How would you design an experiment to investigate the rate of reaction between magnisium and sulphuric acid?

Prepare 5 equal volumes of sulphuric acid, but of of gradually increasing concentration, say 0.2, 0.4, 0.6, 0.8 and 1.0M. Measure out 5 equal samples of magnesium (eg 1cm lengths of Mg ribbon), and add them to the tubes of acid. measure the time taken for the Mg to dissolve completely.