Suppose your instructor handed you a bottle of hydrochloric acid of unknown concentration. The chemistry department was considering using it for a summer program for elementary students to test rock samples to see if they contain limestone. However, they don't want to give it to the kids if it is too strong, and noone in the department was willing to drop some on their skin, and all the graduate students and TA's were already guinea pigs in other experiments, and the department did not want to compromise the data from that research in any way. So, the task falls to you, the eager undergraduate student.
[i] First, explain, using a balanced chemical equation, and then describing/discussing it, how hydrochloric acid could test for the presence of limestone. What specific reaction would be taking place, and what easily noticeable phenomenon would you be looking for when doing this test? Why