Question

Which of the following complexes produces three moles of silver chloride when its one mole is treated with excess of silver nitrate?

• A. [Cr(H2O)3Cl3]
• B. [Cr(H2O)4Cl2]Cl
• C. [Cr(H2O)5Cl]Cl2
• D. [Cr(H2O)6]Cl3

Answer 1

Answer: (D)

$Cr(H2O)6$Cl3

Answer 2

(4) [Cr(H2O)6]Cl3 [Cr(H2O)6]3+ (aq) + 3Cl– (aq).

Cl– present in ionisation sphere will give precipitate with AgNO3 .

3Cl– + 3Ag+ $\longrightarrow$3AgCl

So, one mole of complex will give three moles of AgCl precipitate.