SATHEE: Equilibrium - Result Question 39

Equilibrium - Result Question 39

####41. Which of the following salts will give highest $p H$ in water?

[2014]

(a) $K C l$

(b) $N a C l$

(d) $C u S O_{4}$

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Solution:

(c) $N a_{2} C O_{3}$ is a salt of strong base $(N a O H)$ and weak acid $(H_{2} C O_{3})$ . On hydrolysis this salt will produce strongly basic solution. i.e. $p H$ will be highest $(p H > 7)$ for this sotluion. Others are combination of $K C l =$ Strong acid + Strong base

$a r r o w$ neutral solution $(p H \approx 7)$

$N a C l =$ Strong acid + Strong base

$a r r o w$ neutral solution $(p H \approx 7)$

$C u S O_{4} =$ Strong acid + wake base

$a r r o w$ Acidic solution $(p H < 7$ )

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Equilibrium - Result Question 39

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