Question 1

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

Accepted Answer

A) acetic acid 
B) tartaric acid 
C) citric acid 
D) ascorbic acid 
E) hydrobromic acid 
A) acetic acid 
B) tartaric acid 
C) citric acid 
D) ascorbic acid 
E) hydrobromic acid

Question 2

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

Accepted Answer

A) Zn(s)+ FeCl2(aq)→ ZnCl2(aq)+ Fe(s). 
B) C6H6(l)+ Cl2(g)→ C6H5Cl(l)+ HCl(g). 
C) 2Na(s)+ 2H2O(l)→ 2NaOH(aq)+ H2(g). 
D) Cu(s)+ 2AgNO3(aq)→ Cu(NO3)2(aq)+ 2Ag(s). 
E) CuSO4(aq)+ Fe(s)→ Cu(s)+ FeSO4(aq). 
A) Zn(s)+ FeCl2(aq)→ ZnCl2(aq)+ Fe(s). 
B) C6H6(l)+ Cl2(g)→ C6H5Cl(l)+ HCl(g). 
C) 2Na(s)+ 2H2O(l)→ 2NaOH(aq)+ H2(g). 
D) Cu(s)+ 2AgNO3(aq)→ Cu(NO3)2(aq)+ 2Ag(s). 
E) CuSO4(aq)+ Fe(s)→ Cu(s)+ FeSO4(aq).

Question 3

How many grams of lithium nitrate,LiNO3 (68.9 g/mol),are required to prepare 778.4 mL of a 0.825 M LiNO3 solution?

Accepted Answer

A) 0.00932 g 
B) 44.2 g 
C) 0.0226 g 
D) 65 g 
E) 0.0136 g 
A) 0.00932 g 
B) 44.2 g 
C) 0.0226 g 
D) 65 g 
E) 0.0136 g

Question 4

Which equation best represents the net ionic equation for the reaction that occurs when aqueous solutions of potassium phosphate and iron(II)nitrate are mixed?

Accepted Answer

A) 3Fe2+(aq)+ 2PO43-(aq)→ Fe3(PO4)2(s) 
B) 2K+(aq)+ Fe(NO3)2(aq)→ 2KNO3(aq)+ Fe2+(aq) 
C) 3Fe2+(aq)+ 2PO43-(aq)→ Fe3(PO4)2(aq) 
D) 2K3PO4(aq)+ 3Fe2+(aq)→ Fe3(PO4)2(s)+ (K+)6(aq) 
E) 2K3PO4(aq)+ 3Fe(NO3)2(aq)→ Fe3(PO4)2(s)+ 6KNO3(aq) 
A) 3Fe2+(aq)+ 2PO43-(aq)→ Fe3(PO4)2(s) 
B) 2K+(aq)+ Fe(NO3)2(aq)→ 2KNO3(aq)+ Fe2+(aq) 
C) 3Fe2+(aq)+ 2PO43-(aq)→ Fe3(PO4)2(aq) 
D) 2K3PO4(aq)+ 3Fe2+(aq)→ Fe3(PO4)2(s)+ (K+)6(aq) 
E) 2K3PO4(aq)+ 3Fe(NO3)2(aq)→ Fe3(PO4)2(s)+ 6KNO3(aq)

Question 5

Which of the following chemical equations best represents the dissolution of a soluble group 2A metal hydroxide in water?

Accepted Answer

A) M(OH)2(s)→ M+(aq)+ (OH)2-(aq) 
B) M(OH)2(s)→ M2+(aq)+ 2OH-(aq) 
C) M(OH)2(s)+ H2O(l)→ MO(aq)+ OH-(aq)+ H3O+(aq) 
D) M(OH)2(s)→ M(OH)2(aq) 
E) M(OH)2(s)→ MO(aq)+ H2O(l) 
A) M(OH)2(s)→ M+(aq)+ (OH)2-(aq) 
B) M(OH)2(s)→ M2+(aq)+ 2OH-(aq) 
C) M(OH)2(s)+ H2O(l)→ MO(aq)+ OH-(aq)+ H3O+(aq) 
D) M(OH)2(s)→ M(OH)2(aq) 
E) M(OH)2(s)→ MO(aq)+ H2O(l)

Question 6

What mass of Na2CO3 is present in 0.450 L of a 0.704 M Na2CO3 solution?

