UNE chem 1011 final Exam Questions With
Correct Answers
When are solubility equilibria established - CORRECT ANSWER✔✔-
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when the dissolution and precipitation of a solute species occur at equal
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rates
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A solute with finite solubility can yield a saturated solution when it is
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added to a solvent in an amount exceeding its solubility, resulting in a
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______ mixture of the saturated solution and the excess, undissolved
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solute. - CORRECT ANSWER✔✔-heterogeneous
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Equilibrium constant for solubility equilibria - CORRECT ANSWER✔✔-
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solubility product constant Ksp | | |
If the concentrations of calcium and carbonate ions in the mixture do
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not yield a reaction quotient, Qsp, that exceeds the solubility product,
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Ksp, then ________ will occur. - CORRECT ANSWER✔✔-no precipitation
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If the ion concentrations yield a reaction quotient greater than the
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solubility product, then ______ will occur, lowering those
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concentrations until equilibrium is established (Qsp = Ksp). - CORRECT
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ANSWER✔✔-precipitation
, What occurs when Qsp< Ksp? - CORRECT ANSWER✔✔-the reaction
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proceeds in the forward direction (solution is not saturated; no
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precipitation observed) |
What occurs when Qsp>Ksp? - CORRECT ANSWER✔✔-the reaction
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proceeds in the reverse direction (solution is supersaturated;
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precipitation will occur) | |
expiremental strategy used to remove individual ions from solution
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when the solution contains two or more ions that may form insoluble
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compounts with the same counter ion - CORRECT ANSWER✔✔-
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selective precipitation |
during selective precipitation, the ion with the _____ soluble compound
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will precipitate first (at the lowest concentration of counter ion) -
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CORRECT ANSWER✔✔-least |
Compared with pure water, the solubility of an ionic compound is ___ in
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aqueous solutions containing a common ion (one also produced by
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dissolution of the ionic compound) - CORRECT ANSWER✔✔-less
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the effect responisble for the solubility of an ionic compound being less
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in aqueous solutions containing a common ion; the law of mass action -
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CORRECT ANSWER✔✔-common ion effect
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Correct Answers
When are solubility equilibria established - CORRECT ANSWER✔✔-
| | | | | | |
when the dissolution and precipitation of a solute species occur at equal
| | | | | | | | | | |
rates
|
A solute with finite solubility can yield a saturated solution when it is
| | | | | | | | | | | | |
added to a solvent in an amount exceeding its solubility, resulting in a
| | | | | | | | | | | | |
______ mixture of the saturated solution and the excess, undissolved
| | | | | | | | | |
solute. - CORRECT ANSWER✔✔-heterogeneous
| | |
Equilibrium constant for solubility equilibria - CORRECT ANSWER✔✔-
| | | | | | |
solubility product constant Ksp | | |
If the concentrations of calcium and carbonate ions in the mixture do
| | | | | | | | | | | |
not yield a reaction quotient, Qsp, that exceeds the solubility product,
| | | | | | | | | | |
Ksp, then ________ will occur. - CORRECT ANSWER✔✔-no precipitation
| | | | | | | |
If the ion concentrations yield a reaction quotient greater than the
| | | | | | | | | | |
solubility product, then ______ will occur, lowering those
| | | | | | | |
concentrations until equilibrium is established (Qsp = Ksp). - CORRECT
| | | | | | | | | |
ANSWER✔✔-precipitation
, What occurs when Qsp< Ksp? - CORRECT ANSWER✔✔-the reaction
| | | | | | | | |
proceeds in the forward direction (solution is not saturated; no
| | | | | | | | | |
precipitation observed) |
What occurs when Qsp>Ksp? - CORRECT ANSWER✔✔-the reaction
| | | | | | | |
proceeds in the reverse direction (solution is supersaturated;
| | | | | | | |
precipitation will occur) | |
expiremental strategy used to remove individual ions from solution
| | | | | | | | |
when the solution contains two or more ions that may form insoluble
| | | | | | | | | | | |
compounts with the same counter ion - CORRECT ANSWER✔✔-
| | | | | | | |
selective precipitation |
during selective precipitation, the ion with the _____ soluble compound
| | | | | | | | |
will precipitate first (at the lowest concentration of counter ion) -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-least |
Compared with pure water, the solubility of an ionic compound is ___ in
| | | | | | | | | | | |
aqueous solutions containing a common ion (one also produced by
| | | | | | | | | | |
dissolution of the ionic compound) - CORRECT ANSWER✔✔-less
| | | | | | |
the effect responisble for the solubility of an ionic compound being less
| | | | | | | | | | | |
in aqueous solutions containing a common ion; the law of mass action -
| | | | | | | | | | | | |
CORRECT ANSWER✔✔-common ion effect
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