A solution is found to contain -Cl-1-5- 10-1M- -Br- - 5-0- 10-4M- -CrO42-1-9- 10-2MA solution of AgNO3 100

The correct option is C AgCl and AgBr togetherAccording to given data, #160; [Ag^+] needed for precipitation of AgCl= 1.5× 10 ^ 10 1.5 ...

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Standard XII

Chemistry

Common Ion Effect

A solution is...

Question

A solution is found to contain $[C l^{⊝}] = 1.5 \times 10^{- 1} M; [B r^{⊝}] = 5.0 \times 10^{- 4} M; [C r O_{4}^{2 -}] = 1.9 \times 10^{- 2} M$
A solution of $A g N O_{3}$ (100% dissociated) is added to the above solution drop by drop. Which silver salt will precipitate first?
Given: $K_{s p} (A g C l) = 1.5 \times 10^{- 10}, K_{s p} (A g B r) = 5.0 \times 10^{- 13}$ , $K_{s p} (A g C r O_{4}) = 1.9 \times 10^{- 12}$

A g C l

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A g B r

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A g_{2} C r O_{4}

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A g C l

and

A g B r

together

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Solution

The correct option is C $A g C l$ and $A g B r$ together
According to given data, $[A g^{+}]$ needed for precipitation of
$A g C l = \frac{1.5 \times 10^{- 10}}{1.5 \times 10^{- 1}} = 10^{- 9} M$
$A g B r = \frac{5 \times 10^{- 13}}{5 \times 10^{- 4}} = 10^{- 9} M$
$A g_{2} C r O_{4} = (\frac{1.9 \times 10^{- 12}}{1.9 \times 10^{- 2}})^{1 / 2} = 10^{- 5} M$
So $A g C l$ and $A g B r$ will start precipitating together.

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Similar questions

Q. The

K_{s p}

A g_{2} C r O_{4}, A g C l, A g B r AgI

are respectively,

1.1 \times 10^{- 12}, 1.8 \times 10^{- 10}, 5.0 \times 10^{- 13}, 8.3 \times 10^{- 17}

. Which one of the following salts will precipitate last if

A g N O_{3}

solution is added to the solution containing equal moles of

N a C l, N a B r, N a I and N a_{2} C r O_{4}

Q. Solid

A g N O_{3}

is added to a solution which is

0.1 M

C l^{-}

and

0.1 M

C r O_{4}^{2 -}

. If

K_{s p}

values for

A g C l

and

A g_{2} C r O_{4}

solutions are

1.7 \times 10^{- 10}

and

1.9 \times 10^{- 12}

respectively. Find the minimum concentration of

C l^{-}

when

A g_{2} C r O_{4}

starts precipitating.

Q. The

K_{s p}

A g_{2} C r O_{4}, A g C l, A g B r

and

A g l

are respectively,

1.1 \times 10^{- 12}, 1.8 \times 10^{- 10}

5.0 \times 10^{- 13}, 8.3 \times 10^{- 17}

. Which one of the following salts will precipitate last if

A g N O_{3}

solution is added to the solution containing equal moles of

N a C l, N a B r, N a I

and

N a_{2} C r O_{4}

Q. The

K_{s p}

A g_{2} C r O_{4}, A g C l, A g B r

and

A g l

are respectively,

1.1 \times 10^{- 12}, 1.8 \times 10^{- 10}, 5.0 \times 10^{- 13},

. Which of these will precepitate last if

A g N O_{3}

solution is added to a solution containing equal moles of NaCl, NaBr, NaI and

N a_{2} C r O_{4}

Q. A solution contains

0.1 M

{C l}^{-}

and

0.001 M

C r O_{4}^{2 -}

. If solid

A g {N O}_{3}

is gradually added to this solution, which will precipitate first,

A g C l

{A g}_{2} C r O_{4}

? Assume that the addition causes no change in volume. Given

K_{s p} A g C l = 1.7 \times 10^{- 10} M^{2}

K_{s p} {A g}_{2} C r O_{4} = 1.79 \times 10^{- 12} M^{3}

What percent of

{C l}^{-}

remains in the solution when

C r O_{4}^{2 -}

starts precipitating?

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A solution is found to contain [Cl⊝]=1.5×10−1M;[Br⊝]=5.0×10−4M;[CrO2−4]=1.9×10−2MA solution of AgNO3 (100% dissociated) is added to the above solution drop by drop. Which silver salt will precipitate first?Given: Ksp(AgCl)=1.5×10−10,Ksp(AgBr)=5.0×10−13, Ksp(AgCrO4)=1.9×10−12

The correct option is C AgCl and AgBr togetherAccording to given data, [Ag+] needed for precipitation ofAgCl=1.5×10−101.5×10−1=10−9MAgBr=5×10−135×10−4=10−9MAg2CrO4=(1.9×10−121.9×10−2)1/2=10−5MSo AgCl and AgBr will start precipitating together.