What is pH? Explain pH range of acidic and basic solutions.

1.	What is pH? Explain pH range of acidic and basic solutions.
Answer» The negative logarithm of hydrogen ion concentration in a solution is calledpH of that solution. Let us assume that concentration of hydrogen ion in a solution is 1 x 10^{- 4} gm mole L^-1 . The pH of this solution can be calculated as follows: pH = -log [1 x 10^-4 ] pH = 41og₁₀10 pH = 4 pH range is between 0 to 14. The pH of a neutral solution is 7. All basic solutions have pH more than 7. All acidic solutions have pH less than 7.

Answer»

The negative logarithm of hydrogen ion concentration in a solution is calledpH of that solution.

Let us assume that concentration of hydrogen ion in a solution is 1 x 10^{- 4} gm mole L^-1 .

The pH of this solution can be calculated as follows:

pH = -log [1 x 10^-4 ]

pH = 41og₁₀10

pH = 4

pH range is between 0 to 14. The pH of a neutral solution is 7.

All basic solutions have pH more than 7.

All acidic solutions have pH less than 7.

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