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Good day.
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The topic is about standard procedures in laboratory.
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The procedures in the laboratory are designed in order to ensure the safety of those who perform experiments in the laboratory.
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So in the following, we will reason out or we will give reasons as to why these procedures are valid and must be observed in laboratories.
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Number one, one should wear goggles and apron in the lab even if you, even if one is only an observer.
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This is true because in the laboratory spillage is possible.
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And aside from that, the laboratory room itself may be saturated with chemical vapors fuming out of, say, concentrated solution.
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And so the reason as to why we should wear goggles and apron is to avoid fumes or liquid to get in contact with your clothes and your skin.
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So we write that here as follows.
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So we say to avoid fumes or liquid to get in contact with your clothes.
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Right next, we should also avoid returning the unused chemical to the stock bottle.
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So the stock battle is the solution from which we withdraw certain chemicals...