First slide

PH of strong acids and strong bases

Question

The pH of 40 ml of a 0.02 M HCl will not be changed by adding

Moderate

Solution

Final concentration of H⁺ ions,
[H⁺] =
$\frac{40\times 0.02+36\times 0.02}{40+36}=\frac{0.8+0.72}{76}$
$=\frac{1.52}{76}$
Initial P^H = 2-log2 = 1.7
Final P^H = 2-log2 = 1.7

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