Calculate the volume of a 0.225 M solution of potassium hydroxide,KOH,required to react with 0.215g of acctic acid,CH,COOH=KCH,COO+H2O.

Answer 1

mols acetic acid (HAc) = grams/molar mass = ?
mols KOH = mols HAc (look at the coefficients in the balanced equation.
M KOH = mols KOH/L KOH. You know mols and M, solve for L and convert to mL if needed.

Answer 2

0.1 ml