Question

the oh- concentration of the solution is 1.0*10 ^ -10 then the solution is neutral? how?

Answer 1

Answer:

Phenolphthalein changes colour from colourless to pink in pH>8.

So lets make the solution alkaline and we have a pink solution. Pour this solution in two beakers equally.

Now take the acid and neutral solutions and start pouring equal volumes of the these two in the two beakers of pink solution.

For acidic solution the mixture will neutralise more quickly for the same volume of acidic and neutral solutions.

Note: The experiment will depend on the nature of acid, base and their concentration.

hope its helpful

Answer 2

Water is amphiprotic; in pure water, a few molecules act as bases and some as acids. This is autoionisation.

The equilibrium expression for this process is

Kw = [H3O+][OH-] = 1.0 x10-14 at 25degrees

Aqueous solutions

If a solution is neutral [H3O+] = [OH-]

If a solution is acidic [H3O+] > [OH-]

If a solution is basic [H3O+] < [OH-]

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