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Question

A solution of 10.0 mL of H₂SO₄ is titrated with 40 mL of s standard solution of 0.005 M NaOH. Calculate the concentration of H₂SO₄. The equation is H₂SO₄ + 2NaOH -----> Na₂SO₄ + 2H₂O.

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Answer 1

No additional data is needed.

moles NaOH needed for neutralization = 40 ml x 1L/1000 ml x 0.005 mol/L = 0.0002 moles NaOH

moles H2SO4 present = 0.0002 mol NaOH x 1 mol H2SO4 / 2 mol NaOH = 0.0001 moles H2SO4 present

Concentration of H2SO4 = 0.0001 moles/0.01 L = 0.01 M