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OpenStudy (anonymous):
give two reasons why it is important to wash your hands both before and after completing a lab
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OpenStudy (abb0t):
avoid errors in analysis due to contamination. and also for safety reasons for yourself.
OpenStudy (anonymous):
You wash your hands before doing a lab to make sure that no extra substances could affect the your experiment.
OpenStudy (anonymous):
And after so that you wont harm your body from left over substances that may have gotten on you.
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