A student investigates the reaction between magnesium ribbon and hydrochloric acid:
Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g) \text{Mg(s)} + 2\text{HCl(aq)} \rightarrow \text{MgCl}_2\text{(aq)} + \text{H}_2\text{(g)} Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g)They repeat the experiment using hydrochloric acid of a higher concentration, keeping the temperature and the surface area of the magnesium ribbon the same.
Explain, in terms of particles and collisions, why the rate of reaction increases when the concentration of the acid is increased.
