Question 1

Which of the following is best described as an acid-base reaction?

Accepted Answer

A) HNO3(aq)+ NH3(aq)→ NH4+(aq)+ NO3-(aq) 
B) P4(s)+ 3OH-(aq)+ 3H3O(l)→ PH3(g)+ 3H2PO2-(aq) 
C) Cu(s)+ H2S(g)→ CuS(s)+ H2(g) 
D) 2H2(g)+ O2(g)→ 2H2O(l) 
E) 2KClO3(aq)→ 2KCl(s)+ 3O2(g) 
A) HNO3(aq)+ NH3(aq)→ NH4+(aq)+ NO3-(aq) 
B) P4(s)+ 3OH-(aq)+ 3H3O(l)→ PH3(g)+ 3H2PO2-(aq) 
C) Cu(s)+ H2S(g)→ CuS(s)+ H2(g) 
D) 2H2(g)+ O2(g)→ 2H2O(l) 
E) 2KClO3(aq)→ 2KCl(s)+ 3O2(g)

Question 2

When solutions of barium iodide and lithium sulfate are mixed,the spectator ions in the resulting reaction are

Accepted Answer

A) only SO42-. 
B) both Li+ and I-. 
C) only I-. 
D) only Li+. 
E) only Ba2+. 
A) only SO42-. 
B) both Li+ and I-. 
C) only I-. 
D) only Li+. 
E) only Ba2+.

Question 3

_____ is a type of quantitative analysis in which the amount of a species in a material is determined by converting the species to a product that can be isolated completely and weighed.

Accepted Answer

A) ​Redox titration 
B) ​Gravimetric analysis 
C) ​Catalytic analysis 
D) ​Electro analysis 
E) ​Complexometric titration 
A) ​Redox titration 
B) ​Gravimetric analysis 
C) ​Catalytic analysis 
D) ​Electro analysis 
E) ​Complexometric titration

Question 4

Identify the spectator ion(s)in the following reaction.
Zn(OH)2(s)+ 2K+(aq)+ 2OH-(aq)→ 2K+(aq)+ Zn(OH)4-(aq)

Accepted Answer

A) K+ and Zn(OH)42- 
B) K+ 
C) Zn(OH)2 
D) Zn(OH)42- 
E) K+ and OH- 
A) K+ and Zn(OH)42- 
B) K+ 
C) Zn(OH)2 
D) Zn(OH)42- 
E) K+ and OH-

Question 5

An excess of sodium sulfate was added to a 1.000-L sample of polluted water.The mass of lead (II)sulfate that precipitated was 308.88 mg.Determine the mass of lead present in the sample of water.
​Na2SO4(aq)+ Pb(NO3)2(aq)  
2NaNO3(aq)+ PbSO4(s)

Accepted Answer

A) ​108.15 mg 
B) ​88.02 mg 
C) ​180.08 mg 
D) ​145.56 mg 
E) ​211.03 mg 
A) ​108.15 mg 
B) ​88.02 mg 
C) ​180.08 mg 
D) ​145.56 mg 
E) ​211.03 mg

Question 6

What is the net ionic equation for the reaction that occurs between nitrous acid and barium hydroxide?

Accepted Answer

A) HNO2(aq)+ OH-(aq)→ NO2-(aq)+ H2O(l) 
B) 2HNO2(aq)+ Ba(OH)2 → Ba(NO2)2(aq)+ H2O(l) 
C) 2H+(aq)+ 2NO2-(aq)+ Ba2+(aq)+ 2OH-(aq)→ Ba(NO2)2(aq)+ H2O(l) 
D) 2H+(aq)+ 2NO2-(aq)+ Ba2+(aq)+ 2OH-(aq)→ Ba2+(aq)+ 2NO2-(aq)+ 2H2O(l) 
E) H+(aq)+ OH-(aq)→ H2O(l) 
A) HNO2(aq)+ OH-(aq)→ NO2-(aq)+ H2O(l) 
B) 2HNO2(aq)+ Ba(OH)2 → Ba(NO2)2(aq)+ H2O(l) 
C) 2H+(aq)+ 2NO2-(aq)+ Ba2+(aq)+ 2OH-(aq)→ Ba(NO2)2(aq)+ H2O(l) 
D) 2H+(aq)+ 2NO2-(aq)+ Ba2+(aq)+ 2OH-(aq)→ Ba2+(aq)+ 2NO2-(aq)+ 2H2O(l) 
E) H+(aq)+ OH-(aq)→ H2O(l)

Question 7

What volume of 1.08 M HCl is required to prepare 182.0 mL of 0.183 M HCl?

Accepted Answer

A) 1.07 × 103 mL 
B) 9.21 × 102 mL 
C) 30.8 mL 
D) 0.0324 mL 
E) 3.6 × 101 mL 
A) 1.07 × 103 mL 
B) 9.21 × 102 mL 
C) 30.8 mL 
D) 0.0324 mL 
E) 3.6 × 101 mL

Question 8

Which of the following reactions best describes the acid-base properties of acetic acid (HC2H3O2)in aqueous solution?

