In this lab, we'll be synthesizing an Fe oxalate using \( \left(\mathrm{NH}_{4}\right)_{2} \mathrm{Fe}\left(\mathrm{SO}_{4}\right)_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \). The formula of the Fe oxalate you synthesize will be in the form of \( \mathrm{FeC}_{2} \mathrm{O}_{4} \cdot n \mathrm{H}_{2} \mathrm{O} \), where \( n \) could be 1,2 , or 3 .
Calculate the molar masses of \( \left(\mathrm{NH}_{4}\right)_{2} \mathrm{Fe}\left(\mathrm{SO}_{4}\right)_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \) and the three possible Fe oxalates \( \left(\mathrm{FeC}_{2} \mathrm{O}_{4} \cdot n \mathrm{H}_{2} \mathrm{O}\right) \).
a. \( \left(\mathrm{NH}_{4}\right)_{2} \mathrm{Fe}\left(\mathrm{SO}_{4}\right)_{2} \cdot 6 \mathrm{H}_{2} \mathrm{O} \) : \( \square \) \( \mathrm{g} \mathrm{mol}^{-1} \)
b. \( \mathrm{FeC}_{2} \mathrm{O}_{4} \cdot \mathrm{H}_{2} \mathrm{O} \) : \( \square \) \( \mathrm{g} \mathrm{mol}^{-1} \)
c. \( \mathrm{FeC}_{2} \mathrm{O}_{4} \cdot 2 \mathrm{H}_{2} \mathrm{O} \) : \( \square \) \( \mathrm{g} \mathrm{mol}^{-1} \)
d. \( \mathrm{FeC}_{2} \mathrm{O}_{4} \cdot 3 \mathrm{H}_{2} \mathrm{O} \) : \( \square \) \( \mathrm{g} \mathrm{mol}^{-1} \)