Question

11. 12. Potassium hydrogen phthalate (KHP, KHC,H,O,) is also a good primary standard. 20 mL of NaOH was titrated with 0.600 M KHC,H,O, solution. The data was graphed and the equivalence point was found when 15.5 mL of the standard 0.600 M KHP solution was added. The reaction equation is: NaOH(aq) + KHC2H4O2(aq) → KNaC3H.O. (aq) +H2O (0) a. What is the molar ratio of NaOH:KHC,H,04? b. What is the molarity of the NaOH solution? 13. Calculate the amount of sodium hydroxide you will need to make 250 mL of a 0.1 M solution of sodium hydroxide.

Answer 1

Với 6 K + C , > ENCF + , the inclas Bretto of NQOH to KHC9H204 ig -tid 9.3 inmole mole of RHP: In ole of NaOH = 15.5 * 0.6 = 9.3 mmolo (NGORJ = 0.465 m 9.3x10-3 20X10-3 molarity = moles /volume Inele of NAOH = 0.1* 250 - 0.025 mole 1000 amount of NAOH = 0.025 x 40 = I am