What is ph value ? what is the ph value of water
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What is ph value ? what is the ph value of water

[From: ] [author: ] [Date: 11-05-16] [Hit: ]
Completely neutral.-7.......

H2O ----> H+ + OH-

Dissociation of water is a constant at a given temperature and a has value of 1.0 x 10^-14 at room temperature.

now dissociation constant (Kd) of above equation would give you the following:

Kd = [H+][OH-]/[H2O]

now concentration of water is a constant [H2O] = 55.18 if am not mistaken...

So you have another equation which would give you the following

Kw = [H+][OH-]

As concentration of water being a constant it would never change

Also from equation above you would notice [H+] = [OH-]

So i can simplify my equation as follows [H+]^2 = 1.0 x 10^-14
So, [H+] = 1.0 x 10^-7


now more importantly another definition of pH would be the negative logarithm to base 10 of the concentration of H+ ions in a solution.

From the second definition you obtain the formula pH = -log[H+]

So for water, pH = -log[1.0 x 10^-7]
pH = 7.

THEREFORE, pH OF WATER = 7

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pH is a measure of the acidity or basicity of a liquid.

Pure water is neutral, with a pH near 7.0 at 25 °C (77 °F).

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IT determines the acidity/basicity of solutions by measure H+ and OH- concentrations. ph of water is 7

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Pure water would be 7. Completely neutral.

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7.0 (neutral)

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pH = -log[H+]

pH of neutral water is 7
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