SATHEE: Equilibrium Question 756

Equilibrium Question 756

Question: When equal volumes of the following solutions are mixed, precipitation of AgCl ( $K_{s p}$ = $1.8 \times 10^{- 10}$ ) will occur only with

Options:

A) $10^{- 4} M (A g^{+}), a n d, 10^{- 4} M (C l^{-})$

B) $10^{- 5} M (A g^{+}), a n d, 10^{- 5} M (C l^{-})$

C) $10^{- 16} M (A g^{+}), a n d, 10^{- 6} M (C l^{-})$

D) $10^{- 10} M (A g^{+}), a n d, 10^{- 10} M (C l^{-})$

Show Answer

Answer:

Correct Answer: A

Solution:

$A g C l \to [A g^{+}] + [C l^{-}]$

$= (\frac{10^{- 4} \times V}{2 V}) (\frac{10^{- 4} \times V}{2 V}) = 2.5 \times 10^{- 9}$

This value is greater than $K_{s p} = 1.8 \times 10^{- 10}$

(2) IP= $(\frac{10^{- 5} \times V}{2 V}) (\frac{10^{- 5} \times V}{2 V}) = 2.5 \times 10^{- 11} < K_{s p}$

(3) IP= $(\frac{10^{- 16} \times V}{2 V}) (\frac{10^{- 6} \times V}{2 V}) = 2.5 \times 10^{- 23} < K_{s p}$

(4) IP= $(\frac{10^{- 10} \times V}{2 V}) (\frac{10^{- 10} \times V}{2 V}) = 2.5 \times 10^{- 21} < K_{s p}$

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Equilibrium Question 756

Question: When equal volumes of the following solutions are mixed, precipitation of AgCl ( Ksp = 1.8×10−10 ) will occur only with

Options:

Answer:

Solution:

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Question: When equal volumes of the following solutions are mixed, precipitation of AgCl ( $K_{s p}$ = $1.8 \times 10^{- 10}$ ) will occur only with