How much .025M NaOH is needed to reach the equivalence point in a titration of 40mL of .01M HCl?
A. 160mL
B. 40mL
C. 25mL
D. 16mL
D
HCl is a strong acid; NaOH is a strong base. Both ionize completely in water. Therefore, it is necessary only to find the number of moles of HCl present (which equals the number of moles of hydronium ions) and calculate what volume of NaOH contains this number of moles of NaOH (and thus of ions).