Question

On treating 100 mL of 0.1 M aqueous solution of the complex CrCl₃.6H₂O with excess of AgNO₃, 2.86 g of AgCl was obtained. The complex is:

• A. [Cr(H₂O)₃Cl₃].3H₂O
• B. [Cr(H₂O)₄Cl₂]Cl.2H₂O
• C. [Cr(H₂O)₅Cl]Cl₂.H₂O
• D. [Cr(H₂O)₆]Cl₃

Hint:

The release of 2 moles of AgCl per mole of the complex confirms two chloride counter-ions outside the coordination sphere.

Answer 1

The Correct Option is C

The given data indicates that 1 mole of the complex releases 2 moles of AgCl upon treatment with AgNO₃. This confirms that the complex contains two chloride ions as counter-ions outside the coordination sphere.