Answer : The [tex]OH^-[/tex] concentration is, 0.0316 M
Explanation :
pH : It is defined as the negative logarithm of hydrogen ion concentration.
First we have to calculate the pOH.
[tex]pH+pOH=14\\\\pOH=14-pH\\\\pOH=14-12.50=1.5[/tex]
Now we have to calculate the [tex]OH^-[/tex] concentration.
[tex]pOH=-\log [OH^-][/tex]
[tex]1.5=-\log [OH^-][/tex]
[tex][OH^-]=0.0316M[/tex]
Therefore, the [tex]OH^-[/tex] concentration is, 0.0316 M
