part B snd C emic Analysis DATA Trial 4 Massaf Basso, and paper, Mass of paper.

Question

part B snd C

emic Analysis DATA Trial 4 Massaf Basso, and paper, Mass of paper. 676 Muse of Baso, precipitate, issoles of Hasoo that reaowed volume of neal solution reactod,mL sml. -1 3m H:soul final solution M H sol stock solution, M Average lHasoal, initial soln, M valumenrku Determination of Aeld concentration Molarity of NaoEHoaqys 0 loom Trial 2 Trial 3 Trial 4 Initial NaOH buret reading, ml. 46. Final NaoH buret reading, ml. ll. volume of NaoHag used, mL 3s, L 30.7 72.s us: ou 0.01 Millimales of Hrsov titrated volume of final solution titrated, mL lun lon lHasol final solution, M soul stock solution, M. IH,soa, initial solution, M Average IH soil, initial soln, M "Calculated by taking the successive dilutions into account. ple Calculations

Explanation / Answer

Gravimetric and volumetric analysis

B. Gravimetric analysis of sulfate ion

BaSO4 ppt (g)              : 0.4698 g

BaSO4 (mmol)             : 0.4698/233.38 = 2 mmol

H2SO4 (mmol)             : 2 mmol

Volume reacted            : 5 ml

H2SO4 (M)                   : 2 mmol/5 ml = 0.4 M

C. Volumetric determination of acid concentration

2NaOH + H2SO4 --> Na2SO4 + 2H2O

NaOH (M)                 : 0.1 M

NaOH (ml) used       : 35.1

NaOH (mmol)           : 0.1 M x 35.1 ml = 3.51 mmol

H2SO4 (mmol)         : 3.51/2 = 1.755

Initial (ml) reacted    : 10

H2SO4 (M)              : 1.755 mmol/10 ml = 0.1755 M

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