Posted: March 1st, 2021
A teacher demonstrated the possible effects of acid rain by placing
A teacher demonstrated the possible effects of acid rain by placing several types of rocks in separate beakers containing a vinegar solution with a pH of 3. As time passed, someof the solutions retained a pH of 3 while othersolutions gradually reached a pH of 7. Which ofthe following best explains this variation of pH inthis demonstration?A All solutions eventually reach a pH of 7, so the experiment is not complete.B Vinegar is an organic compound that react sun predictably with inorganic rocks.C The rocks have varying chemical composition,so some but not all of them react with acid.D The students should have measured the pH immediately after mixing since acid rain reacts quickly in nature.
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