Question

How many moles of `NaOH` must be removed from 1 litre of aqueous solution to change its `pH` from 12 to 11
A. `0.009`
B. `0.01`
C. `0.09`
D. `0.1`

Answer 1

`{:(Initial,"final"),(pH=12,pH=11),([H^(+)]=10^(-12)M,[H^(+)]=10^(-11)M),([OH^(-)]=10^(-2)M,[OH^(-)]=10^(-3)M),("initial no of mole of" OH^(-)=10^(-2),"final No of moles of" OH^(-) =10^(-3)):}`