A phosphate buffer (H₂PO₄⁻/HPO₄²⁻) is prepared at pH 7.2 and then diluted by adding…
CHEMISTRY · Subjective · AP · Chemistry · Acids and Bases · Acids and Bases
Problem
A phosphate buffer (H₂PO₄⁻/HPO₄²⁻) is prepared at pH 7.2 and then diluted by adding an equal volume of distilled water before any acid or base is introduced. A small amount of strong acid is now added to the diluted buffer. Compared with adding the same amount of acid to the original, undiluted buffer, will the resulting pH change be larger, smaller, or the same? Explain your answer briefly.