Achunk of limestone, which is calcium carbonate, reacts with acid. how might you increase the rate of this reaction?

remove any catalyst?
crush the limestone?
decrease the temperature?
add water to the acid?

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?