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# Solubility Curves (Grade 9)

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## Solubility Curves

Use the solubility curve graph to answer the questions.
1.
Which of the following has a solubility that decreases as temperature increases?
1. $KCl$
2. $NH_3$
3. $KNO_3$
4. $Ce_2(SO_4)_3$
2.
The solubility of potassium chloride                      as its temperature                     .
1. increases; increases
2. decreases; decreases
3. increases; decreases
4. decreases; increases
3.
Which is least soluble in water at $30degC$?
1. $KCl$
2. $KNO_3$
3. $KClO_3$
4. $Ce_2(SO_4)_3$
4.
Which salt is most soluble in water at $20degC$?
1. $KI$
2. $KCl$
3. $KClO_3$
4. $Ce_2(SO_4)_3$
5.
How many grams of $KClO_3$ can be dissolved at $80degC$?
1. 22 g
2. 40 g
3. 50 g
4. 64 g
6.
At what temperature will 80 grams of $KNO_3$ dissolve?
1. $30degC$
2. $44degC$
3. $50degC$
4. $144degC$
7.
At which of the temperatures is 40 grams of $KCl$ unsaturated?
1. $30degC$
2. $40degC$
3. $50degC$
4. $60degC$
8.
40 grams of which of the following is supersaturated at $10degC$?
1. $KI$
2. $NH_3$
3. $NH_4Cl$
4. $NaNO_3$
9.
$NaNO_3$ and $KNO_3$ have the same solubility at what temperature?
1. $28degC$
2. $73degC$
3. $136degC$
4. $150degC$
10.
At what temperature is the solubility of ammonia the same as the solubility of sodium nitrate?
1. $6degC$
2. $32degC$
3. $56degC$
4. $77degC$
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