Chem quiz – Flashcards

Unlock all answers in this set

Unlock answers
question
Under which conditions are gases most soluble in water?
answer
high pressure and low temperature
question
Based on Reference Table G, which salt solution could contain 42 grams of solute per 100 grams of water at 40°C?
answer
an unsaturated solution of NH4Cl
question
How many grams of NaNO3 would have to be added to 100. grams of water at 45°C to make a saturated solution of this salt?
answer
110
question
According to Reference Table F, which of the following compounds will form a saturated solution that is most dilute?
answer
Calcium Carbonate
question
A solution containing 60 grams of NaNO3 completely dissolved in 50. grams of water at 50°C is classified as being
answer
Supersaturated
question
According to Reference Table G, which of the following saturated solutions is the most concentrated?
answer
KNO3 at 70°C
question
According to Reference Table G, a temperature change from 60°C to 90°C has the least effect on the solubility of
answer
SO2
question
According to Reference Table G, which compound's solubility decreases most rapidly when the temperature increases from 50°C to 70° C?
answer
NH3
question
In an aqueous solution of an ionic salt, the oxygen atom of the water molecule is attracted to the
answer
positive ion of the salt, due to oxygen's partial negative charge
question
In aqueous solution, a chloride ion is attracted to which end of the water molecule?
answer
the hydrogen end, which is the positive pole
question
According to Reference Table G, which of these substances is most soluble at 60°C?
answer
NH4Cl
question
What occurs when NaCl(s ) is added to water?
answer
The boiling point of the solution increases, and the freezing point of the solution decreases
question
At STP, which of these substances is most soluble in H2O?
answer
HCl
question
The solubility of KClO3(s) in water increases as the
answer
temperature of the solution increases
question
A student adds solid KCl to water in a flask. The flask is sealed with a stopper and thoroughly shaken until no more solid KCl dissolves. Some solid KCl is still visible in the flask. The solution in the flask is
answer
saturated and is at equilibrium with the solid KCl
question
An unsaturated aqueous solution of NH3 is at 90°C in 100 grams of water. According to Reference Table G, how many grams of NH3 could this unsaturated solution contain?
answer
5g
question
Which compound is least soluble in water at 60.°C?
answer
KCl03
Get an explanation on any task
Get unstuck with the help of our AI assistant in seconds
New