Chemistry

Problem

Sodium acetate trihydrate, CH

_3

COONa·3H

_2

O (molar mass

136.1\,\text{g}\,\text{mol}^{-1}

), is

97.0\%

pure by mass. What mass, in grams, of this solid should be weighed to prepare

250\,\text{mL}

of a

0.400\,\text{M}

sodium acetate solution?