How does the concentration of acid affect the rate of a reaction with calcium carbonate?
… when the hydrochloric acid was most dilute the cross took 711 seconds to disappear, and when the acid was most concentrated the cross took just 82 seconds to disappear. This shows that the more dilute the concentration of acid, the slower the rate of reaction and the more concentrated the acid the faster the rate of reaction because when acid is more concentrated there are more molecules, therefore increasing the chance of a successful collision, and speeding up the reaction. This is known as the ‘Collision Theory’. I am now going to do another experiment, using calcium carbonate and hydrochloric acid to see if the same effect is observed with a different reaction. Apparatus Needed o Gas syringe o Retort stand o Conical flask o Boss and clamp o Bung o 2x Measuring cylinder o Stopwatch o Delivery tube o Beaker o Balance o Goggles o CaCO3 (Medium sized Calcium Carbonate chips) o H2O (Water) o HCl (Hydrochloric acid) Diagram Below is a diagram showing how …
