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Q.

The concentration of hydrogen ion in a sample of soft drink is 3.8×10-3M. What is its pH?

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a

4..32

b

5.12

c

3.31

d

2.42

answer is D.

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Detailed Solution

pH=-log3.8×10-3=-log(3.8)+log10-3=-{(0.58)+(-3.0)}=-{-2.42}=2.42Therefore, the pH of the soft drink is 2.42 and it can be inferred that it is acidic.
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