NaOH (s) + H_{2}SO_{4} (aq) → Na_{2}SO_{4} (aq) + H_{2}O

Consider the unbalanced equation above. A 0.911 g sample of impure NaOH was dissolved in water and required 29.3 mL of 0.226 M H_{2}SO_{4} solution to react with the NaOH in the sample. What was the mass percent of NaOH in the sample?

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