Watch the video and answer these questions
1 when preparing the dilution of a concentrated acid with water, what is the most important rule to follow?
2- in the laboratory, where should you work with volatile chemical reagents ? Why?
3- when heating a test tube directly in the flame , how should you do it correctly ?
4- when you smell gas in the laboratory, what should you do?
5- mention the most important emergency equipment in the chemistry laboratory
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