Hard water is passed through an ionic exchange resin containing $- S O_{3} H$ group. The outcoming water is free of the following ions_________.

C l^{-}

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N O_{3}^{-}

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H_{3} O^{+}

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C a^{+ 2}

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Solution

The correct option is D $C a^{+ 2}$
Ion exchange resin which contain $S O_{3} H$ can remove $C a^{+ 2}$ ion from the water.

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Similar questions

R C O O H

R C O O N a

R S O_{3} N a

R H_{2}

C a^{2 +}

R H_{2} + C a^{2 +} \to R C a + 2 H^{+}

1 L

R H_{2}

p H = 2

C a^{2 +}

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