Question

PartA.

Solid sodium sulfite is slowly added to 125 mL of a 0.0671 M calcium acetate solution. The concentration of sulfite ion required to just initiate precipitation is _____ M

Part B. Solid barium acetate is slowly added to 175 mL of a 0.0475 M ammonium carbonate solution. The concentration of barium ion required to just initiate precipitation is _____ M.

Answer 1

solution Part A Concentration of calciumion = Concentration of calcium acetate = 0.0671 M Caso 2 (2+ + so Ksp = [cat] [503² As we know Ksp for Caso = 6-8X150 cont of Ca2+ = 0.0671M Ksp = [ca²t] [50,?] 6.88769 = [0.0671] [50,-) so? = 6.80108 0.0671 Conc. of 50,? = 101X.10-6 M Conc 0.06M Ans. The concentration of sulfite ion required to just initiate precipitation is lolxto 'M

solution (Part B) concentration of carboneteion -Conc. of ammonium carbonate = 0.0475M Baloy == Bat +co Ksp = [Bat] [co; Rsp Ba Cos = 5:18169 Cone of CO² = 0.0475M Conc. of Bart = ? 5:1X10-9 = [8644] x 0.0475 Ba2+ = s. 18109 0.0475 = 107.368 X109 Conc. of Ba?t = 1.0738107 m just - Ans. The conc. of barium ion required to initiate precipitation is 1.07815?M.