Question

ad(1) arsenate is 4.00-10-36 Post Lab Problem 1 (5 points). The solubility product for lead(II) arsenate is What is the aqueous molar solubility of lead(II) arsenate: Pb (AsO4)2) 3Pb2+ (aq) + 2Aso (a). K. - 4.00-10-35 Round off your final answer to 3 sig. figs.. and enter it in the box provided with correct units Answer: The molar solubility). of lead(II) arsenate is): Spb (Aso), Post Lab Problem 2 (5 points). One liter of a saturated solution of magnesium arsenate contains 1.577 10 g of Mg, Aso),(aq). What is the solubility product for magnesium arsenate is: Mg, (Aso,)) 3Mg?(aq) + 2Asota). Ko = ? Round off your final answer to 3 sig, figs., and enter it in the box provided Answer: The solubility product of). K magnesium arsenate is Ksp =

Answer 1

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Dali 1 Page No Pba (AsOy), = 3Pb2+ + 2 As Odde 35 25 solubility per molecule. Here s' is • ksp = [Pb2+33 [ As ,3-3? 4.00 x 10-36 = (35)3 (25)2 4.00 x 10-36 = 108.55 ... s: (4.00% 10-36)'s 108 = 3.26 X 10 -8. :S Pba (Pob AsQu2 = 13.26 x 10+8 Mg3 (As O4)₂ (5) F 3 Mg2+ (aq) + 2 AsOy 3- Mass of Mg 3 (& As Oy ), dissolved = 10577x10-2g. Molar mass mg, (AsOy), - 350.7 g/mol i moles of Mg, (As Oy/₂ = mass Molar mass = 10577x10-2 350-7 2 4049 7x10-5 mol Volume of solution - 1 oi Molarity = 4.997x10-5 M. [Mg 2+] = 3x [Mg, (AsOy)2 ] = ooo 1•35 x 10-4M [e Asto [[As Oy),-) = 2 x [Mg, (AsOy)2 ] = 8.99x10-5M Ksp = [Mg 2+ ] 3 [As Oy 3-7² Seanned with = (135x10-4)3 ( 8.99x10-5)2 = 1.99x10-2011 CamScanner Ans