Question

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Answer 1

Hey

Here is ur answer......

The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as measure the acidity or basicity of the solution.

water of city B is more acidic than water of city A

Answer 2

pH is defined as the hydrogen ion concentration of a solution.

Mathematically it is defined as---
The negative logarithm of hydrogen ion concentration

pH= -log[H+]


It ranges between 0 to 14
lesser pH will be more acidic but below 7.
water of city A has pH 6 and water of city B has pH 5

So, water of city B is more acidic.

Hope it is useful