Accepted Answer

A) HC2H3O2(aq)+ H2O(l)→ H3O+(aq)+ C2H3O2-(aq) 
B) HC2H3O2(aq)+ H2O(l)→ C2H5O2+(aq)+ OH-(aq) 
C) HC2H3O2(aq)+ H2O(l)   C2H5O2+(aq)+ OH-(aq) 
D) HC2H3O2(aq)+ H2O(l)   H3O+(aq)+ C2H3O2-(aq) 
E) HC2H3O2(aq)+ 4H2O(l)   4H3O+(aq)+ C2O24-(aq) 
A) HC2H3O2(aq)+ H2O(l)→ H3O+(aq)+ C2H3O2-(aq) 
B) HC2H3O2(aq)+ H2O(l)→ C2H5O2+(aq)+ OH-(aq) 
C) HC2H3O2(aq)+ H2O(l)   C2H5O2+(aq)+ OH-(aq) 
D) HC2H3O2(aq)+ H2O(l)   H3O+(aq)+ C2H3O2-(aq) 
E) HC2H3O2(aq)+ 4H2O(l)   4H3O+(aq)+ C2O24-(aq)

Question 9

A 60.00-mL sample of a weak acid is titrated with 0.0361 M NaOH.At the endpoint,it is found that 38.23 mL of titrant was used.What was the concentration of the weak acid?

Accepted Answer

A) 0.023 M 
B) 1.38 M 
C) 0.0361 M 
D) 1.57 × 10-5 M 
E) 0.0566 M 
A) 0.023 M 
B) 1.38 M 
C) 0.0361 M 
D) 1.57 × 10-5 M 
E) 0.0566 M

Question 10

Each of the following containers illustrates a solution in which the black spheres represent solute.   Which is the most concentrated solution?

Accepted Answer

A) A 
B) All have the same concentration. 
C) B 
D) C 
E) D 
A) A 
B) All have the same concentration. 
C) B 
D) C 
E) D

Question 11

The sum of all the oxidation numbers in cysteine,   ,is

Accepted Answer

A) -1. 
B) +4. 
C) 0. 
D) -2. 
E) +2. 
A) -1. 
B) +4. 
C) 0. 
D) -2. 
E) +2.

Question 12

All of the following reactions can be described as displacement reactions except

Accepted Answer

A) CuSO4(aq)+ Ni(s)→ NiSO4(aq)+ Cu(s). 
B) 3CuCl2(aq)+ 2Al(s)→ 3Cu(s)+ 2AlCl3(aq). 
C) Fe(s)+ 2HCl(aq)→ FeCl2(g)+ H2(g). 
D) CH4(g)+ Br2(g)→ CH3Br(g)+ HBr(g). 
E) Mg(s)+ Hg(NO3)2(aq)→ Mg(NO3)2(aq)+ Hg(l). 
A) CuSO4(aq)+ Ni(s)→ NiSO4(aq)+ Cu(s). 
B) 3CuCl2(aq)+ 2Al(s)→ 3Cu(s)+ 2AlCl3(aq). 
C) Fe(s)+ 2HCl(aq)→ FeCl2(g)+ H2(g). 
D) CH4(g)+ Br2(g)→ CH3Br(g)+ HBr(g). 
E) Mg(s)+ Hg(NO3)2(aq)→ Mg(NO3)2(aq)+ Hg(l).

Question 13

What is the balanced oxidation half-reaction provided below?
Zn(s)+ 2H+(aq)→ Zn2+(aq)+ H2(g)

Accepted Answer

A) Zn2+(aq)+ 2e− → Zn(s) 
B) Zn2+(aq)+ e− → Zn(s) 
C) Zn(s)→ Zn2+(aq)+ 2e− 
D) 2H+(aq)+ 2e− → H2(g) 
E) 2H+(aq)→ H2(g)+ 2e− 
A) Zn2+(aq)+ 2e− → Zn(s) 
B) Zn2+(aq)+ e− → Zn(s) 
C) Zn(s)→ Zn2+(aq)+ 2e− 
D) 2H+(aq)+ 2e− → H2(g) 
E) 2H+(aq)→ H2(g)+ 2e−

Question 14

What is the molarity of hydrochloric acid in a solution containing 79.9 g of HCl in 245 mL of solution?

Accepted Answer

A) 0.326 M 
B) 0.00306 M 
C) 3.06 M 
D) 326 M 
E) 8.94 M 
A) 0.326 M 
B) 0.00306 M 
C) 3.06 M 
D) 326 M 
E) 8.94 M

Question 15

Which of the following is a weak base in aqueous solution?

Accepted Answer

A) HOCH2CH2OH 
B) Ba(OH)2 
C) CH3COOH 
D) NH3 
E) HBr 
A) HOCH2CH2OH 
B) Ba(OH)2 
C) CH3COOH 
D) NH3 
E) HBr

Question 16

What mass of H3PO4 (98.0 g/mol)is present in 86.3 L of a 0.0823 M solution of H3PO4?

