Question

1. what is the function of a buffer, such as bicarbonate ions in the blood?

Explanation:

Buffers, like bicarbonate ions in the blood, resist pH changes. They absorb excess H+ or OH- ions. In blood, bicarbonate (\(HCO_3^-\)) can react with added acid (\(H^+\)): \(H^+ + HCO_3^-
ightleftharpoons H_2CO_3\), or with added base (\(OH^-\)): \(OH^-+ H_2CO_3
ightleftharpoons HCO_3^- + H_2O\). This helps maintain blood's pH (around 7.35 - 7.45), which is crucial for enzyme function and overall physiological processes.

Answer:

The function of a buffer such as bicarbonate ions in the blood is to resist changes in pH.