Question 1103114
pH is Negative Logarithm of the Hydronium Ion Concentration as Moles per Liter.


{{{pH=-log(10,M)}}}-------------usually in base-ten


Your example is  {{{pH=2.23=-log(10,M)}}} and you want to find M.
These days you can simply use a calculator for {{{10^(-2.23)}}} for hydronium ion concentration in moles per liter.