Chemistry

Problem

\mathrm{FeCl_{3}\cdot6H_{2}O}

(molar mass

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

) available in the storeroom is only 95.0 % pure by mass. What minimum mass of this hydrate should a student weigh to prepare 500.0 mL of 0.100 M

\mathrm{FeCl_{3}}

(aq)? Assume all

\mathrm{FeCl_{3}}

in the sample dissolves. a)

8.54\,\text{g}

27.0\,\text{g}

14.2\,\text{g}

13.5\,\text{g}