Potassium hydrogen phthalate, KHC 8 H 4 O 4 , is used to standardize solutions o

Question

Potassium hydrogen phthalate, KHC8H4O4, is used to standardize solutions of bases. The acidic anion reacts with strong bases according to the following net ionic equation:

If a 0.926-g sample of potassium hydrogen phthalate is dissolved in water and titrated to the equivalence point with 53.01 mL of KOH(aq), what is the molar concentration of the KOH?

If 50.00 mL of the KOH(aq) solution is added to an empty beaker and titrated to the equivalence point with 37.62 mL of HBr(aq), what is the molar concentration of the HBr?

Explanation / Answer

a)

0.926 g/ 204.22 g/mol = 0.00453 mol KHC8H4O4

0.00453 mol = 0.05301 L x CKOH

CKOH = 0.08554 mol/L

b)

50.00 mL x 0.08544 mol/L = 37.62 mL x CHBr

CHBr = 0.1137 mol/L

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.