(i) What is the purpose of the pH scale?
(ii) What is the pH of pure water?
(iii) A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of
(a) a soluble of A?
(b) a solution of B?

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Solution

(i) The purpose of the pH scale is to determine the nature (acidic, basic or neutral) of a given solution.
(ii) The pH value of pure water is 7. Pure water is neutral in nature.
(iii) On the pH scale, bases (or alkalis) have a pH value greater than 7, while acids have a pH value below 7. The pH value of neutral solutions is 7.
(a) A solution of A will have a pH value less than 7 as compared to pH of water.
(b) A solution of B will have a pH value greater than 7 as compared to pH of water.

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(i) What is the purpose of the pH scale? (ii) What is the pH of pure water? (iii) A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of (a) a soluble of A? (b) a solution of B?

(i) What is the purpose of the pH scale?
(ii) What is the pH of pure water?
(iii) A is a soluble acidic oxide; B is a soluble base. Compared to the pH of pure water, what is the pH of
(a) a soluble of A?
(b) a solution of B?