The pH of an aqueous NaOH solution is 12.83. What is the hydrogen ion concentration of this solution?  
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    Use either of these formula and plug it into the calculator. 
 
[H+] = Inverse log - 12.83
 
or
 
pH = -log[H+]
 
the answer should be 1.479 x (10^-13)
      [H+] = Inverse log - 12.83
or
pH = -log[H+]
the answer should be 1.479 x (10^-13)
