A student titrates an unknown amount of KHP with 20.46 mL of a 0.1000M NaOH solution.What was the mass of KHP was titrated by the sodium hydroxide solution

Question

Molar mass of KHP is 204.22 

KHP has one acidic hydrogen 

Answer 1

Write a correctly balanced equation:

HC₈H₄O₄K + NaOH ==> C₈H₄O₄KNa + H₂O

moles of NaOH used = 0.02046 L x 0.1000 moles/L = 0.002046 moles NaOH = 0.002046 moles KHP (1:1 mole ratio from balanced equation).

Mass KHP = 0.002046 moles KHP x 204.22 g/mole = 0.41783 grams = 0.4178 g (to 4 significant figures)