Chapter 13 - The Chemistry of Solutes and Solutions - Questions for Review and Thought - Topical Questions - Page 605c: 59a

Mass fraction= 0.0586 Weight percent= 5.86%

Mass fraction of $K_{2}CrO_{4}$= $\frac{mass\,of\,K_{2}CrO_{4}}{mass\,of\,K_{2}CrO_{4}+mass\,of\,H_{2}O}= \frac{14.0\,g}{14.0\,g+225\,g}$ $=0.0586$ Weight percent= mass fraction$\times100\%$ $=0.0586\times100\%=5.86\%$