Опубликовал Admin
13-04-2022, 13:10
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How to Dissolve an Eggshell
You can dissolve the shell of an egg so that the membrane is completely intact, leaving the egg “naked.” The process is simple, takes only a few days, and can easily be done using household objects. An eggshell is made up mostly of a compound called calcium carbonate which dissolves when exposed to an acid such as vinegar. During the chemical reaction, you will see tiny bubbles of
Опубликовал Admin
3-05-2021, 16:00
213
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How to Conduct the Squeaky Pop Experiment
The squeaky pop experiment is a typical science lab technique used to test for the presence of hydrogen, which is both colorless and odorless. When you have hydrogen gas trapped in a container, you can place a lit match near it and it will make a characteristic “squeaky pop” sound as it reacts with the flame. If you ever need to test for the presence of hydrogen gas, this is an easy