Chemistry Test Review - Water And Solubility Page 2
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1
2
3Solubility Chart
Use the solubility chart to the left to answer the following
questions.
o
1. How much KNO
should be able to dissolve at 65
C in 100
3
g of water?
About 118 g
2. Which compound’s solubility changes the least as the
temperature is increased?
NaCl changes the least
o
3. Which compound has the lowest solubility at 50
C? At
o
10
C?
At 50°C = Ce
(SO
)
At 10°C = KClO
2
4
3
3
4. At what temperature can only 80 g of NaNO
dissolve in
3
100 g of water?
10°C
5. If you dissolved exactly 100 g of
KCl
in 100 g of water at
o
80
C, would the solution be saturated, unsaturated, or
supersaturated?
Supersaturated
o
5. If you dissolved 125 g of NaNO
at 60
C and then
3
o
cooled the solution down to 40
C, what would the solution
be considered? Saturated, unsaturated, or supersaturated?
Supersaturaed
Solubility Rules
Use your solubility chart for the following questions
1. Label the following as soluble or insoluble
a. CaSO
Soluble
4
b. AgBr
Insoluble
c. NH
OH
Soluble
4
d. BaCO
Insoluble
3
2. A _______Precipitate________ is an insoluble solid that forms in a chemical reaction.
3. Predict if the following reactions would form a precipitate. Write either “precipitate” or “no
precipitate” in the blank. If there is a precipitate, circle it!
AgOH + LiNO
a. LiOH + AgNO
________Precipitate_________
3
3
Na
b. FeS + NaNO
S
+ Fe(NO
)
_______No
Precipitate_______
3
2
3
2
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