<span>A buffer is able to resist pH change because the two components (conjugate acid and conjugate base) are both present in appreciable amounts at equilibrium and are able to neutralize small amounts of other acids and bases (in the form of H 3O + and OH -) when the are added to the solution.</span>Feb 7, 2016
I believe the blank is "mass."
You’re answer is C. I hope this helps!
