MCQ
A solution of an acid has $pH = 4.70.$ Find out the concentration of $OH^-$ ions $(pK_w = 14).$
- ✓$ 5 \times 10^{-10} $
- B$ 6 \times 10^{-10} $
- C$ 2 \times 10^{-5} $
- D$ 9 \times 10^{-5} $
✓
Answer
Correct option: A.
$ 5 \times 10^{-10} $
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