Determine the mass of NaHCO (molar mass = 84.0 g mol ) that must be dissolved in a…
CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases
Problem
Determine the mass of NaHCO3 (molar mass = 84.0 g mol−1) that must be dissolved in a solution already containing 0.0500 mol of H2CO3 to produce 50.0 mL of buffer at pH 6.40. (For the first dissociation of carbonic acid, pKa=6.37.) Give your answer to three significant figures.