Question 1

Which of the following compounds is soluble in water?

Accepted Answer

A) Sc2O3 
B) Li3P 
C) CuS 
D) Hg2I2 
E) NiS 
A) Sc2O3 
B) Li3P 
C) CuS 
D) Hg2I2 
E) NiS B

Question 2

The oxidation number of barium in BaO is

Accepted Answer

A) +1. 
B) +4. 
C) -1/2. 
D) +2. 
E) -2. 
A) +1. 
B) +4. 
C) -1/2. 
D) +2. 
E) -2. D

Question 3

Which of the following reactions involves neither oxidation nor reduction?

Accepted Answer

A) N2(g)+ 3H2(g)→ 2NH3(g) 
B) NH4NO2(s)→ N2(g)+ 2H2O(l) 
C) Cu(s)+ 2Ag+(aq)→ Cu2+(aq)+ 2Ag(s) 
D) 2CrO42-(aq)+ 2H+(aq)→ Cr2O72-(aq)+ H2O(l) 
E) C2H4(g)+ H2(g)→ C2H6(g) 
A) N2(g)+ 3H2(g)→ 2NH3(g) 
B) NH4NO2(s)→ N2(g)+ 2H2O(l) 
C) Cu(s)+ 2Ag+(aq)→ Cu2+(aq)+ 2Ag(s) 
D) 2CrO42-(aq)+ 2H+(aq)→ Cr2O72-(aq)+ H2O(l) 
E) C2H4(g)+ H2(g)→ C2H6(g) D

Question 4

Which of the following is best described as an oxidation-reduction reaction?

Accepted Answer

A) SO2(g)+ H2O(l)→ H2SO3(aq) 
B) 2Cl(g)→ Cl2(g) 
C) 3O2(g)→ 2O3(g) 
D) 2NO2(g)→ N2O4(g) 
E) SO2(g)+ O2(g)→ SO3(g) 
A) SO2(g)+ H2O(l)→ H2SO3(aq) 
B) 2Cl(g)→ Cl2(g) 
C) 3O2(g)→ 2O3(g) 
D) 2NO2(g)→ N2O4(g) 
E) SO2(g)+ O2(g)→ SO3(g)

Question 5

What precipitate forms when aqueous solutions of calcium bromide and potassium phosphate are mixed?

Accepted Answer

A) (KBr)2(s) 
B) Ca3(PO4)2(s) 
C) CaPO4-(s) 
D) KBr(s) 
E) CaPO4(s) 
A) (KBr)2(s) 
B) Ca3(PO4)2(s) 
C) CaPO4-(s) 
D) KBr(s) 
E) CaPO4(s)

Question 6

A 20.00-mL sample of a weak base is titrated with 0.0568 M HCl.At the endpoint,it is found that 17.88 mL of titrant was used.What was the concentration of the weak base?

Accepted Answer

A) 0.0635 M 
B) 1.59 × 10-4 M 
C) 1.01 M 
D) 0.0568 M 
E) 0.0507 M 
A) 0.0635 M 
B) 1.59 × 10-4 M 
C) 1.01 M 
D) 0.0568 M 
E) 0.0507 M

Question 7

The following reaction occurs in basic solution:
_ H2O(aq)+ _ MnO4-(aq)+ _ ClO-(aq)→ _ MnO2(s)+ _ ClO4-(aq)+ _ OH-(aq)
When the equation is properly balanced,what is the sum of the lowest whole-number coefficients?

Accepted Answer

A) 20 
B) 9 
C) 10 
D) 6 
E) 12 
A) 20 
B) 9 
C) 10 
D) 6 
E) 12

Question 8

Which substance would produce 2 mol of particles per mole of solute when dissolved in water?

Accepted Answer

A) NH4CH3COO 
B) CH2O 
C) CO2 
D) SO2 
E) Al(NO3)3 
A) NH4CH3COO 
B) CH2O 
C) CO2 
D) SO2 
E) Al(NO3)3

Question 9

Which of the following chemical reactions is an oxidation-reduction reaction?

Accepted Answer

A) Zn(s)+ S(s)→ ZnS(s) 
B) H2SO4(aq)+ 2NaOH(aq)→ Na2SO4(aq)+ 2H2O(l) 
C) NaOH(aq)+ HCl(aq)→ NaCl(aq)+ H2O(l) 
D) AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq) 
E) CO2(aq)+ H2O(aq)→ H2CO3(aq) 
A) Zn(s)+ S(s)→ ZnS(s) 
B) H2SO4(aq)+ 2NaOH(aq)→ Na2SO4(aq)+ 2H2O(l) 
C) NaOH(aq)+ HCl(aq)→ NaCl(aq)+ H2O(l) 
D) AgNO3(aq)+ NaCl(aq)→ AgCl(s)+ NaNO3(aq) 
E) CO2(aq)+ H2O(aq)→ H2CO3(aq)

Question 10

What is the final concentration of HCl in a solution prepared by addition of 922.0 mL of 4.73 M HCl to 549.0 mL of 2.03 M HCl? Assume volumes are additive.

