Whilst the rate of reaction can be investigated in several ways there are typically three classic experiments used with ... carbonate (marble chips) and hydrochloric acid magnesium and hydrochloric ...

The gastric juice contains not only lactic acid, but a large amount of hydrochloric acid ... and employing for each experiment a distinct sample of powder, he fed the biscuits to cats that ...

Materials A, B, C and D are added to the tubes. Each material reacts with the acid to produce a stream of bubbles.