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WorksheetsAltering Solubility and Qualitative Analysis
Total questions: 13
Worksheet time: 23mins
Consider the following solubility equilibrium:
BaSO3(s) ⟺ Ba+2(aq) + SO3-2(aq)
Which of the following will result in an increase of [Ba+2]?
adding BaS(s)
adding Na2SO3(s)
adding BaSO3(s)
adding water
Which of the following describes the changes in ion concentrations when 1.0 g of solid ZnS is added to a saturated solution of ZnS?
[Zn+2] decreases and [S-2] decreases
Both [Zn+2] and [S-2] remain constant
[Zn+2] increases and [S-2]
increases
[Zn+2] increases and [S-2] decreases
What occurs when 0.50 M of Pb(NO3)2 is added to a saturated solution of PbI2?
Ksp value increases
The solubility of PbI2 increases
The [I-] increases
The mass of the solid increases
What will be the effect of adding some solid Cu(NO3)2 to a saturated solution of AgCl?
More AgCl will be produced
The Cu(NO3)2 will not dissolve
More AgCl will dissolve
The Cu(NO3)2 will not affect the AgCl equilibrium
Consider the following equilibrium:
CaSO4(s) ⟺ Ca+2(aq) + SO4-2(aq)
When Na2CO3 is added to this solution, which of the following will occur in regards to the equilibrium and [SO4-2]?
Equilibrium - shifts left
[SO4-2] - decreases
Equilibrium - shifts right
[SO4-2] - decreases
Equilibrium - shifts right
[SO4-2] - increases
Equilibrium - shifts left
[SO4-2] - increases
Which of the following in true when solid NaOH is added to a saturated solution of CuS and equilibrium is re-established?
[S-2] increases
[S-2] does not change
[Cu+2] increases
[Cu+2] does not change
Which of the following could dissolve a precipitate of CaC2O4 in a saturated solution of CaC2O4?
CaC2O4
H2C2O4
Ca(NO3)2
NaOH
Identify the group of cations that can be precipitated from solution by hydrobromic acid, HBr.
Ag+, Zn+2, Hg2+
Pb+2, Zn+2, Hg2+
Cu+, Pb+2, Ag+
Ag+, Pb+2, Cu2+
What two ions make water "hard"?
Mg2+ and Cu2+
Mg2+ and Ca2+
Pb2+ and Cu2+
Pb2+ and Ca2+
To remove Mg2+ from a solution by precipitation, a student should add...
Li2SO4
(NH4)2S
NaI
KOH
Which of the following ions could be used to only remove Cu+2 by precipitation from a solution containing Mg2+, Cu2+, and Ca2+?
OH-
PO4-3
S-2
Cl-
In a qualitative analysis experiment, a student has a solution which contains 0.10 M Cl- and 0.10 M SO4-2. Which of the following could be added to this solution to precipitate the sulphate ion while leaving the chloride ion in solution.
Ca(NO3)2
NaNO3
AgNO3
KNO3
You have a solution of CaS and you want to precipitate out both ions from solution. You have the following solids to use: ZnSO4, NH4Cl, and NaOH. Indicate the order in which you would add the compounds and the precipitate formed.
First add ZnSO4. The precipitate would be ZnS.
Second add NaOH. The precipitate would be Ca(OH)2.
First add NaOH. The precipitate would be Ca(OH)2.
Second add ZnSO4. The precipitate would be ZnS.
First add NaOH. The precipitate would be Ca(OH)2.
Second add NH4Cl. The precipitate would be (NH4)2S.
First add ZnSO4. The precipitate would be ZnS.
Second add NH4Cl. The precipitate would be CaCl2.
