Chemistry

Problem

1.0\,\text{L}

propanoic acid buffer at

25^{\circ}\text{C}

contains

[\text{HA}]=0.30\,\text{M}

and

[\text{A}^-]=0.10\,\text{M}

. What is the minimum amount of solid

\text{NaOH}

(in moles) that must be added so that the buffer’s pH increases by exactly 1.00 unit? (Assume the volume change is negligible.) a)

1.0\times10^{-1}\,\text{mol}

2.1\times10^{-1}\,\text{mol}

1.3\times10^{-1}\,\text{mol}

2.6\times10^{-1}\,\text{mol}