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The pH of the pure water at $$25^\circ\text{C}$$ is 7. The pH of the solution after addition of 1 gm of KCl per liter of water is _________
Correct Answer: 7
KCl is the salt of a strong acid (HCl) and a strong base (KOH), so neither ion hydrolyses. The solution stays neutral and its pH remains 7.
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