How many oxygen atoms are present in MgSO4 • 7H2O?

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Chemistry, The Central Science, 11th edition
Theodore L. Brown; H. Eugene LeMay, Jr.;
Bruce E. Bursten and Catherine J. Murphy
Chapter 17
Additional Aspects of Aqueous
Equilibria
Donna Narsavage Heald
Siena College
Loudonville, NY
 2009, Prentice Hall
Which of the following will produce a
buffer solution?
1.
2.
3.
4.
5.
HCl/NaCl
HC2H3O2/NH3
NaH2PO4/Na2HPO4
HNO3/Ca(OH)2
KNO3/ NaOH
Which of the following will produce a
buffer solution?
1.
2.
3.
4.
5.
HCl/NaCl
HC2H3O2/NH3
NaH2PO4/Na2HPO4
HNO3/Ca(OH)2
KNO3/ NaOH
In an NH4+/NH3 buffer, what concentration changes will
occur if a small amount of OH– is added?
[NH4+]
[NH3]
pH
1.
Increase
Increase
Increase
2.
Decrease
Increase
Increase
3.
Increase
Decrease
Increase
4.
Increase
Decrease
Decrease
5.
Decrease
Increase
Decrease
In an NH4+/NH3 buffer, what concentration changes will
occur if a small amount of OH– is added?
[NH4+]
[NH3]
pH
1.
Increase
Increase
Increase
2.
Decrease
Increase
Increase
3.
Increase
Decrease
Increase
4.
Increase
Decrease
Decrease
5.
Decrease
Increase
Decrease
Which indicator would best determine the
endpoint of the titration of NaC2H3O2 with HNO3?
1. Methyl violet
2. Methyl orange
3. Bromthymol
blue
4. Phenolphthalein
5. Alizarin yellow R
Which indicator would best determine the
endpoint of the titration of NaC2H3O2 with HNO3?
1. Methyl violet
2. Methyl orange
3. Bromthymol
blue
4. Phenolphthalein
5. Alizarin yellow R
This titration curve was obtained in the titration of an
unknown acid with 0.10 M NaOH. What is the pKa of
the acid?
10
~2
~4
~5
~7
~8
8
pH
1.
2.
3.
4.
5.
6
4
2
0
0
5
10
15
mL NaOH
20
This titration curve was obtained in the titration of an
unknown acid with 0.10 M NaOH. What is the pKa of
the acid?
10
~2
~4
~5
~7
~8
8
pH
1.
2.
3.
4.
5.
6
4
2
0
0
5
10
15
mL NaOH
20
Addition of _____ will increase the
solubility of MgCO3.
MgCO3(s)
1.
2.
3.
4.
5.
MgCl2
Na2CO3
NaOH
HCl
KHCO3
Mg2+(aq) +
CO32–(aq)
Addition of _____ will increase the
solubility of MgCO3.
MgCO3(s)
1.
2.
3.
4.
5.
MgCl2
Na2CO3
NaOH
HCl
KHCO3
Mg2+(aq) +
CO32–(aq)
Predict the order of precipitation of Ba2+,
Pb2+, Ca2+ with the addition of NaF.
1. Ca2+ then Ba2+ then Pb2+
2. Pb2+ then Ba2+ then Ca2+
3. Pb2+ then Ca2+ then Ba2+
4. Ca2+ then Pb2+ then Ba2+
5. Ba2+ then Pb2+ then Ca2+
Ksp
BaF2
1.7 x 10–6
PbF2
3.6 x 10–8
CaF2
3.9 x 10–11
Predict the order of precipitation of Ba2+,
Pb2+, Ca2+ with the addition of NaF.
1. Ca2+ then Ba2+ then Pb2+
2. Pb2+ then Ba2+ then Ca2+
3. Pb2+ then Ca2+ then Ba2+
4. Ca2+ then Pb2+ then Ba2+
5. Ba2+ then Pb2+ then Ca2+
Ksp
BaF2
1.7 x 10–6
PbF2
3.6 x 10–8
CaF2
3.9 x 10–11
Predict the order of precipitation of Cl–,
CO32–, Br– upon the addition of AgNO3.
1. Br– then CO32– then Cl–
Ksp
2. Br– then Cl– then CO32–
AgCl
1.8 x 10–10
3. Cl– then CO32– then Br–
Ag2CO3
8.1 x 10–12
4. Cl– then Br– then CO32–
AgBr
5.0 x 10–13
5. CO32– then Cl– then Br–
Predict the order of precipitation of Cl–,
CO32–, Br– upon the addition of AgNO3.
1. Br– then CO32– then Cl–
Ksp
2. Br– then Cl– then CO32–
AgCl
1.8 x 10–10
3. Cl– then CO32– then Br–
Ag2CO3
8.1 x 10–12
4. Cl– then Br– then CO32–
AgBr
5.0 x 10–13
5. CO32– then Cl– then Br–

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