a 25.00 ml sample of am unknown HClO4 solution requires titration with 22.62 mL of 02000 M NaOH to reach the equivalence point. what is the concentratio of th eunknown HClO4 solution?

Question

a 25.00 ml sample of am unknown HClO4 solution requires titration with 22.62 mL of 02000 M NaOH to reach the equivalence point. what is the concentratio of th eunknown HClO4 solution?

Answer 1

HClO4 + NaOH ==> NaClO4 + H2O

moles of NaOH used = 0.02262 L x 0.0200 mol/L = 0.0004524 moles

moles HClO4 present = 0.0004524 moles NaOH x 1 mole HClO4/mole NaOH = 0.0004524 moles

concentration of HClO4 = 0.0004524 moles/0.02500 L = 0.018096 M = 0.01810 M