JEE Main · 2026 · 06 Apr 2026 · Shift 2 · Coordination Compounds

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An excess of AgNO₃ is added to 100 mL of a 0.05 M solution of tetraaquadichloridochromium (III) chloride. The number of moles of AgCl precipitated will be _____ × 10⁻³. (Nearest integer)

Answer: 5

Solution

In tetraaquadichloridochromium(III) chloride,

[Cr (H_{2} O)_{4} C l_{2}] Cl

, only the single chloride outside the coordination sphere is free to precipitate, the two coordinated chlorides staying bound. Each mole of complex thus yields one mole of silver chloride. The moles of complex are

0.05 \times \frac{100}{1000} = 5 \times 1 0^{- 3}

, so the silver chloride precipitated is

5 \times 1 0^{- 3}

mol, giving 5.

JEE Main · 2026 · 06 Apr 2026 · Shift 2 · Integer answer

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