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Chemistry
9th -
University
Solutions, solubility and precipitation reactions
10 questions
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- 1. Multiple Choice
An aqueous solution is:
any liquid with another compound dissolved in it.
an ionic compound with water dissolved in it.
water with another compound dissolved in it.
none of the above
- 2. Multiple Choice
Which of the following compounds is SOLUBLE?
copper carbonate
calcium carbonate
potassium carbonate
strontium carbonate
- 3. Multiple Choice
When solid NaCl is stirred into water, which of the following is NOT true?
Individual sodium and chloride ions are present.
The solution will conduct electricity.
The solution will taste salty.
The NaCl will fail to dissociate.
- 4. Multiple Choice
In writing the chemical equation for a precipitation reaction, what abbreviation of the physical state must appear with one of the products?
(s)
(g)
(l)
(w)
- 5. Multiple Choice
What would be the formula of the precipitate that forms when Pb(NO3)2 (aq) and K2SO4 (aq) are mixed?
K(NO3)2
PbSO4
PbK2
H2O
- 6. Multiple Choice
Considering the following precipitation reaction:
Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq)
Which compound would not form ions in the complete ionic equation?
PbI2
KNO3
Pb(NO3)2
KI
- 7. Multiple Choice
Considering the following precipitation reaction:
Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq)
Which ion would NOT be present in the complete ionic equation?
Pb2+
K+
NO3-
I-
All the above ions are in the complete ionic equation.
- 8. Multiple Choice
Considering the following precipitation reaction:
Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq)
What is the correct complete ionic equation?
Pb2+ + (NO3)2- + 2K+ + 2I- → PbI2(s) + 2K+ + 2NO3-
Pb2+ + 2NO3- +2K+ + I- → PbI2(s) + 2K+ + NO3-
Pb2+ + 2NO3- + 2K+ + 2I- → PbI2(s) + 2K+ + 2NO3-
Pb2+ + 2NO3- + 2K+ + 2I- → Pb2+ + 2I- + 2K+ + 2NO3-
- 9. Multiple Choice
Which of the following statements about writing molecular, complete and net ionic equations is FALSE?
A molecular equation is a chemical equation showing the complete, neutral formulas for every compound in a reaction
A complete ionic equation is a chemical equation showing all of the species as they are actually present in solution.
A net ionic equation is an equation showing only the species that actually participate in the reaction.
A spectator ion remains unchanged in the reaction and appears on both sides of the equation.
All of the statements are true
- 10. Multiple Choice
Which of the following compounds is INSOLUBLE?
magnesium phosphate
magnesium sulfate
magnesium iodide
magnesium nitrate
none of the above
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