When pieces of zinc are added to an aqueous solution of hydrochloric acid, the solution releases hydrogen gas and a
solution of zinc chloride forms. Which two changes would likely increase the rate of this reaction?
Adding more zinc pieces increases the concentration of one of the reactants. If the hydrochloric acid solution is heated, the temperature of the reactants rises. Both actions increase the probability of collisions occurring between the reactants’ atoms and causing a reaction.
