How many milliliters of 4.00 M NaOH must be added to 100.0 mL of .2000 M H2SO4 solution to completely neutralize the acid

Answer 1

Look at the correctly balanced equation for this neutralization reaction:

H₂SO₄(aq) + 2NaOH(aq) ==> Na₂SO₄(aq) + 2H₂O(l)

1). Calculate moles of H₂SO₄ present:

100.0 ml x 1 L/1000 ml x 0.2000 mol/L = 0.02 moles H₂SO₄

2). Calculate moles of NaOH needed to react with 0.02 moles H₂SO₄

0.0 2 moles H₂SO₄ x 2 moles NaOH/mol H₂SO₄ = 0.04 moles NaOH needed

3). Calculate volume of 4.00 M NaOH needed:

(x L)(4.00 moles NaOH/L) = 0.04 moles NaOH

x = 0.01 L x 1000 mls/L = 10.0 mls NaOH needed (3 significant figures bases on 3 s.f. in 4.00 M)