- #1
higherme
- 129
- 0
can anyone check if this is right?
question :
Explain if a solution contains both I− and Cl− at about 0.01 M, can we determine the amount of Cl− and I− independently by using gravimetric analysis?
yes
add [AG+] to precipitate out the I- first ( ksp is smaller)
0.01M * (0.01%/100%) = 1.0E-6 M I-
ksp = [Ag+][I-]
8.5E-17 = [Ag+](1.0E-6)
[Ag+] = 8.5E-11 M <------ add to precipitate AgI
increase [Ag+] to precipitate Cl- left
question :
Explain if a solution contains both I− and Cl− at about 0.01 M, can we determine the amount of Cl− and I− independently by using gravimetric analysis?
yes
add [AG+] to precipitate out the I- first ( ksp is smaller)
0.01M * (0.01%/100%) = 1.0E-6 M I-
ksp = [Ag+][I-]
8.5E-17 = [Ag+](1.0E-6)
[Ag+] = 8.5E-11 M <------ add to precipitate AgI
increase [Ag+] to precipitate Cl- left