Calcium hydroxide- Ca OH 2- has a lower solubility in water than some of the other Group II hydroxides K sp -4-0- 10 -6 at 25 -C - In a saturated solution of calcium hydroxide at this temperature- what is the concentration of calcium ions-

The correct option is C 1.0× 10 ^ 2 Ca(OH)_2⟶sCa^2++2s2(OH^ ) K_sp=[s][2s]^2=4s^3 ∴ 4× 10^ 6=4s^3 ∴ s^3=10^ 6 s=10^ 2 Hence, the ...

207

You visited us 207 times! Enjoying our articles? Unlock Full Access!

Byju's Answer

Standard XII

Chemistry

Solubility Product

Calcium hydro...

Question

Calcium hydroxide, ${C a (O H)}_{2}$ , has a lower solubility in water than some of the other Group II hydroxides ( $K_{s p} = 4.0 \times 10^{- 6}$ at $25^{\circ} C$ ). In a saturated solution of calcium hydroxide at this temperature, what is the concentration of calcium ions?

2.0 \times 10^{- 6}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

2.0 \times 10^{- 3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.0 \times 10^{- 2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

1.3 \times 10^{- 2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.6 \times 10^{- 2}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C $1.0 \times 10^{- 2}$
$C a (O H)_{2} ⟶ s C a^{2 +} + 2 s 2 (O H^{-})$
$K_{s p} = [s] [2 s]^{2} = 4 s^{3}$
$∴ 4 \times 10^{- 6} = 4 s^{3}$
$∴ s^{3} = 10^{- 6}$
$⟹ s = 10^{- 2}$
Hence, the concentration of calcium ions $= s = 1 \times 10^{- 2}$ $M$

Suggest Corrections

Similar questions

Q. A group of students left a mixture of calcium hydroxide and water to equilibrate at

20^{\circ} C

. They titrated the resulting saturated solution and found that if contained

0.040 mol/l

O H^{-}

ions. The solubility product constant

K_{s p} (C a (O H)_{2})

at this temperature is therefore:

Q. The solubility product of

C r (O H)_{3}

298 K

6 \times 10^{- 31}

. The concentration of hydroxide ions in a saturated solution of

C r (O H)_{3}

will be:

Q. The concentration of

[A g^{+}]

ion in a saturated solution of sparingly soluble salt

A g_{2} C r O_{4}

at equilibrium is

2.0 \times 10^{- 4}

. Calculate the value of

K_{s p}

for

A g_{2} C r O_{4}

Q. What is the

P^{H}

of a solution obtained by dissolving

0.0005

mole of the strong electrolyte, calcium hydroxide,

C a {(O H)}_{2}

to form

100 m l

of a saturated solution (aqueous)?
(

K_{w} = 1.0 \times 10^{- 14}

{m o l e}^{2} {l i t r e}^{- 2}

)

Q. A

1

litre solution containing

N H_{4} C l

and

N H_{4} O H

has hydroxide ion concentration of

10^{- 6}

mol/litre. Which of the following hydroxides could be precipitated when the solution is added to

1

litre solution of

0.1 M

metal ions?

(I) B a (O H)_{2} (K_{s p} = 5 \times 10^{- 3})

(I I) N i (O H)_{2} (K_{s p} = 1.6 \times 10^{- 16})

(I I I) M n (O H)_{2} (K_{s p} = 2 \times 10^{- 13})

(I V) F e (O H)_{2} (K_{s p} = 8 \times 10^{- 16})

Join BYJU'S Learning Program

Calcium hydroxide, Ca(OH)2, has a lower solubility in water than some of the other Group II hydroxides (Ksp=4.0×10−6 at 25∘C ). In a saturated solution of calcium hydroxide at this temperature, what is the concentration of calcium ions?

The correct option is C 1.0×10−2Ca(OH)2⟶sCa2++2s2(OH−)Ksp=[s][2s]2=4s3∴4×10−6=4s3∴s3=10−6⟹s=10−2Hence, the concentration of calcium ions =s=1×10−2 M

Calcium hydroxide, ${C a (O H)}_{2}$ , has a lower solubility in water than some of the other Group II hydroxides ( $K_{s p} = 4.0 \times 10^{- 6}$ at $25^{\circ} C$ ). In a saturated solution of calcium hydroxide at this temperature, what is the concentration of calcium ions?

The correct option is C $1.0 \times 10^{- 2}$
$C a (O H)_{2} ⟶ s C a^{2 +} + 2 s 2 (O H^{-})$
$K_{s p} = [s] [2 s]^{2} = 4 s^{3}$
$∴ 4 \times 10^{- 6} = 4 s^{3}$
$∴ s^{3} = 10^{- 6}$
$⟹ s = 10^{- 2}$
Hence, the concentration of calcium ions $= s = 1 \times 10^{- 2}$ $M$