What do the results mean? My hypothesis was right, HCl broke down the limestone the most, 12% of the limestone was broken down in the hydrochloric acid.
Do they really show that? Yes, because the bottom of the HCl bowl had 15 g of residue. The vinegar bowl had 10 g of residue and the water bowl had no residue.
Did they support my hypothesis, or is further work needed? Yes, my results supported my hypothesis. Hydrochloric acid will break down the limestone the most (12%) , leaving more residue than vinegar(8%) and water (0%).
Are there other explanations for what happened? HCl was the strongest acid with pH of 1. The limestones were sitting in a liquid for 14 days. During the 14 days, the liquid was evaporating.
How do my results compare to what I’ve read about this topic? Acid rain has a pH of 0-5. If acid rain falls in Collingwood, it could erode some of the limestone that is underneath Collingwood and the Escarpment. It could destroy the town and the ski hills.
What could have been better about my method? I feel that the experiment was carried out in correct method.