Question

at a particulat temperature, a smaple of pure water has a Kw of 7.7x10-14. what is the hydroxide concentration of this sample

Answer 1

Answer: The hydroxide concentration of this sample is
`3.85* 10^(-7)`

Step-by-step explanation:

When an expression is formed by taking the product of concentration of ions raised to the power of their stoichiometric coefficients in the solution of a salt is known as ionic product.

The ionic product for water is written as:

`K_w=[H^+]* [OH^-]`

`7.7* 10^(-14)=[H^+]* [OH^-]`

As
`[H^+]=[OH^-]`

`2[OH^-]=7.7* 10^(-14)`

`[OH^-]=3.85* 10^(-7)`

Thus hydroxide concentration of this sample is
`3.85* 10^(-7)`