Question

Ksp = 2.5x10-13 for Pb(103)2 at 25 °C. Calculate the molar concentration of iodate ions in a saturated lead(II) iodate solution at 25°C using the assumption that the solution is ideal -- i.e. the activity coefficients are 1. (Your answer should be precise to three sig figs.) Submit Answer Tries 0/5 Still assuming an ideal solution, what mass of Pb(103)2 would be dissolved in 100. mL of saturated solution at 25 °C? (Your answer should be precise to three sig figs. Be sure to use accurate atomic weights.) Submit Answer: Tries 0/5 Using activity coefficients Y Pb2+ = 0.37 and 710,- = 0.775, calculate the maximum mass of Pb(103)2 which can dissolve in 100 mL of 0.100 M KIO3? Submit Answer Tries 0/5

Answer 1

(o Polio???) a Potal + 250 Solubility of Phlig then. - is I molar Cast222 S (0g) 225 <<e CestL Јо 2.54 1013 = (s) (25)? 453 2 2-5x1013 2) 523 2.5x163 2 3-97x105 m. 400 x 105 m Ciod a 2 25 2x3-97x105m 1o-0000794 m 7-94 x 10 m moles mole tooomt . so in 1000 mL solution - 3-97 105 moles dissolved in 100 mL solution ? 2 3-97x 106 mole. пCAss of eЬСГо), z of Poly molar mais moles in 100 ml x 2 3.97X106 moles (553-00537) 20-00221 9 22-24x768] Қце і ары оо- Prepte. Cebt?) Za-ZC29-32 Roy

& Io (dissoclate competel) o. 100m KIZ KIG kt so [Ig) 20-loom Pb(10320) = pbt2 t 200 Solublinys 0-100 +25 0-100t2s U & neglect us as ksp is very less (25 cca o 1oom) Ksp ? Pesti (Potz) (72) [10g ? 25x10 2 0-3785 x (0-775)2 (0-100)? @z) s 2 1-12am toto miles Solubity 2 1-12 445 x 1010 moles ooo 1000 ml 2 1.12495 x 10" moles 100mL mass of Pb (10) a moles in loom & molar mass z 1-12495xloll moles x 557-00By 9 mo 216-27 x 109 g