1.

The hydroxide ion concentration of a solution is 1 × 1011M. What is the pH of the solution?

Answer»

[OH-] = 1 × 10-11 M

pOH = – log[OH-]

= – log[1 × 10-11

= -log101 – log1010-11

= -(-11) log1010 = 11

pOH = 11

pH + pOH = 14

pH = 14 – 11

pH = 3



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