Ionic EquilibriumHard
Question
pH of water is 7.0 at 25oC. If water is heated to 70oC, the:
Options
A.pH will decrease and solution becomes acidic
B.pH will increase
C.pH will remain constant as 7
D.pH will decrease but solution will be neutral
Solution
On heating water Kw increases and thus pH scale for neutrality changes from 7 to some lower value, i.e., 6.8 or 6.9 depending upon Kw values.
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