Accepted Answer

A) 0.0724 g 
B) 0.00143 g 
C) 6.96 × 102 g 
D) 1.03 × 105 g 
E) 10.7 g 
A) 0.0724 g 
B) 0.00143 g 
C) 6.96 × 102 g 
D) 1.03 × 105 g 
E) 10.7 g

Question 17

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

Accepted Answer

A) LiCl 
B) CH3OH 
C) LiOH 
D) NH3 
E) HClO4 
A) LiCl 
B) CH3OH 
C) LiOH 
D) NH3 
E) HClO4

Question 18

Which of the following do you need to know to be able to calculate the molarity of a salt solution?
I.the mass of salt added
II.the molar mass of the salt
III.the volume of water added
IV.the total volume of the solution

Accepted Answer

A) II and III only 
B) I,II,and IV only 
C) I,II,and III only 
D) I and III only 
E) You need all of the information. 
A) II and III only 
B) I,II,and IV only 
C) I,II,and III only 
D) I and III only 
E) You need all of the information.

Question 19

What is the net ionic equation for the neutralization of hydrofluoric acid with sodium hydroxide?

Accepted Answer

A) H+(aq)+ NaOH(aq)→ H2O(l)+ Na+(aq) 
B) HF(aq)+ OH-(aq)→ H2O(l)+ F-(aq) 
C) HF(aq)+ NaOH(aq)→ H2O(l)+ NaF(aq) 
D) H+(aq)+ OH-(aq)→ H2O(l) 
E) HF(aq)+ OH-(aq)→ H2F+(aq)+ O2-(aq) 
A) H+(aq)+ NaOH(aq)→ H2O(l)+ Na+(aq) 
B) HF(aq)+ OH-(aq)→ H2O(l)+ F-(aq) 
C) HF(aq)+ NaOH(aq)→ H2O(l)+ NaF(aq) 
D) H+(aq)+ OH-(aq)→ H2O(l) 
E) HF(aq)+ OH-(aq)→ H2F+(aq)+ O2-(aq)

Exam 4: Chemical Reactions

Which of the following is best described as an acid-base reaction?

When solutions of barium iodide and lithium sulfate are mixed,the spectator ions in the resulting reaction are

_____ is a type of quantitative analysis in which the amount of a species in a material is determined by converting the species to a product that can be isolated completely and weighed.

Identify the spectator ion(s)in the following reaction. Zn(OH)2(s)+ 2K+(aq)+ 2OH-(aq)→ 2K+(aq)+ Zn(OH)4-(aq)

An excess of sodium sulfate was added to a 1.000-L sample of polluted water.The mass of lead (II)sulfate that precipitated was 308.88 mg.Determine the mass of lead present in the sample of water. ​Na2SO4(aq)+ Pb(NO3)2(aq) 2NaNO3(aq)+ PbSO4(s)

What is the net ionic equation for the reaction that occurs between nitrous acid and barium hydroxide?

What volume of 1.08 M HCl is required to prepare 182.0 mL of 0.183 M HCl?

Which of the following reactions best describes the acid-base properties of acetic acid (HC2H3O2)in aqueous solution?

A 60.00-mL sample of a weak acid is titrated with 0.0361 M NaOH.At the endpoint,it is found that 38.23 mL of titrant was used.What was the concentration of the weak acid?

Each of the following containers illustrates a solution in which the black spheres represent solute. Which is the most concentrated solution?

The sum of all the oxidation numbers in cysteine, ,is

All of the following reactions can be described as displacement reactions except

What is the balanced oxidation half-reaction provided below? Zn(s)+ 2H+(aq)→ Zn2+(aq)+ H2(g)

What is the molarity of hydrochloric acid in a solution containing 79.9 g of HCl in 245 mL of solution?

Which of the following is a weak base in aqueous solution?

What mass of H3PO4 (98.0 g/mol)is present in 86.3 L of a 0.0823 M solution of H3PO4?

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

Which of the following do you need to know to be able to calculate the molarity of a salt solution? I.the mass of salt added II.the molar mass of the salt III.the volume of water added IV.the total volume of the solution

What is the net ionic equation for the neutralization of hydrofluoric acid with sodium hydroxide?

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

Identify the spectator ion(s)in the following reaction. Zn(OH)₂(s)+ 2K⁺(aq)+ 2OH^-(aq)→ 2K⁺(aq)+ Zn(OH)₄^-(aq)

An excess of sodium sulfate was added to a 1.000-L sample of polluted water.The mass of lead (II)sulfate that precipitated was 308.88 mg.Determine the mass of lead present in the sample of water. Na₂SO₄(aq)+ Pb(NO₃)₂(aq) 2NaNO₃(aq)+ PbSO₄(s)

Which of the following reactions best describes the acid-base properties of acetic acid (HC₂H₃O₂)in aqueous solution?

What is the balanced oxidation half-reaction provided below? Zn(s)+ 2H⁺(aq)→ Zn²⁺(aq)+ H₂(g)

What mass of H₃PO₄ (98.0 g/mol)is present in 86.3 L of a 0.0823 M solution of H₃PO₄?