Question

Hydrochloric acid(75.0 ml of 0.250 M) is added to 225.0 ml of 0.0550 M Barium hydroxide solution. What is the concentration of the excess H+ or OH- ions left in this solution?

Answer 1

2HCl + Ba(OH)2 ==> 2H2O + BaCl2
mols HCl = M x L = ?
mols Ba(OH)2 = M x L = ?
Determine the limiting reagent and go from there. Post your work if you get stuck and I can help you through.

Answer 2

mols HCl= 0.01875
mols Ba(OH)2 = 0.012375