posted by Katie .
25 mL of NaOH 0.16 M is added to 50 mL of 0.1 M HCl.
What is the concentration of hydroxide ions in the solution?
mols HCl = M x L = ?
mols NaOH = M x L = ?
Subtract. Excess mols = either mols HCl or NaOH, then determine OH or H^+ from that.