Question

QUESTION 1

The molar solubility of lead phosphate in a 0.136 M ammonium phosphate solution is ?

QUESTION 2Consider these compounds:

A. Ag3PO4

B. Ni(CN)2

C. Al(OH)3

D. CaF2

Complete the following statements by entering the letter(s) corresponding to the correct compound(s). (If more than one compound fits the description, include all the relevant compounds by writing your answer as a string of characters without punctuation, e.g, ABC.)

Without doing any calculations it is possible to determine that silver chromate is more soluble than ? and silver chromate is less soluble than . ???

It is not possible to determine whether silver chromate is more or less soluble than ???? by simply comparing K_sp values.

PLEASEE HELPPP IM RATING

Answer 1

Question 1)

Pb3(PO4)2 -----------------> 3 Pb2+ + 2PO43-

                                             3S

Ksp = (3S)^3 [PO43-]^2

3 x 10^-44 = 27S^3 (0.136)^2

S = 3.92 x 10^-15 M

molar solubility   = 3.92 x 10^-15 M

2)

A. Ag3PO4      = 1.3 x 10^-20

B. Ni(CN)2 =    3x10^-23

C. Al(OH)3    = 1.9 x 10^-33

D. CaF2   = 3.9 x 10^-11

Ag2CrO4 , Ksp = 9 x 10^-12

based Ksp values we can say

silver chromate is more soluble than ABC and silver chromate is less soluble than D