How many milliliters of 0.02 m hcl are needed to react completely with 100 ml of 0.01 m naoh?
a) 200 ml
b) 100 ml
c) 75 ml
d) 50 ml
e) 25 ml

The reaction of HCl and NaOH is HCl + NaOH = NaCl + H2O. So the mole number of HCl and NaOH is equal. So the volume of HCl =0.01*0.1/0.02=0.05 L =50 ml. So the answer is D).

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