A solution of sodium carbonate in water has a $p H$ value :

> 7

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< 7

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Equal to zero

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Solution

The correct option is D $> 7$
$N a_{2} C O_{3} \to$ sal tof weak acid and salt strong base
$∴ C O_{3}^{2 -} + H_{2} O \to H_{2} C O_{3} + 9 O H^{-}$
$∴ B s a s i c p^{H} > 7$ .

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Similar questions

p^{H}

(a) A solution has a $p^{H}$ of 7. Explain how you would :

(i) increase ist $p^{H}$ ; (ii) decrease its $p^{H}$ ;

(b) If a solution changes the colour of litmus from red to blue, what can you say about its $p^{H}$ ?

= 7

25^{o} C .

p H = 7

p H

7.

p H

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