Chemistry homework help

Question

What volume of 0.0100 M barium hydroxide, Ba(OH)2, solution is needed to completely neutralize 10.0 mL of 0.0200 M hydrochloric acid?

Answer 1

Ba(OH)₂ + 2HCl ==> BaCl₂ + 2H₂O ... balanced equation for neutralization reaction

moles HCl present = 10.0 ml x 1 L/1000 ml x 0.02000 mol/L = 0.000200 moles HCl

moles Ba(OH)₂ needed = 0.000200 mol HCl x 1 mol Ba(OH)₂ / 2 mol HCl = 0.000100 moles Ba(OH)₂ needed

volume Ba(OH)₂ needed: 0.0100 mol/L (x L) = 0.000100 moles; x = 0.0100 L = 10.0 mls Ba(OH)₂ needed