\r\n<img class=\"alignnone  wp-image-64964 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2026\/06\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2026-06-30-4.31.58.jpeg\" alt=\"\" width=\"250\" height=\"310\" \/>\r\n<p style=\"text-align: center;\"><a href=\"https:\/\/phys-edu.net\/wp\/?p=206\">\u5c0f\u578b\u3067\u6301\u3061\u5e30\u308c\u308b\u3088\uff01\u30da\u30c3\u30c8\u30dc\u30c8\u30eb\u30ed\u30b1\u30c3\u30c8\u3092\u4f5c\u308d\u3046\uff01<\/a><\/p>\r\n\r\n<h3 style=\"text-align: left;\"><span style=\"font-size: medium;\"><b><strong>\u30c6\u30ec\u30d3\u756a\u7d44\u76e3\u4fee\u30fb\u30a4\u30d9\u30f3\u30c8\u7b49\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/span><\/h3>\r\n<ul>\r\n \t<li>\uff17\u6708\uff13\uff10\u65e5\uff08\u6c34\uff09\u79d1\u5b66\u76e3\u4fee\u300c<a href=\"https:\/\/www.fujitv.co.jp\/onesongfes\/\">TIF presents ONE SONG FES<\/a>\u300d\uff08\u30d5\u30b8\u30c6\u30ec\u30d3\uff09\u00a026:15~27:15<\/li>\r\n \t<li>12\u670826\u65e5\uff08\u571f\uff09\u3000<a href=\"https:\/\/phys-edu.net\/wp\/?p=64825\">\u30ca\u30ea\u30ab\u30b5\u30a4\u30a8\u30f3\u30b9\u30a2\u30ab\u30c7\u30df\u30fc\uff08\u6559\u54e1\u5411\u3051\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\uff09\u958b\u50ac<\/a><\/li>\r\n<\/ul>\r\n<h3><b>\u66f8\u7c4d<strong>\u306e\u304a\u77e5\u3089\u305b<\/strong><\/b><\/h3>\r\n<ul>\r\n \t<li>\u300e\u5927\u4eba\u306e\u305f\u3081\u306e\u9ad8\u6821\u7269\u7406\u5fa9\u7fd2\u5e33\u300f\uff08\u8b1b\u8ac7\u793e\uff09\u2026\u4e00\u822c\u5411\u3051\u306b\u65e5\u5e38\u306e\u7269\u7406\u306b\u3064\u3044\u3066\u516c\u5f0f\u3092\u5143\u306b\u7d10\u89e3\u304d\u307e\u3057\u305f\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=1827\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u3067\u306f\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<strong>\u203b\u5897\u5237\u304c\u304b\u304b\u308a\uff16\u5237\u3068\u306a\u308a\u307e\u3057\u305f\uff082026\/02\/01\uff09\r\n<img class=\"alignnone wp-image-10940 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg\" sizes=\"(max-width: 220px) 100vw, 220px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0-300x262.jpg 300w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2013\/12\/0811159a99f69eeff1a357e3daed84e0.jpg 311w\" alt=\"\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8 2014-07-05 0.43.51\" width=\"220\" height=\"192\" \/><\/strong><\/li>\r\n \t<li>\u300e\u304d\u3081\u308b!\u5171\u901a\u30c6\u30b9\u30c8 \u7269\u7406\u57fa\u790e \u6539\u8a02\u7248\u300f\uff08\u5b66\u7814\uff09\u2026\u3000\u9ad8\u6821\u7269\u7406\u306e\u53c2\u8003\u66f8\u3067\u3059\u3002\u30a4\u30e9\u30b9\u30c8\u3092\u591a\u304f\u3057\u3066\u30a4\u30e1\u30fc\u30b8\u304c\u6301\u3066\u308b\u3088\u3046\u306b\u63cf\u304d\u307e\u3057\u305f\u3002\u6388\u696d\u306b\u3064\u3044\u3066\u3044\u3051\u306a\u3044\u3001\u7269\u7406\u304c\u82e6\u624b\u3001\u305d\u3093\u306a\u751f\u5f92\u306b\u304a\u3059\u3059\u3081\u3067\u3059\u3002<a href=\"https:\/\/phys-edu.net\/wp\/?p=45322\">\u7279\u8a2d\u30b5\u30a4\u30c8<\/a>\u306f\u3053\u3061\u3089\u3002\r\n<img class=\"alignnone wp-image-45718 aligncenter\" src=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg\" sizes=\"(max-width: 184px) 100vw, 184px\" srcset=\"https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c.jpg 756w, https:\/\/phys-edu.net\/wp\/wp-content\/uploads\/2024\/04\/dc1da64a8c8d1422062b4867c0607a1c-300x269.jpg 300w\" alt=\"\" width=\"184\" height=\"165\" \/><\/li>\r\n<\/ul>\r\n<h3><span style=\"text-align: center;\">\u5404\u7a2eSNS\uff08\u66f4\u65b0\u60c5\u5831\u3092\u304a\u5c4a\u3051\uff01\uff09<\/span><\/h3>\r\n<p style=\"text-align: center;\">\u3010\u65e5\u672c\u8a9e\u3011<a style=\"text-align: center;\" href=\"https:\/\/twitter.com\/kuwako\">X(Twitter)<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.instagram.com\/science_seeds\/\">instagram<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.facebook.com\/kuwakolab\/\">Facebook<\/a>\u3000\u3010\u82f1\u8a9e\u3011<a