Name: ______________________________ period: __________
Solubility Curve
solution of hydrochloric acid; the gas would be released and
could be very harmful)
4. Look at the curves and see; how many grams of NH4Cl could
dissolve in 100 g of water at 50oC? _________
a. How much (in grams if you used 300 ml (300grams) of
water? __________
b. How much if you still used 100 grams of water but
heated the water to 80oC? _______________
5. How many grams of Sodium Nitrate(NaNO3) could dissolve in
100 ml of water at 70oC? _______; at 10oC? _______
6. A solution of NaNO3 in 100 g water is saturated at 40oC; it is
then cooled to 10oC; how much precipitate forms?______
7. At what temperature do KClO3 and NaCl have the same
solubility in water?________
8. If a 200 g of water is saturated with KCl at 10oC, how much
MORE can be added (and still dissolve) if the solution is
heated to 70oC? ________
9. How many grams of NaNO3 are required to saturate 400 grams
of water at 10oC? ________
10. What is the smallest mass of water that will completely
dissolve 23 grams of NH4Cl at 40oC? ______
1. Look at the table above: for most materials how does
temperature affect solubility? ___________________
2. There are 4 compounds listed that don’t follow the general
trend: list them: _____________________________
3. Three compounds you identified above are all gases; the
Hydrogen Chloride is soluble enough in water that I have told
you to call it hydrochloric acid and your experience is with it as
a solution (but that’s why I don’t want you to ever Boil a
What mass of water for 100 grams at 40oC? _____
Name: ____ANSWERS___________________ period: __________
Solubility Curve
solution of hydrochloric acid; the gas would be released and
could be very harmful)
14. Look at the curves and see; how many grams of NH4Cl could
dissolve in 100 g of water at 50oC? __50g NH4Cl___
a. How much (in grams if you used 300 ml (300grams) of
water? ___150 g__(3 times as much as for 100 g H2O)
b. How much if you still used 100 grams of water but
heated the water to 80oC? ___65 g_NH4Cl___
15. How many grams of Sodium Nitrate(NaNO3) could dissolve in
100 ml of water at 70oC? __135 g_; at 10oC? __79 g_
16. A solution of NaNO3 in 100 g water is saturated at 40oC; it is
then cooled to 10oC; how much precipitate forms? __~23 g_
17. At what temperature do KClO3 and NaCl have the same
solubility in water?__74oC____
18. If a 200 g of water is saturated with KCl at 10oC, how much
MORE can be added (and still dissolve) if the solution is
heated to 70oC? __38 g (~19 g x 2)____
19. How many grams of NaNO3 are required to saturate 400 grams
of water at 10oC? __320 g ( 80 g x 4)______
20. What is the smallest mass of water that will completely
dissolve 23 grams of NH4Cl at 40oC? __50 ml____
11. Look at the table above: for most materials how does
temperature affect solubility? __as temp increases so does
solubility___
12. There are 4 compounds listed that don’t follow the general
trend: list them: __SO2, NH3, HCl and Na2SO4____
13. Three compounds you identified above are all gases; the
Hydrogen Chloride is soluble enough in water that I have told
you to call it hydrochloric acid and your experience is with it as
a solution (but that’s why I don’t want you to ever Boil a
a. What mass of water for 100 grams at 40oC? __217.4 g_
46 g NH4Cl / 100 g H2O = 100 g NH4Cl / ? g H2O
? = 214.7