Coordination Compounds 1 Question 25
25. The volume (in $mL$ ) of $0.1 $ $ M$ $ AgNO _3$ required for complete precipitation of chloride ions present in $30$ $ mL$ of $0.01 M$ solution of $\left[Cr\left(H _2 O\right) _5 Cl\right] Cl _2$, as silver chloride is close to
(2011)
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Answer:
Correct Answer: 25. $(6)$
Solution:
- $mmol$ of complex $=30 \times 0.01=0.3$
Also, $1$ mole of complex $\left[Cr\left(H _2 O\right) _5 Cl\right] Cl _2$ gives only two moles of chloride ion when dissolved in solution
$\left[Cr\left(H _2 O\right) _5 Cl\right] Cl _2 \longrightarrow\left[Cr\left(H _2 O\right) _5 Cl^{2+}+2 Cl^{-}\right.$
$\Rightarrow mmol$ of $Cl^{-}$ ion produced from its $0.3 $ $mmol=0.6$
Hence, $0.6$ $ mmol$ of $Ag^{+}$ would be required for precipitation.
$\Rightarrow 0.60$ $ mmol$ of $Ag^{+}=0.1 M \times V($ in $mL) \Rightarrow V=6 $ $mL$
BETA
