The solubility of Mg OH 2 is increased by the addition of NH4- ion- Given- Ksp of MgOH2-6- 10-12- Kb of NH3-1-8 - 10-5Solubility of Mg OH 2 in a solution containing 0-5M NH4Cl before addition of Mg OH 2 is-

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Standard XII

Chemistry

Periodic Properties

The solubilit...

Question

The solubility of $M g {(O H)}_{2}$ is increased by the addition of ${N H}_{4}^{+}$ ion.
Given: $K_{s p}$ of $M g (O H)_{2} = 6 \times 10^{- 12}$ , $K_{b}$ of $N H_{3} = 1.8 \times 10^{- 5}$

Solubility of $M g {(O H)}_{2}$ in a solution containing $0.5 M$ ${N H}_{4} C l$ before addition of $M g {(O H)}_{2}$ is:

0.081 M

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0.085 M

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0.077 M

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None of these

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Solution

The correct option is A $0.081 M$

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Similar questions

Q. A solution has

0.05 M

{M g}^{2 +}

and

0.05 M

{N H}_{3}

. Calculate the concentration of

{N H}_{4} C l

required to prevent the formation of

M g {(O H)}_{2}

in this solution.

K_{s p}

M g {(O H)}_{2} = 9.0 \times 10^{- 12}

and ionisation constant of

{N H}_{3} = 1.8 \times 10^{- 5}

Find out the solubility of $M g (O H)_{2}$ in $0.1 M N a O H$ solution.
[Given that the solubility product of $M g (O H)_{2}$ is $1.8 \times 10^{- 11}$ ]

Q. A solution has

0.05 M M g^{2 +}

and

0.05 M N H_{3}

. Calculate the concentration of

N H_{4} C l

required to prevent the formation of

M g (O H)_{2}

in this solution.

K_{s p} of M g (O H)_{2} = 9.0 \times 10^{- 12}

and ionization constant of

N H_{3} = 1.8 \times 10^{- 5}

(Given,

\sqrt{1.8} = 1.34

)

Q. Find out the solubility of

M g (O H)_{2}

0.1 M N a O H

. Given that solubility product of

M g (O H)_{2}

1.8 \times 10^{- 11}

Q. What is the

K_{c}

for the reaction:

{M g {(O H)}_{2}}_{(s)} + 2 {N H}_{4}^{+}_{(a q)} ⇌ 2 {N H}_{3}_{(g)} + 2 {H_{2} O}_{(a q)} + {M g}_{(a q)}^{2 +}

(Given that the solubility product for

M g (O H)_{2}, K_{s p}

6 \times 10^{- 12} m o l^{3} L^{- 3}

and

the base dissociation constant for

N H_{4} O H, K_{b}

1.8 \times 10^{- 5} m o l L^{- 1}

)

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The solubility of Mg(OH)2 is increased by the addition of NH+4 ion. Given: Ksp of Mg(OH)2=6×10−12, Kb of NH3=1.8×10−5Solubility of Mg(OH)2 in a solution containing 0.5M NH4Cl before addition of Mg(OH)2 is:

The correct option is A 0.081M

The correct option is A $0.081 M$