Accepted Answer

A) 3.38 M 
B) 0.00459 M 
C) 6.76 M 
D) 3.72 M 
E) 3.03 M 
A) 3.38 M 
B) 0.00459 M 
C) 6.76 M 
D) 3.72 M 
E) 3.03 M

Question 11

Which of the following is a strong acid in aqueous solution?

Accepted Answer

A) HOCH2CH2OH 
B) Mg(OH)2 
C) H3PO4 
D) NH3 
E) HBr 
A) HOCH2CH2OH 
B) Mg(OH)2 
C) H3PO4 
D) NH3 
E) HBr

Question 12

Which of the following chemical reactions is an oxidation-reduction reaction?

Accepted Answer

A) Mg(s)+ CO2(g)→ MgO(s)+ CO(g) 
B) H2SO4(aq)+ Ba(OH)2(aq)→ BaSO4(s)+ 2H2O(l) 
C) Pb(NO3)2(aq)+ 2HCl(aq)→ PbCl2(s)+ 2HNO3(aq) 
D) CO2(aq)+ H2O(l)→ H2CO3(aq) 
E) NH3(g)+ HCl(g)→ NH4Cl(s) 
A) Mg(s)+ CO2(g)→ MgO(s)+ CO(g) 
B) H2SO4(aq)+ Ba(OH)2(aq)→ BaSO4(s)+ 2H2O(l) 
C) Pb(NO3)2(aq)+ 2HCl(aq)→ PbCl2(s)+ 2HNO3(aq) 
D) CO2(aq)+ H2O(l)→ H2CO3(aq) 
E) NH3(g)+ HCl(g)→ NH4Cl(s)

Question 13

What is the balanced oxidation half-reaction for the following reaction?
Cu2+(aq)+ Fe(s)→ Cu(s)+ Fe2+(aq)

Accepted Answer

A) Cu(s)+ 2e- → Cu(s) 
B) Cu2+(aq)+ 2e- → Cu(s) 
C) Fe2+(aq)+ 2e- → Fe(s) 
D) Cu(s)→ Cu2+(aq)+ 2e- 
E) Fe(s)→ Fe2+(aq)+ 2e- 
A) Cu(s)+ 2e- → Cu(s) 
B) Cu2+(aq)+ 2e- → Cu(s) 
C) Fe2+(aq)+ 2e- → Fe(s) 
D) Cu(s)→ Cu2+(aq)+ 2e- 
E) Fe(s)→ Fe2+(aq)+ 2e-

Question 14

Which of the following is a correct set of oxidation numbers for the atoms in calcium dihydrogen phosphate,Ca(H2PO4)2?

Accepted Answer

A) Ca = +2,H = +1,P = +5,O = -2 
B) Ca = +2,H = 0,P = +7,O = -8 
C) Ca = +2,H = -1,P = +4,O = -2 
D) Ca2+ = +2,H2PO4- = -1 
E) Ca = +2,H = +1,P = +3,O = -2 
A) Ca = +2,H = +1,P = +5,O = -2 
B) Ca = +2,H = 0,P = +7,O = -8 
C) Ca = +2,H = -1,P = +4,O = -2 
D) Ca2+ = +2,H2PO4- = -1 
E) Ca = +2,H = +1,P = +3,O = -2

Question 15

Which of the following salts may be obtained by the reaction of a weak acid with a strong base?

Accepted Answer

A) LiClO4 
B) NaCl 
C) K2SO3 
D) MgCl2 
E) NH4F 
A) LiClO4 
B) NaCl 
C) K2SO3 
D) MgCl2 
E) NH4F

Question 16

Which of the following correctly describes one or more of the differences between a strong and weak electrolyte?

Accepted Answer

A) A strong electrolyte partially ionizes in solution and a weak electrolyte completely ionizes in solution. 
B) Strong electrolytes are all classified as soluble ionic substances and weak electrolytes are all classified as soluble molecular substances. 
C) Strong electrolytes produce more ions per mole of substance in solution than weak electrolytes. 
D) Weak electrolytes inhibit the flow of electricity. 
E) Strong electrolytes are weak conductors of electricity. 
A) A strong electrolyte partially ionizes in solution and a weak electrolyte completely ionizes in solution. 
B) Strong electrolytes are all classified as soluble ionic substances and weak electrolytes are all classified as soluble molecular substances. 
C) Strong electrolytes produce more ions per mole of substance in solution than weak electrolytes. 
D) Weak electrolytes inhibit the flow of electricity. 
E) Strong electrolytes are weak conductors of electricity.

Question 17

Which of the following is a strong acid in aqueous solution?

Accepted Answer

A) HClO 
B) H3PO4 
C) HBr 
D) HNO2 
E) H3PO3 
A) HClO 
B) H3PO4 
C) HBr 
D) HNO2 
E) H3PO3

Question 18

Which of the following ions is most likely to form an insoluble sulfate?

