A buffer
A) removes or replaces hydrogen ions in a solution.
B) is a compound with an extra electron in its outer shell.
C) has an unstable nucleus, making it highly reactive.
D) donates hydrogen ions to a solution.
E) consists of long carbon-carbon chains.

Question

Quizplus · Accepted Answer

A buffer is a solution that can resist changes in pH by either removing or replacing hydrogen ions. This is accomplished through the presence of a weak acid and its corresponding conjugate base, or a weak base and its corresponding conjugate acid. Buffers are important in biological systems, where pH must be tightly regulated for proper function. The other choices are not accurate descriptions of buffers.

A Buffer