First slide

PH of strong acids and strong bases

Question

At 298 K, equal volumes of 0.15M Sulphuric acid and 0.3M Potassium hydroxide are mixed. $p^{H}$ of resultant mixture is

Moderate

A

1.301
B

10.301
C

11.699
D

7

Solution

$V_{a} N_{a} = 1 (0.15 M) 2 = 0.3; V_{b} N_{b} = 1 (0.3 M) 1 = 0.3; [H^{+}] = \frac{0.3 - 0.3}{2} = zero; p^{H} = 7$

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