Question

How does a buffer regulate pH?

a.It changes Ka and Kb of added acids and bases.
b.It prevents added acids or bases from reacting.
c.It removes added H+ or OH– from the solution.
d.It lowers the activation energy of the reaction.?

Answer 1

C is the correct answer.a buffer reacts with the added acid or base which can produce H+ or hydroxide ion,or a kind of removing H+ or hydroxide added to solution.remember that buffers don't prevent additional acid or base from reacting,they react with the additional themselves.the A and D are completely wrong.