Question

at a particular temperature, the Kw of a neutral solution was equal to 4x 10-14

Calculate the concentration of [H3+ O ] and [OH- ]

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Answer 1

Answer:

Concentration of [H3O+]  = 2.0 x 10^-7

Concentration of [OH-]  = 2.0 x 10^-7

Explanation:

Here we are given that the given solution is neutral. For neutral solutions, it is supposed that that the concentration of cations and anions are same which can be stated as

[H3O+] = [OH-]

We are given that Kw = 4.0 x 10^-14  

Kw = [H3O+][OH-]

since [H3O+] = [OH-]

Kw = x ^2

so x = square root 4.0 x 10^-14

x = 2.0 x 10^-7

Concentration of [H3O+] = 2.0 x 10^-7

Concentration of [OH-]  = 2.0 x 10^-7