|Volume of hydrochloric acid / cm3||Volume of deionised water / cm3||Time taken for magnesium to disappear / s||Time taken for magnesium to disappear / s||Time taken for magnesium to disappear / s|
In this experiment we can use the times to calculate an approximate value for the rate of each reaction by using the formula:-
Using your average times calculate the rate of reaction for each experiment:-
|Average time / s||Rate / s-1|
We can also calculate the percentage of acid used, or, since we know the original concentration of the acid is 2 mol/dm3, we can calculate the concentrate for each experiment:-
|Volume of acid / cm3||Percentage acid||Concentration /mol/ dm3|
Finally, we can plot a graph of our Independent Variable (x-axis) against our Dependent Variable (y-axis). Your Independent Variable will be either % Acid, or Concentration. Your Dependent Variable will either be time or rate. Your teacher will instruct you on which to use.