A buffer contains significant amounts of a weak acid and a salt containing its conjugate base. The acid consumes any added base, and the base consumes any added acid. In this way, a buffer resists pH change. Strong acids, strong bases, two bases, or two acids cannot form a buffer on their own. Part A Which set of compounds would form a buffer in aqueous solution?

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anfabba15 anfabba15 · Answer 1 · 2019-11-07T19:42:39-05:00

Answer:

A set of compounds which can form a buffer in aqueous solution are, the acetic acid and the sodium acetate.

Explanation:

The acetic acid reacts in water by this equation

CH3COOH + H2O ⇆ CH3COO- + H3O+ (Ka)

As a weak acid, in aqueous solution, you must have the acid equilibrium.

The CH3COOH works as the acid, and CH3COO- is the conjugate base.

NaCH3COO is the salt from the conjugate base of a weak acid, so in water you have the hydrolisis. And in this case is an hydrolisis basic.

NaCH3COO → Na+ + CH3COO-

CH3COO- + H2O ⇄ CH3COOH + OH - (Kb)

When you have a weak acid which reacts with a strong base, you have a reaction by neutralization.

CH3COOH + NaOH→ NaCH3COO + H2O

A buffer maintains the acidity or alkalinity of a system in a reduced pH range