1The titration of 09697 g of potassium acid phthalate KHP MM

1.The titration of 0.9697 g of potassium acid phthalate (KHP) (MM = 204.227 g/mol) requires 42.74 mL of NaOH solution. What is the concentration of the NaOH solution?

Solution

Potasium acid phthalate is a Primary Standard , it is used for the standardisation of secondary standard solutions i.e NaOH solution

weight of KHP, Wt = 0.9697 gr

Molecular weight of KHP, Mwt = 204.227 g/mol

Volume of NaOH Solution, V = 42.74 ml

Concentration of NaOH = ?

MOLARITY = Wt / Mwt * 1000/v(ml)

              M = 0.9697 / 204.227 * 1000 / 42.74

Concentration of NaOH = 0.1111 M