Rates of reaction between magnesium and hydrochloric acid when using different concentrations One way of making the reaction between magnesium and hydrochloric acid more effective or less effective would be to use higher or lower concentrations of either the magnesium or hydrochloric acid. Temperature and surface area can also make a reaction faster or slower. A catalyst can make a reaction faster without actually taking part in the reaction. A high concentration makes a reaction …showed first 75 words of 543 total…

…showed last 75 words of 543 total…A greater surface area means that there will be a higher chance of a collision as there is a higher chance that the reactants will collide. How a catalyst effects the rate of a reaction A catalyst makes a reaction faster without being used up. What a catalyst does is hold a reactant still so it can’t move. As a reactant is still, there is a higher chance of another reactant colliding with it.