Question

Experiment 6. Acid-Base Titration Name Person # Teaching Assistant Darc Section Code Data Sheet * Unknown is a Diprotic Acid Table 6.1. Mass and volume data for titration of primary standard acid and unknown acid with sodium hydroxide. M -1 Trial 1 T rial Trial 3 Mass of weighing paper (g) 0,3898 10.3794 0.4041 Mass of weighing paper and oxalic acid, H,C,0,2H,0 (g) 0.5828 10.5634 0.5947 Initial reading of buret (mL) 2.59 0.00 oslo Final reading of buret (mL) 24. 28 Trial 1 0.25 Unknown Number Proposed mass of unknown acid sample for citration (8) Number of reactive protons per molecule of unknown acid 21.42 Trial 2 0.25 21.01 Trial 3 0.25 0.3958 0.3986 0.3943 Mass of weighing paper (g) Mass of weighing paper and unknown acid g) Initial reading of buret (mL) 10.6427 10.6495 10.6458 0.10 0.20 1 0.71 33.11 Final reading of buret (mL) 30.51 30.36€

Answer 1

Id we know, mahnituromo - males of solute (med) litee of solution. (4) Helle males of Cont] = 0,56 x 104 if, is uit Prepare at Then Modarity a goSGR104 9.56* 104 cm) B) For unfernown acud NaOH consumed = (30.34 -0.20) mL = 30,14 mL 22,4 L NOOH contains 1 mode. 30.14 inon L NaOH contains 30.1481 1000 XD214 mode. = 1,34 x 10 move. as 1:34x10 s mode NaOH reacted wuitsch untenown aculd. • To determine 'b'; & e Paut volume of unpenson Acud is needed. Then I can put uit on, Voxb. = NexBR Ni = volume of anknown Acud . a) Must be needed To complete sia strength of unknown Acud. The Auswess Na volume of NaOH = 30,14 mL. 32 = stolength of NaOH = 9.568104 (M)