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Uses of Slaked Lime

Lime water is...

Question

Lime water is a solution of:

C a (O H)_{2}

in water

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C a C l_{2}

in water

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NaOH in water

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NaCl in water

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Solution

The correct option is A $C a (O H)_{2}$ in water
Limewater is the common name for a diluted solution of calcium hydroxide. Calcium hydroxide, $C a (O H)_{2}$ , is sparsely soluble in water. Pure limewater is clear and colorless, with a slight earthy smell and an alkaline bitter taste of calcium hydroxide. Limewater is prepared by stirring calcium hydroxide in pure water, and filtering off the excess undissolved $C a (O H)_{2}$ . When excess calcium hydroxide is added to limewater, a suspension of calcium hydroxide particles results, giving it a milky aspect, in which case it has the common name of milk of lime.

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C a O

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

C a (O H)_{2}

p H

C a = 40, O = 16, H = 11

Suspension of slaked lime in water is known as
(a) lime water (b) quick lime (c) milk of lime (d) Aqueous solution of slaked lime

C a C l_{2} \cdot 6 H_{2} O

3.5 K c a l m o l^{- 1}

C a C l_{2} (s) + 6 H_{2} O (l) ⟶ C a C l_{2} \cdot 6 H_{2} O (s)

Δ H

- 23.2 K c a l

C a C l_{2}

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

C a (O H)_{2}

5.5 \times 10^{- 6}

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