Ways of Representing the Concentration of a Solution
Determine the...
Question
Determine the mol. of AgI which may be dissloved in 1.0L of 1.0MCN⊝. solution. Ksp for AgI and Kc for Ag(CN)⊝2 are 1.2×10−17M2 and 7.1×1019M−2, respectively.
A
0.5
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B
0.25
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C
0.16
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D
None of these
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Solution
The correct option is A0.5 Given Agl(s)⇌Ag⊕(aq)+I⊝(aq);
Ksp=[Ag⊕][I⊝]=1.2×10−17
Ag⊕(aq)+2CN⊝(aq)⇌[Ag(CN)2]⊝(aq);
Kf=[Ag(CN)⊝2][Ag⊕][CN⊝]2=7.1×1019
Let x mole of AgI be dissolved in CN⊝ solution then,
Now, AgI(s)+2CN⊝⇌[Ag(CN)⊝2]+I⊝ Mole before reaction 1 0 0 Mole after reaction (1−2x)xx