KVPY SX SB Exam 19-Nov-2017 Question Paper

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Question : 53 of 120

Marks: +1, -0

An excess of

Ag_2CrO_4(s)

is added to a 5 × 10

^{–3}

M

K_2CrO_4

solution. The concentration of Ag

^{+}

in the solution is closest to
[Solubility product for

Ag_2CrO_4

= 1.1 × 10

^{–12}

]

2.2 × 10 $^{–10}$ M
1.5 × 10 $^{–5}$ M
1.0 × 10 $^{–6}$ M
5.0 × 10 $^{–3}$ M

Solution:

1.1× 10^{–12 }= [Ag^{+}]^2 [ 5× 10^{–13}]

∴

[Ag^{+}] = 1.5 × 10^{–5}

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