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Solubility and Equilibrium
Related Topics
Wize University Chemistry Textbook > Chemical Reactions
Solubility Rules and Precipitation
4 Activities
Does a precipitate of PbBr
2
form if 50.0 mL of 0.0100 M Pb(NO
3
)
2
is mixed with 50.0 mL of 0.100 M NaBr? (K
sp
PbBr
2
= 2.1 x 10
-6
)
No, because this is a supersaturated solution.
No, because equilibrium will shift towards products,.
Yes, because this is a supersaturated solution.
Yes, because equilibrium will shift towards products.
I don't know
Check Submission
More Solubility Rules and Precipitation Questions:
Practice: Ranking Solubilities
You have a series of beakers, each containing 100 mL of a different solution. If you added nickel (II) hydroxide (Ni(OH)
2
) to each of the beakers, rank them in order of the relative solubility of the Ni(OH)
2
in each:
𝑁
𝑖
(
𝑂
𝐻
)
2
(
𝑠
)
⇌
𝑁
𝑖
2
+
(
𝑎
𝑞
)
+
2
𝑂
𝐻
−
(
𝑎
𝑞
)
𝐾
𝑠
𝑝
=
6.0
×
10
−
16
𝑁𝑖(𝑂𝐻)_2 (𝑠) ⇌𝑁𝑖^{2+} (𝑎𝑞)+2𝑂𝐻^− (𝑎𝑞) \qquad \qquad 𝐾_{𝑠𝑝}=6.0×10^{−16}
N
i
(
O
H
)
2
(
s
)
⇌
N
i
2
+
(
a
q
)
+
2
O
H
−
(
a
q
)
K
s
p
=
6.0
×
1
0
−
16
Additional Data:
A student adds some CuBr (s) (K
sp
= 6.3x10
−9
) to each of the flasks shown here.
Assume that any salts in each flask were fully dissociated before CuBr(s) was added.
Additional data:
Solubility
Which of the following compounds is soluble in water at 25 °C?
Solubility: Dissociation of ions
What ions does Na
2
CO
3
dissociate into in water?
Solubility
Which of the following compounds is soluble in water at 25 °C?
Solubility
Which of the following correctly describes what happens when aqueous solutions of ammonium carbonate, (NH
4
)
2
CO
3
, and potassium bromide, KBr, are mixed?
Does a precipitate form if Pb(NO
3
)
2
is mixed with NaBr?
Solubility
Which of the following correctly describes what happens when aqueous solutions of ammonium carbonate, (NH
4
)
2
CO
3
, and potassium bromide, KBr, are mixed?
Solubility
If we mixed KCl(aq) and Pb(ClO
3
)
2
(aq) would a precipitate form? If yes, name the precipitate.
Enter the answer as either no or yes, chemical formula of precipitate
Solubility
If we mixed 2AgNO
3
(aq) and MgBr
2
would a precipitate form? If yes, what would the precipitate be?
Enter answer as either no or yes, chemical formula of precipitate.
Does a precipitate form if Pb(NO
3
)
2
is mixed with NaBr?
Enter no or yes, name of formula of precipitate
For PbCl
2
(K
sp
= 2.4 x 10
–4
), will a precipitate of PbCl
2
form when 0.10 L of 3.0 x 10
-2
M Pb(NO
3
)
2
is added to 400 mL of 9.0 x 10
-2
M NaCl?
If 4.5g of NaCl are added to a 2.0 L saturated solution of AgCl, what mass of AgCl
(s)
will precipitate? K
sp
for AgCl is 1.7 x 10
-17
Solubility: Rules and mechanisms
You have a series of beakers, each containing 100 mL of a different solution. If you added nickel (II) hydroxide (Ni(OH)
2
) to each of the beakers, rank them in order of the relative solubility of the Ni(OH)
2
in each:
𝑁
𝑖
(
𝑂
𝐻
)
2
(
𝑠
)
⇌
𝑁
𝑖
2
+
(
𝑎
𝑞
)
+
2
𝑂
𝐻
−
(
𝑎
𝑞
)
𝐾
𝑠
𝑝
=
6.0
×
10
−
16
𝑁𝑖(𝑂𝐻)_2 (𝑠) ⇌𝑁𝑖^{2+} (𝑎𝑞)+2𝑂𝐻^− (𝑎𝑞) \qquad \qquad 𝐾_{𝑠𝑝}=6.0×10^{−16}
N
i
(
O
H
)
2
(
s
)
⇌
N
i
2
+
(
a
q
)
+
2
O
H
−
(
a
q
)
K
s
p
=
6.0
×
1
0
−
16
Additional Data:
Solubility: Will a Precipitate Form?
The K
sp
for strontium fluoride SrF
2
is 4.3x10
−9
. If 5.0 x10
−6
mol of NaF (s) are added to 10.0 mL of 1.5x10
−3
M Sr(NO
3
)
2
, will a precipitate form? Assume that any sodium salts or nitrate salts fully dissociate in water.
The K
sp
for CuBr is 6.3x10
−9
. When 1.00 mL of 0.0010 M CuNO
3
is mixed with 1.00 mL of 0.0010 M NaBr, will a precipitate form? Assume that any sodium salts or nitrate salts fully dissociate in water.
Which of the following would decrease the K
sp
for PbI
2
?
For PbCl
2
(K
sp
= 2.4 x 10
–4
), will a precipitate of PbCl
2
form when 0.10 L of 3.0 x 10
-2
M Pb(NO
3
)
2
is added to 400 mL of 9.0 x 10
-2
M NaCl?
A student adds some CuBr (s) (K
sp
= 6.3x10
−9
) to each of the flasks shown here.
Assume that any salts in each flask were fully dissociated before CuBr(s) was added.
Additional data:
Solubility: Practice
A student is preparing to test the molar solubility of PbHPO
4
(s) (K
sp
=3.5×10
−12
) in different aqueous solutions. When this salt dissociates, it produces Pb
2+
(aq) and the amphiprotic ion HPO
4
2−
(aq). They prepare separate beakers with 100 mL of each of the following solutions to test:
water
0.1 M Pb(NO
3
)
2
(aq) (which fully dissociates in water)
Molecular bonding: Physical Properties
Consider two liquids: pentane, C
5
H
12
, and a light mineral oil, C
12
H
26
.
a.
In the table below identify which liquid is being described.
b.
A student observed that a drop of water spreads on a glass surface while on a paraffin coated glass surface it beads. The student’s explanation for this is: “The interaction between water and paraffin is strong because it forms a bead.” Is the student correct or incorrect? Explain
Solubility
A student is preparing to test the molar solubility of PbHPO
4
(s) (K
sp
=3.5×10
−12
) in different aqueous solutions. When this salt dissociates, it produces Pb
2+
(aq) and the amphiprotic ion HPO
4
2−
(aq).They prepare separate beakers with 100 mL of each of the following solutions to test:
water
0.1 M Pb(NO
3
)
2
(aq) (which fully dissociates in water)