Part I:
An aqueous solution is
saturated in both potassium chlorate and carbon dioxide gas at room
temperature. What happens when the solution is cooled to
0°C?
-noting happens; all of the potassium chlorate
and the carbon dioxide remain at the same concentration
levels
-potassium chlorate precipitates out of
solution
-potassium chlorate precipitates out of solution
and carbon dioxide bubbles out of solution
-carbon dioxide bubbles out of
solution
-the solution becomes unsaturated in terms of
potassium chlorate
Part
II
Choose the statement below that is
TRUE.
-A solution will form between
two substances if the solute-solvent interactions are small enough
to be overcome by the solute-solute and solvent-solvent
interactions.
-None of the above are true.
-A solution will form between two substances if the solute-solvent
interactions are of comparable strength to the solute-solute and
solvent-solvent interactions.
-A solution will form between two substances if the solute-solute
interactions are strong enough to overcome the solvent-solvent
interactions.
-A solution will form between two substances only if the
solvent-solvent interactions are weak enough to overcome the
solute-solvent interactions.
part 1:
KClO3 dissolves the least at 0 degree centigrade. as we know the least soluble one precipitate out first. and at 0 degree the CO2 gas gets absorbed the most. so thesolution becomes unsaturated in terms of KClO3 only.
part2:
none of the above are true.
lets take an example. NaCl in water. NaCl dissociates to form Na+ and Cl-. The water molecule must have sufficient attraction to overcome the attraction between two ions. Also the ions must have sufficient attraction to overcome attraction between solvent-solvent.
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