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Q.

The pH of which of the following solution is relatively high?

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a

0.01M NaOH

b

0.01M Ba(OH)2

c

0.01M H2SO4

d

0.01M NaCl

answer is B.

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Detailed Solution

 To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per litre (molarity). The pH is then calculated using the expression: pH = - log [H3O+].

 The pH of 0.001M Ba(OH)2 solution is 11.3

The pH of 0.001M of NaOH solution is 11

The pH of 0.001M of NaCl solution is 7

The pH of 0.001M of H2SO4 solution is 2.69. So, the pH of 0.001M Ba(OH)2 solution is 11.3 and is relatively high.

So, the correct option is (B).

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