What is the pH of 0.10 mol.dm^(-3) sodium hydroxide solution, NaOH?
To calculate the pH of a solution/compound, we can use the equation: pH = - log10[H+]Within the sodium hydroxide solution, you would observe Na + and OH - ions so in order to find the concentration of H+ ions, we can use the Kw equation as it has both H+ and OH - ions within it.Each mole of NaOH gives 1 mole of OH- ions in solution therefore the concentration of OH- ions would also be 0.1 mol.dm-3.Using the Kw equation, you find that the concentration of H+ ions to be 1.00 x 10-13 mol.dm-3. Now that we have the concentration of H+ ions, we can use the equation to calculate the pH: pH = - log10[1.00 x 10-13] , therefore the pH of the sodium hydroxide solution is 13.
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