style=\"text-align: center;\" href=\"https:\/\/bsky.app\/profile\/kagakunoneta.bsky.social\">BlueSky<\/a><span style=\"text-align: center;\">\uff0f<\/span><a style=\"text-align: center;\" href=\"https:\/\/www.threads.net\/@science_seeds?hl=ja\">Threads<\/a><\/p>\r\n\r\n<h3 style=\"text-align: center;\"><strong>Explore<\/strong><\/h3>\r\n<ul>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=30764\">\u697d\u3057\u3044\u5b9f\u9a13<\/a>\u2026\u304a\u5b50\u3055\u3093\u3068\u4e00\u7dd2\u306b\u5922\u4e2d\u306b\u306a\u308c\u308b\u30a4\u30c1\u30aa\u30b7\u306e\u79d1\u5b66\u5b9f\u9a13\u3092\u591a\u6570\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002\u307e\u305f\u3001\u9ad8\u6821\u7269\u7406\u306e\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306e\u52d5\u753b\u6559\u6750\u3082\u7528\u610f\u3057\u307e\u3057\u305f\u3002<\/li>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=798\">\u7406\u79d1\u306e\u6559\u6750<\/a>\u2026 \u7406\u79d1\u6559\u5e2b\u3092\u30d0\u30c3\u30af\u30a2\u30c3\u30d7\uff01\u6388\u696d\u306e\u8cea\u3092\u9ad8\u3081\u3001\u6e96\u5099\u3092\u52b9\u7387\u5316\u3059\u308b\u305f\u3081\u306e\u9078\u308a\u3059\u3050\u308a\u306e\u6559\u6750\u3092\u7d39\u4ecb\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"https:\/\/www.youtube.com\/c\/kkuwako\">Youtube<\/a>\u2026\u79d1\u5b66\u5b9f\u9a13\u7b49\u306e\u52d5\u753b\u3092\u914d\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"https:\/\/music.youtube.com\/playlist?list=PLoK4ZvKN9S2NgpYIochcQs0aL-vrRB_Qw\">\u79d1\u5b66\u30e9\u30b8\u30aa<\/a>\u00a0\u2026\u79d1\u5b66\u30c8\u30d4\u30c3\u30af\u3092\u307b\u307c\u6bce\u65e5\u914d\u4fe1\u4e2d\uff01AI\u6280\u8853\u3092\u99c6\u4f7f\u3057\u3066\u4f5c\u6210\u3057\u305f\u300c\u8033\u3067\u697d\u3057\u3080\u79d1\u5b66\u300d\u3092\u304a\u5c4a\u3051\u3057\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"http:\/\/phys-edu.net\/wp\/?page_id=20940\">\u8b1b\u6f14<\/a>\u00a0\u2026\u5168\u56fd\u5404\u5730\u3067\u5b9f\u9a13\u8b1b\u7fd2\u4f1a\u30fb\u30b5\u30a4\u30a8\u30f3\u30b9\u30b7\u30e7\u30fc\u7b49\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"http:\/\/phys-edu.net\/wp\/?page_id=37\">About<\/a>\u00a0\u2026\u300c\u79d1\u5b66\u306e\u30cd\u30bf\u5e33\u300d\u306e\u30b3\u30f3\u30bb\u30d7\u30c8\u3084\u3001\u904b\u55b6\u8005\u3067\u3042\u308b\u6851\u5b50\u7814\u306e\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u30fb\u60f3\u3044\u3092\u307e\u3068\u3081\u3066\u3044\u307e\u3059\u3002<\/li>\r\n \t<li><a href=\"https:\/\/phys-edu.net\/wp\/?page_id=188\">\u304a\u554f\u3044\u5408\u308f\u305b<\/a>\u00a0\u2026\u5b9f\u9a13\u6559\u5ba4\u306e\u3054\u4f9d\u983c\u3001\u57f7\u7b46\u30fb\u8b1b\u6f14\u306e\u76f8\u8ac7\u3001\u79d1\u5b66\u76e3\u4fee\u7b49\u306f\u3053\u3061\u3089\u306e\u30d5\u30a9\u30fc\u30e0\u304b\u3089\u304a\u5bc4\u305b\u304f\u3060\u3055\u3044\u3002<\/li>\r\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Olen Science Trainer Ken Kuwako. Jokainen p\u00e4iv\u00e4 on kokeilup\u00e4iv\u00e4. Kuvittele l\u00e4pin\u00e4kyv\u00e4 neste, joka muuttuu silm [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":59743,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","sns_share_botton_hide":"","vkExUnit_sns_title":"","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default"},"footnotes":"","jetpack_post_was_ever_published":false},"categories":[1630],"tags":[],"class_list":["post-66895","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category--fi"],"jetpack-related-posts":[{"id":65855,"url":"https:\/\/phys-edu.net\/wp\/?p=65855&lang=fi","url_meta":{"origin":66895,"position":0},"title":"V\u00e4lill\u00e4 nestett\u00e4, v\u00e4lill\u00e4 kiinte\u00e4\u00e4! 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