General Chemistry

Question

If you have 214.1 mL of a 1.085 M solution of sodium hydroxide, how many mL of a 0.950 M solution of sulfuric acid do you need in order to neutralize it?

 _____ mL   

Answer 1

Write the correctly balanced equation for the reaction:

H₂SO4 + 2NaOH ==> Na₂SO₄ + 2H₂O ... balanced equation

Next, find the moles of NaOH present:

214.1 ml x 1 L / 1000 ml x 1.085 mol / L = 0.2323 mol NaOH present

Next, find the moles of H₂SO₄ needed using the mol ratios in the balanced equation:

0.2323 mol NaOH x 1 mol H₂SO₄ / 2 mol NaOH = 0.11615 mol H₂SO₄ needed

Finally, calculate the volume of 0.950 M needed to supply this many mol H₂SO₄:

(0.950 mol / L) (x L) = 0.11615 mol

x = 0.122 L = 122 ml