First slide

PH scale, PH of strong acids and strong bases

Question

The hydrogen ion concentration of the oceans is about $2 \times 10^{- 9}$ M What is the pH?

Easy

A

8.85
B

9.3
C

7.85
D

8.7

Solution

$pH = - \log_{10} [H^{+}]$
=−log[2×10⁻⁹]=−(log2−9)=9−log2=9−0.301=8.7.

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