Question

The $\left[H_3{O}^{+}\right]$ concentration will not be affected by the addition of water is :

• A. chemical pH indicator
• B. acid/base buffer
• C. anhydrous solution
• D. hypotonic solution
• E. supersaturated solution

Answer 1

Answer: (B)

acid/base buffer

A buffer solution is one which resists changes in pH when small quantities of an acid or an alkali are added to it.
Acidic buffer solutions:
An acidic buffer solution is simply one which has a pH less than $7$. Acidic buffer solutions are commonly made from a weak acid and one of its salts - often a sodium salt.
Alkaline buffer solutions:
An alkaline buffer solution has a pH greater than $7$. Alkaline buffer solutions are commonly made from a weak base and one of its salts.