MCQ
pH of water is 7 at $25^{\circ} C$. If water is heated to $80^{\circ} C$, it's pH will :
- ✓Decrease
- BRemains the same
- C$H ^{+}$concentration increases, $OH ^{-}$concentration decreases
- DIncrease
✓
Answer
Correct option: A.
Decrease
(A)
With increase in temperature, $K _{ w }$ of water increases So, degree of dissociation of water increase $\therefore pH$ as well as pOH of water decrease.
With increase in temperature, $K _{ w }$ of water increases So, degree of dissociation of water increase $\therefore pH$ as well as pOH of water decrease.
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