Question

(i) What is pH' scale? Explain briefly. (ii) What is the 'pH' of pure water and that of rainwater? Explain the difference.​

Answer 1

★ Answer :

$\implies$ pH scale is used to measure that the solution is acidic or basic. We can measure the the value of solutions from 1 to 14 scales. If the pH value is from 1 to 7 then it is acidic and if the value of pH is from 7-14 it is basic

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$\implies$ The pH of the pure water(Distilled water) is 7 which means it is a neutral( neither acidic nor basic) solution but the oH of the rainwater is 5 to 5.5 means it is acidic.

Answer 2

Explanation:

1) pH scale: The pH scale is logarithmic and inversely indicates the concentration of Hydrogen ions in the solution.

• 2) Pure water is neutral in nature and has a 7 pH value while rainwater is slightly acidic in nature and its pH is 5.6.
• Rainwater contains dissolves carbon dioxide which reacts with water and forms carbonic acid hence acidic in nature.