Accepted Answer

A) Ca2+ 
B) Cl- 
C) K+ 
D) Li+ 
E) S2- 
A) Ca2+ 
B) Cl- 
C) K+ 
D) Li+ 
E) S2-

Question 19

What products result from mixing aqueous solutions of Cr(NO3)2(aq)and NaNO3(aq)?

Accepted Answer

A) Cr(OH)2(s),Na+(aq),and NO3−(aq) 
B) Cr(OH)2(s)and NaNO3(s) 
C) Cr2(OH)2(aq)and NaNO3(aq) 
D) Cr(OH)2(aq)and NaNO3(s) 
E) Cr(OH)2(s),N2(g),and H2O(l) 
A) Cr(OH)2(s),Na+(aq),and NO3−(aq) 
B) Cr(OH)2(s)and NaNO3(s) 
C) Cr2(OH)2(aq)and NaNO3(aq) 
D) Cr(OH)2(aq)and NaNO3(s) 
E) Cr(OH)2(s),N2(g),and H2O(l)

Question 20

What is the net ionic equation for the reaction of NH3 with HNO3?

Accepted Answer

A) NH3(aq)+ H+(aq)→ NH4+(aq) 
B) NH3(aq)+ HNO3(aq)→ NH4NO3(aq) 
C) NH3(aq)+ NO3-(aq)→ NH2-(aq)+ HNO3(aq) 
D) H-(aq)+ H+(aq)→ H2(g) 
E) H+(aq)+ OH-(aq)→ H2O(l) 
A) NH3(aq)+ H+(aq)→ NH4+(aq) 
B) NH3(aq)+ HNO3(aq)→ NH4NO3(aq) 
C) NH3(aq)+ NO3-(aq)→ NH2-(aq)+ HNO3(aq) 
D) H-(aq)+ H+(aq)→ H2(g) 
E) H+(aq)+ OH-(aq)→ H2O(l)

Exam 4: Chemical Reactions

Which of the following compounds is soluble in water?

The oxidation number of barium in BaO is

Which of the following reactions involves neither oxidation nor reduction?

Which of the following is best described as an oxidation-reduction reaction?

What precipitate forms when aqueous solutions of calcium bromide and potassium phosphate are mixed?

A 20.00-mL sample of a weak base is titrated with 0.0568 M HCl.At the endpoint,it is found that 17.88 mL of titrant was used.What was the concentration of the weak base?

The following reaction occurs in basic solution: _ H2O(aq)+ _ MnO4-(aq)+ _ ClO-(aq)→ _ MnO2(s)+ _ ClO4-(aq)+ _ OH-(aq) When the equation is properly balanced,what is the sum of the lowest whole-number coefficients?

Which substance would produce 2 mol of particles per mole of solute when dissolved in water?

Which of the following chemical reactions is an oxidation-reduction reaction?

What is the final concentration of HCl in a solution prepared by addition of 922.0 mL of 4.73 M HCl to 549.0 mL of 2.03 M HCl? Assume volumes are additive.

Which of the following is a strong acid in aqueous solution?

Which of the following chemical reactions is an oxidation-reduction reaction?

What is the balanced oxidation half-reaction for the following reaction? Cu2+(aq)+ Fe(s)→ Cu(s)+ Fe2+(aq)

Which of the following is a correct set of oxidation numbers for the atoms in calcium dihydrogen phosphate,Ca(H2PO4)2?

Which of the following salts may be obtained by the reaction of a weak acid with a strong base?

Which of the following correctly describes one or more of the differences between a strong and weak electrolyte?

Which of the following is a strong acid in aqueous solution?

Which of the following ions is most likely to form an insoluble sulfate?

What products result from mixing aqueous solutions of Cr(NO3)2(aq)and NaNO3(aq)?

What is the net ionic equation for the reaction of NH3 with HNO3?

Chemistry and Measurement

Atoms, molecules, and Ions

Calculations With Chemical Formulas and Equations

The Gaseous State

Thermochemistry

Quantum Theory of the Atom

Electron Configurations and Periodicity

Ionic and Covalent Bonding

Molecular Geometry and Chemical Bonding Theory

States of Matter; Liquids and Solids

Solutions

Rates of Reaction

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria

Solubility and Complex-Ion Equilibria

Thermodynamics and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry of the Main-Group Metals

The Transition Elements and Coordination Compounds

Organic Chemistry

Polymer Materials: Synthetic and Biological

Filters

The following reaction occurs in basic solution: _ H₂O(aq)+ _ MnO₄^-(aq)+ _ ClO^-(aq)→ _ MnO₂(s)+ _ ClO₄^-(aq)+ _ OH^-(aq) When the equation is properly balanced,what is the sum of the lowest whole-number coefficients?

What is the balanced oxidation half-reaction for the following reaction? Cu²⁺(aq)+ Fe(s)→ Cu(s)+ Fe²⁺(aq)

Which of the following is a correct set of oxidation numbers for the atoms in calcium dihydrogen phosphate,Ca(H₂PO₄)₂?

What products result from mixing aqueous solutions of Cr(NO₃)₂(aq)and NaNO₃(aq)?

What is the net ionic equation for the reaction of NH₃ with HNO₃?