J.R. S. answered • 01/03/18
Tutor
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Ph.D. in Biochemistry--University Professor--Chemistry Tutor
Sure. You can do that. Of course, to do it properly, you'll need a well-designed experimental approach, including proper controls, and awareness of other variables. If you want additional advice, post again asking specific questions.
J.R. S.
tutor
Yes, you can do that, but then the question would be "what would have happened to the bacteria in those same petri dishes if you had just opened them and then closed them again. If you see an effect of the added sanitizer, you can't be sure it was actually due to the sanitizer or to some other "variable" that you don't know about. Also, if you see an effect of the sanitizer, is it the chemicals in the sanitizer or the alcohol, or water that those chemicals are dissolved in? That's what I meant by controls and variables. I suppose if you are in an early grade in school then doing what you propose would be ok. But it isn't "scientifically" sound.
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01/03/18