Homework: Equilibrium Amounts
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1
2Name
Period
Date
Pre-AP Chemistry
Homework: Equilibrium Amounts
1.
Solid calcium sulfate, CaSO
, dissolves in water to form separate ions.
4
a.
Write the chemical equation showing this dissolving process.
b.
Write the solubility equilibrium expression.
c.
Why is calcium sulfate NOT included in the equilibrium expression?
2.
Solid magnesium hydroxide, Mg(OH)
, dissolves in water.
2
a.
Write the chemical equation showing this dissolving process.
b.
Write the solubility equilibrium expression.
c.
_______________ How many hydroxide ions are formed for each magnesium ion?
3.
Solid copper (II) phosphate dissolves in water. You might need your ion chart to determine the formula.
a.
Write the chemical equation showing this dissolving process.
b.
Write the solubility equilibrium expression.
c.
_______________ How many moles of copper ions form for every one mole of phosphate that is formed?
3+
4.
A sample of solid aluminum hydroxide, Al(OH)
is added to water at 25ºC. At equilibrium the concentration of Al
ions
3,
-9
is 2.6 × 10
M.
a.
Write the chemical equation showing this dissolving process.
b.
_______________ How many hydroxide ions form for every aluminum ion?
c.
Complete the I.C.E chart for the dissolving of aluminum hydroxide
+3
–1
Al(OH)
Al
OH
3
Mole Ratio
Initial amount
n/a
0
0
Change
n/a
-9
Equilibrium amount
n/a
2.6 × 10
M
d.
Write the solubility equilibrium expression.
e.
_______________ Calculate the K
for Al(OH)
.
sp
3
f.
Is this process reactant or product favored?
Homework: Equilibrium Amounts
1
4/16/15
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