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(a). What does the pH of a solutio signi...

(a). What does the pH of a solutio signify? Three solutions A, B and C have pH values of 6,4 and 10 respectively. Which of te solutions is highly acidic?
(b). A farmer has found that the pH of soil in his fields is 4.2. Name any two chemical materials which he can mix with the soil to adjust its pH.

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