Molarity Conversion

Question

If 38.17 mL of 0.1072 M NaOH is required to titrate a 15.00 mL sample of sulfuric acid, what is the molarity of the acid?

Equation: H2SO4 + 2 OH^1- = 2 H2O + SO4^2-

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Answer 1

H2SO4 + 2 NaOH ==> 2H2O + Na2SO4

1. Find moles of NaOH used in the titration: 0.03817 L x 0.1072 mole/L = 0.004092 moles NaOH
2. Calculate moles H2SO4 present: 0.004092 moles NaOH x 1 mol H2SO4/2 mol NaOH = 0.002046
3. Calculate molarity (mol/L) of H2SO4: 0.002046 moles/0.015 L = 0.1364 M