Question

The concentration of a certain sodium hydroxide solution was determined by using the solution to titrate a sample of potassium hydrogen phthalate (abbreviated KHP). KHP is an acid with one acidic hydrogen and a molar mass of 204.22 g/mol. In the titration 34.67 mL of the sodium hydroxide solution was reuired to react with 0.1082. g KHP. Calculate the molarity of the sodium hydroxide.

Answer 1

NaOH + KHP ==> NaKP + H2O
Note that 1 mol NaOH = 1 mol KPH.

mols KHP = grams/molar mass
mols NaOH = mols KHP.
M NaOH = mols NaOH/L NaOH. You now mols and L, solve for M

Answer 2

Thank you Dr. Bob

Answer 3

.4407 M