Chemistry

For which pH change is there the maximum increase in acidity?
Initial pH Final pH
1. 1 3
2. 2 6
3. 3 1
4. 6 2

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Reason — According to the pH scale, lesser the pH more is the acidity. When pH decreases from 6 to 2, the amount of H⁺ increases 10,000 times.

pH= −log₁₀ [H⁺ ] ⟶ [H⁺ ] = 10^-pH

Initial [H⁺] = 10^-6 = 0.000001 mol/L
Final [H⁺] = 10^-2 = 0.01 mol/L

Change: $\dfrac{0.01}{0.000001}$ = 10,000 times more acidic

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