First slide

PH of strong acids and strong bases

Question

The number of OH^– ions in 1mL of solution having p^H = 4 is

Moderate

A

10^-4
B

10^-10
C

6.02 x 10¹⁰
D

6.02 x 10¹³

Solution

[OH^-] = 10^-10
Number of OH^- ions in 1 ml of solution
= 10^-10 x1 x10^{-3 x}6.023 x10²³
= 6.023 x10¹⁰

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