30 ml of 0.1 M HCl is added to 70 ml of 0.1M NaOH calculate PH of solution (nearest integer) ___

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30 ml of 0.1 M HCl is added to 70 ml of 0.1M NaOH calculate P^H of solution (nearest integer) ____

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answer is 13.

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Detailed Solution

$HCl + NaOH \to {NaCl + H}_{2} O$

Milli equivalent

$0.1 \times 30 0.1 \times 70$

$= 3 = 7$

Reacted 3 3 3

Remained 0 4 3

Basic nature

$NV= 4 \Rightarrow N = \frac{4}{30 + 70} = 4 \times 10^{- 2}$

$P O H = - \log 4 \times 10^{- 2} = 2 - \log 4$

= 2 – 0.6030 = 1.39

PH = 14 – 1.39 = 12.6

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