Question

The reaction between manganese carbonate and dilute hydrochloric acid speeds up when some concentrated acids is added.

Answer 1

Answer:

As a general rule, The velocity of the chemical reaction depends on the concentration of the reactants. If one reactant is solid its concentration is constant. If another is liquid, as the subject of your question, hydrochloric acid, as the concentrations increase, the velocity of the reaction increases. Then, adding concentrating hydrochloric acid increases the concentration of this acid thus speeding up the chemical reaction.