Why does higher molar acid react faster?

sigh

We don’t do your homework for you here.

(but essentially, high molar acids are more concentrated)

@tedd is correct, in that we won’t just give you the answer. But many of us have a solid scientific background. Expanding on what @tedd said, why do you think a higher molarity (or higher concentration) of acid in a solution would drive the reaction to go more quickly? If you’ve studied some of the basics of kinetics in your class, consider the principles of that.

@cockswain I think it has come back to me. Is it because the higher the concentration of acid the more acid particles there are to react to a substance.

Pretty much. By increasing the concentration of the acid, you are increasing the likelihood that the protons from the acid will collide with the reactant. The higher this probability of interaction, the faster the rxn.