Question

477.1 mg of KHP is dissolved in approximately 50 mL of de-ionized water in a 250 mL. Erlymeyer flask and titrated with an NaOH solution. The titration required 25.31 mL to reach the phenolphthalein endpoint. The NaOH solution was also used to titrate 25.00 mL of a dilute HCI solution. The dilute HCI solution required 27.73 mL to reach the phenolphthalein endpoint. Determine the concentrations of the NaOH and the HCI solutions. Select one: a. [NaOH) 0.084 M, [HCI) 0.096 M b. [NaOH) 0.134 M, [HCI 0.173 M c. [NaOH] 0.092 M, [HCI) 0.102 M d. INaOH] 0.102 M, [HCI 0.092 M

Answer 1

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Molarity here of kip solution: W X 1000 (mw) v W= 4:17. 1mg = 477-1 X10-3 Mw=204.22 genol Ve sont Molarity = 477 • 1x10x 1000 m (204.22) (50) = 0.0469M ~ 0.0479. . for KHP - Novo let Mi= 0.047M u=50ml. 2= 25.31 m. Moof raoH=? (M, V. (Ma V.2) Naoti CHE -0.092 M. 0.047 50 25.31 Natt va Mclarity of Malt=0.092 m 1 for. tich V = 25.0ml M = ? V₂ = 27.73 ml Mae 0.092 (mv) = (M2.v2). Maot . 9 = - Mavz V 0.09 2 x 27.73 25 + (M.) Hg = Mavz Molarity of Hels 0.102 m.) & correct option ① (Naoth = 0.092M , [ci] = 0.10209