Water 3
Table G Practice
First, cross out the Y axis label on
table G
Replace it with:
Number of grams of Solute
per 100 mL of water
Are these solutions SATURATED or UNSATURATED?
If they are unsaturated, how many more grams of solute would fit into the solution?
Temp
Mass of
solute
30°
60g
60°
60°
90°
20°
5°
Solute
Saturated or
unsaturated
How much
more solute
fits?
HCl
?
?
three
Temp
Mass of
solute
30°
60g
60°
60°
90°
20°
5°
Solute
Saturated or
unsaturated
How much
more solute
fits?
HCl
Unsaturated
About 7 g
four
Solute
Saturated or
unsaturated
How much
more solute
fits?
60g
HCl
Unsaturated
About 7 g
100g
KNO3
?
?
Temp
Mass of
solute
30°
60°
60°
90°
20°
5°
five
Solute
Saturated or
unsaturated
How much
more solute
fits?
60g
HCl
Unsaturated
About 7 g
100g
KNO3
unsaturated
About 5 g
Temp
Mass of
solute
30°
60°
60°
90°
20°
5°
six
Solute
Saturated or
unsaturated
How much
more solute
fits?
60g
HCl
Unsaturated
About 7 g
60°
100g
KNO3
unsaturated
About 5 g
60°
125g
NaNO3
?
?
90°
10 g
NH3
?
?
Temp
Mass of
solute
30°
20°
5°
seven
Solute
Saturated or
unsaturated
How much
more solute
fits?
60g
HCl
Unsaturated
About 7 g
60°
100g
KNO3
unsaturated
About 5 g
60°
125g
NaNO3
Saturated
Zero
90°
10 g
NH3
Saturated
zero
Temp
Mass of
solute
30°
20°
5°
eight
Solute
Saturated or
unsaturated
How much
more solute
fits?
60g
HCl
Unsaturated
About 7 g
60°
100g
KNO3
unsaturated
About 5 g
60°
125g
NaNO3
Saturated
Zero
90°
10 g
NH3
Saturated
zero
20°
30g
KCl
?
?
5°
36g
NaCl
?
?
Temp
Mass of
solute
30°
nine
Solute
Saturated or
unsaturated
How much
more solute
fits?
60g
HCl
Unsaturated
About 7 g
60°
100g
KNO3
unsaturated
About 5 g
60°
125g
NaNO3
Saturated
Zero
90°
10 g
NH3
Saturated
zero
20°
30g
KCl
Unsaturated
About 3 g
5°
36g
NaCl
Temp
Mass of
solute
30°
ten
Solute
Saturated or
unsaturated
How much
more solute
fits?
60g
HCl
Unsaturated
About 7 g
60°
100g
KNO3
unsaturated
About 5 g
60°
125g
NaNO3
Saturated
Zero
90°
10 g
NH3
Saturated
zero
20°
30g
KCl
Unsaturated
About 3 g
5°
36g
NaCl
Unsaturated
About 2 g
Temp
Mass of
solute
30°
1. How many grams of potassium nitrate saturates 100 mL water at 60°C?
2. Could you dissolve 130 g potassium nitrate into 100 mL of this water?
3. Could you dissolve 40 g NaCl into 100 mL water at 70 °C?
4. What’s the saturation level for sodium chloride in 100 mL of 70 °C aqueous solution?
THINK hard, look hard, write down 4 answers
1. How many grams of potassium nitrate saturates 100 mL water at 60°C?
About 107 grams
2. Could you dissolve 130 g potassium nitrate into 100 mL of this water?
No, it’s saturated by 107 grams
3. Could you dissolve 40 g NaCl into 100 mL water at 70 °C?
No, it’s saturated at 38 grams
4. What’s the saturation level for sodium chloride in 100 mL of 70 °C aqueous solution?
About 38 grams
Assume you have a saturated 100 mL aqueous solution
of KClO3 at 50°C. What happens if you cool it to 45°C?
Start at fifty
Cool to forty
Assume you have a saturated 100 mL aqueous solution
of KClO3 at 50°C. What happens if you cool it to 45°C?
Start at fifty
Cool to forty
22 grams of
KClO3 fits into
solution.
Only 15 grams
KClO3 fits at
this cooler
temperature
7 grams
precipitates out
of solution.
Easy question first, then another, then a harder one.
Assume you have a 100 mL saturated solution of NaNO3 at 20°C, and you
warm it up to 50°C. How much more solute will be able to dissolve?
How many grams of ammonia will dissolve into 100 mL water at 90°C?
How many grams of ammonia will dissolve into just 40 mL water at the
same temperature?
Assume you have a 100 mL saturated solution of NaNO3 at 20°C, and you warm it up to
50°C. How much more solute will be able to dissolve?
At 50 degrees about 115 g
At 20 degrees about 88 g
27 more grams could dissolve into the warmer solution
How many grams of ammonia will dissolve into 100 mL water at 90°C?
How many grams of ammonia will dissolve into just 40 mL water at the same
temperature?
Assume you have a 100 mL saturated solution of NaNO3 at 20°C, and you warm it up to
50°C. How much more solute will be able to dissolve?
At 50 degrees about 115 g
At 20 degrees about 88 g
27 more grams could dissolve into the warmer solution
How many grams of ammonia will dissolve into 100 mL water at 90°C?
10 grams
How many grams of ammonia will dissolve into just 40 mL water at the same
temperature?
90°C
Ammonia
water
10 g
100 mL
=
Xg
40 mL
100 x = 400
X = 4 g ammonia
How many grams NaCl dissolves into 43 mL water at 90°C?
How many grams sodium nitrate saturates 1000 mL water at 10°C?
How many grams NaCl dissolves into 43 mL water at 90°C?
90°C
NaCl
water
40g
100 mL
Xg
43 mL
100 x = 1720
X = 17.2 grams = 17 grams with 2 SF
How many grams sodium nitrate saturates 1000 mL water at 10°C?
10°C
NaNO3
water
80g
100 mL
Xg
1000 mL
100 x = 80000
X = 800 grams
How many grams KCl saturates 875 mL water at 10°C?
How many grams sodium nitrate dissolve into 1420 mL water at 50°C?
How many grams ammonium chloride dissolve into 25 mL water at 70 °C?
How many grams KCl saturates 875 mL water at 10°C?
10°C
KCl
water
30 g
100 mL
Xg
875 mL
100 X = 26250
X = 262.5 = 263 g
3 SF
How many grams sodium nitrate dissolve into 1420 mL water at 50°C?
50°C
NaNO3
water
115 g
100 mL
Xg
1420 mL
100 X = 163,300
X = 1633 = 1630 g
3 SF
How many grams ammonium chloride dissolve into 25.0 mL water at 70 °C?
15.5 = 16 grams with 2 SF
70°C
NH4Cl
water
62 g
100 mL
Xg
25.0 mL
100 X = 1550
X = 15.5 g ammonium chloride