The crystalline salt ZnSO4.xH2O on heating loses 43.82% of its molecul

1.	The crystalline salt ZnSO4.xH2O on heating loses 43.82% of its molecular weight. What is the formula of crystalline salt?
Answer» ZnSO4.xH2O The molecular mass = 65.4 + 32 + 64 + 18x = 161.4+18x The mass of ANHYDROUS salt = 161.4 Given 18x * 100/ (161.4+18x) = 43.82 1800x = 7072.55 + 788.76x x = 7072.55/1011.24 = 6.99 = 7 Therefore the COMPOUND is ZnSO4.7H2O

The crystalline salt ZnSO4.xH2O on heating loses 43.82% of its molecular weight. What is the formula of crystalline salt?

Answer»

ZnSO4.xH2O

The molecular mass = 65.4 + 32 + 64 + 18x = 161.4+18x

The mass of ANHYDROUS salt = 161.4

Given 18x * 100/ (161.4+18x) = 43.82

1800x = 7072.55 + 788.76x

x = 7072.55/1011.24 = 6.99 = 7

Therefore the COMPOUND is ZnSO4.7H2O