UNE chem 1011 final Questions With Complete Solutions
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Course
Chem 1011
Institution
University Of New England (UNE
)
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 ______ mi...
une chem 1011 final questions with complete soluti
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University of New England (UNE
)
Chem 1011
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UNE chem 1011 final Questions With
Complete Solutions
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
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
two or more separate chemical reactions that share one or more
reactants or products correct answer: coupled equilibria
T/F: The dramatic increase in solubility with increasing acidity
for calcium carbonate is typical of salts containing basic anions
(ex: carbonate, fluoride, hydroxide, sulfide) correct answer:
True
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