Rates of reactions between HCL and magnesium ribbon

Rates of reactions between HCL and magnesium ribbon
Aim

I plan to investigate the effect of concentration of acid, in the reaction between dilute hydrochloric acid and magnesium ribbon. The rate of a chemical reaction is a measure of how fast the reaction takes place. It is important to know that a rapid reaction is completed in a short period of time. Some reactions are very fast, for example; the formation of silver chloride precipitates when silver nitrate and hydrochloric acid solutions are mixed. In this investigation I will test different concentrations of acid reacting with magnesium.
/Plan
To investigate what effect concentration of sodium thiosulphate has on the rate of reaction. The volume of HCL needs to be kept at 10cm3 constantly each time. Start with 60cm3 of sodium thiosulphate. Last reaction will have only 10cm3 of sodium thiosulphate.
Reactions will be completed when the x disappears, for the timing to stop. Three reactions will be made for each test; this is do...