Question

40.

(a) If the molar solubility of Cu₃(PO₄)₂ at 25 ^oC is 1.67e-08 mol/L, what is the K_sp at this temperature?

K_sp =




(b) It is found that 0.000165 g of Mg₃(PO₄)₂ dissolves per 100 mL of aqueous solution at 25 ^oC. Calculate the solubility-product constant for Mg₃(PO₄)₂.

K_sp =




(c) The K_sp of Ga(OH)₃ at 25 ^oC is 7.28e-36. What is the molar solubility of Ga(OH)₃?

solubility = _______mol/L

Answer 1

6 (= 2x6128 x 10 M 40)a) Cocz[p04265 = 3 Certament 2 Politice) [cente} = 3x167<10%, spous) = 2x1167 xrom kxp = [cess } {poi ??? = (3x167400 *j* (28167x108) = 1440x1037 b) molarity of mga(poh), = (mans/mstar mats) x Loo com -102160015JxC4000) 56.28 x105m mga(pon), 6) = 3mga ces + 2 portet) {mga2] = 3x 6.28x106m , [PO43) = 2x6128x106m ksp = [mgs2.7°[poj3 1 = (3x6:28x160 }} (2x6:28x168) 2 51.05X1024 c) Gal@h26) = Gas Botine kop of Ga@H) = 7.28x1536 Let assume molarity of Ga (OH)3 = Smolle [Gaf3} = 5 mall, [olt.} = 35 mollL Ksp = [gap3][om33 = (S) (35)3 Ksp = 275+ sa W Kasp => W? →7.20x10"Ormelle mobersolubility of Gal@H), = 7.20x10"Omolle 7.28 x 1536 זב


Gal@H)3.6) Games + 3 otican) ksp= 7.28x1536 ksp= (42*3][04] Let assume [Ga}} = SmallL Ksp = (s ) (35) Cowi] = 35 molle ksp = + 3 12 SE3 7.28 x16 36 -= 1122*10 molil 12 molar solubility of Galoh), = 1122 x 10"mol/L