Complex A has a composition of H 12 O 6 Cl 3 C r . If the complex on treatment with conc. H 2 SO 4 loses 13 . 5 % of its original mass, the correct molecular formulas of A is: [Given : atomic mass of C r = 52 amu and C I = 35   amu]

Question

Complex A has a composition of H 12 O 6 Cl 3 C r . If the complex on treatment with conc. H 2 SO 4 loses 13 . 5 % of its original mass, the correct molecular formulas of A is: [Given : atomic mass of C r = 52 amu and C I = 35 &#160; amu]

Aicharya · Accepted Answer

Conc. H 2 SO 4 acts as dehydrating agent. Molar mass of given complex = 266 . 5 &#160; g / mol . On treating with conc. H 2 SO 4 the mass lost by the complex = 13 . 5 100 266 . 5 &#8776; 36 g = 2 moles of H 2 O Formula of the complex = Cr H 2 O 4 Cl 2 &#160; Cl &#183; 2 H 2 O

Complex A has a composition of H 12 O 6 Cl 3 C r . If the complex on treatment with conc. H 2 SO 4 loses 13 …

Solution