{"id":66882,"date":"2026-08-26T04:37:43","date_gmt":"2026-08-25T19:37:43","guid":{"rendered":"https:\/\/phys-edu.net\/wp\/?p=66882"},"modified":"2026-08-26T04:37:43","modified_gmt":"2026-08-25T19:37:43","slug":"when-magic-liquid-turns-into-a-mirror-the-beauty-and-explosive-danger-of-the-silver-mirror-reaction","status":"publish","type":"post","link":"https:\/\/phys-edu.net\/wp\/?p=66882&lang=en","title":{"rendered":"When Magic Liquid Turns into a Mirror! The Beauty and “Explosive” Danger of the Silver Mirror Reaction"},"content":{"rendered":"

I\u2019m Ken Kuwako, your Science Trainer. Every day is an experiment.<\/strong><\/span><\/p>\n

A clear liquid suddenly transforms into a sparkling mirror before your eyes. Have you ever seen anything that looks quite so magical? The world of science is full of beautiful experiments that seem almost like alchemy. One of the most spectacular examples is the silver mirror reaction<\/b>, which I\u2019m going to introduce today.<\/p>\n

After receiving an enthusiastic \u201cWe want to try it!\u201d from the students in our science club, we prepared everything in the laboratory and gave it a go. The results are incredibly beautiful, but there is a serious side to this experiment, too: it involves powerful chemicals<\/b>, and if handled improperly, there is even a risk of explosion<\/b>. In this article, I\u2019ll take you behind the scenes of this dazzling experiment and explore the fascinating science hidden within it.<\/p>\n

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The \u201cAbsolutely Essential Rule\u201d Before You Start<\/h3>\n

This experiment uses chemicals such as silver nitrate, sodium hydroxide, and concentrated ammonia solution, which has a sharp, pungent smell. These substances can be extremely hazardous, so the experiment must always be carried out under the supervision of a qualified teacher or other responsible adult. Sodium hydroxide can cause severe chemical burns and damage skin, so wearing rubber gloves and a lab coat is essential. Safety goggles are also a must to protect your eyes.<\/p>\n

And there is one more rule that must never be ignored: do not put off cleanup<\/b>. If the waste is left sitting around, an explosive substance can form on its own, potentially leading to a serious accident (more on this later). There have even been accidents at school cultural festivals in the past. When it comes to experiments like this, safety is even more important than the experiment itself.<\/p>\n

[ What You\u2019ll Need ]<\/h3>\n

\u30fbSilver nitrate 2 g \u30fbWater, as needed (18 g) \u30fbConcentrated ammonia solution (a small amount) \u30fbSodium hydroxide 1.44 g \u30fbGlucose 0.3 g \u30fbBeakers, graduated cylinder, electronic balance<\/p>\n

[ Experimental Procedure ]<\/h3>\n

Preparation: Before starting the experiment, thoroughly clean the test tube with a suitable cleaning solution.<\/p>\n

\u2460 Mix 2 g of silver nitrate with 18 g of water to prepare 20 g of silver nitrate solution.<\/p>\n

\u2461 Add concentrated ammonia solution drop by drop to the solution from step \u2460. A brown precipitate will appear at first, but as you continue adding ammonia, it will dissolve and the solution will become clear and colorless again.<\/p>\n

\u2462 Mix in 6 mL of a solution prepared by dissolving 1.44 g of sodium hydroxide in water. The mixture will become cloudy and dark brown.<\/p>\n

\u2463 Carefully add more concentrated ammonia solution until the precipitate completely disappears and the solution becomes clear and colorless again. This is the key reagent for the reaction, known as Tollens\u2019 reagent.<\/p>\n

\u2464 Mix 0.3 g of glucose with 2.7 g of water to prepare 3 g of glucose solution.<\/p>\n

\u2465 Mix the solutions from steps \u2463 and \u2464 and place the mixture in the test tube.<\/p>\n

That\u2019s it\u2014the preparation is complete! All you have to do now is keep shaking the test tube for about 8 minutes. Before long, the inside wall of the test tube gradually transforms into a beautiful mirror.<\/p>\n

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