Example 4, find the concentration of OH- wastes resulting from the NaOH 10.0 grams dissolved in a solution of 0.2 dm3 (Na = 23, O = 16, H = 1) How did the number of moles of NaOH = = 0.25 mol 0.2 solution. dm3 meat of NaOH = 0.25 molar solution of 1 dm 3 with NaOH = = 1.25 mol / L , so the solution is concentrated, 1.25 mol / L and reaction disintegration of NaOH as follows NaOH (aq) Na + (aq) +. oh (AQ) one twenty-five 1.25 mol mol mol 1.25 Thus, the concentration of OH- = 1.25 mol / L.
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