Accepted Answer

A) 33.5 g 
B) 47.6 g 
C) 74.6 g 
D) 67.7 g 
E) 165 g 
A) 33.5 g 
B) 47.6 g 
C) 74.6 g 
D) 67.7 g 
E) 165 g

Question 7

Which of the following reactions best describes the dissolution of gaseous hydrogen chloride (HCl)in water?

Accepted Answer

A) HCl(g)+ 2H2O(l)→ H3O+(aq)+ ClO-(aq)+ H2(g) 
B) 2HCl(g)→ H2(g)+ Cl2(g) 
C) HCl(g)+ H2O(l)→ H3O+(aq)+ Cl-(aq) 
D) HCl(g)+ 5H2O(l)→ H3O+(aq)+ ClO4-(aq)+ 4H2(g) 
E) HCl(g)+ H2O(l)→ H3O+(aq)+ ClO-(aq) 
A) HCl(g)+ 2H2O(l)→ H3O+(aq)+ ClO-(aq)+ H2(g) 
B) 2HCl(g)→ H2(g)+ Cl2(g) 
C) HCl(g)+ H2O(l)→ H3O+(aq)+ Cl-(aq) 
D) HCl(g)+ 5H2O(l)→ H3O+(aq)+ ClO4-(aq)+ 4H2(g) 
E) HCl(g)+ H2O(l)→ H3O+(aq)+ ClO-(aq)

Question 8

What is the net ionic equation for the reaction of acetic acid,CH3COOH,with NH3?

Accepted Answer

A) CH3COOH(aq)+ NH3(aq)→ NH4+(aq)+ CH3COO-(aq) 
B) H+(aq)+ OH-(aq)→ H2O(l) 
C) CH3COOH(aq)+ NH3(aq)→ NH4CH3COO(aq) 
D) CH3COO-(aq)+ H+(aq)+ NH3(aq)→ NH4CH3COO(aq) 
E) H+(aq)+ NH3(aq)→ NH4+(aq) 
A) CH3COOH(aq)+ NH3(aq)→ NH4+(aq)+ CH3COO-(aq) 
B) H+(aq)+ OH-(aq)→ H2O(l) 
C) CH3COOH(aq)+ NH3(aq)→ NH4CH3COO(aq) 
D) CH3COO-(aq)+ H+(aq)+ NH3(aq)→ NH4CH3COO(aq) 
E) H+(aq)+ NH3(aq)→ NH4+(aq)

Question 9

The oxidation number of carbon in the formate ion,HCOO-,is

Accepted Answer

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

Question 10

A 38.0-g sample of NaOH is dissolved in water,and the solution is diluted to give a final volume of 1.70 L.The molarity of the final solution is

Accepted Answer

A) 22.3 M. 
B) 0.558 M. 
C) 0.95 M. 
D) 0.0447 M. 
E) 0.619 M. 
A) 22.3 M. 
B) 0.558 M. 
C) 0.95 M. 
D) 0.0447 M. 
E) 0.619 M.

Question 11

In the following reaction,which species is oxidized?
3Li2S(s)+ 8H+(aq)+ 2NO3-(aq)→ 6Li+(aq)+ 3S(s)+ 2NO(g)+ 4H2O(l)

Accepted Answer

A) NO3- 
B) Li2S 
C) Li+ 
D) NO 
E) H+ 
A) NO3- 
B) Li2S 
C) Li+ 
D) NO 
E) H+

Question 12

Which of the following is not a strong base in aqueous solution?

Accepted Answer

A) Sr(OH)2 
B) Ca(OH)2 
C) KOH 
D) LiOH 
E) NH3 
A) Sr(OH)2 
B) Ca(OH)2 
C) KOH 
D) LiOH 
E) NH3

Question 13

The net ionic equation for the reaction of nitrous acid with sodium hydroxide is

Accepted Answer

A) H+(aq)+ OH-(aq)→ H2O(l). 
B) HNO2(aq)+ OH-(aq)→ NO2-(aq)+ H2O(l). 
C) HNO3(aq)+ NaOH(aq)→ NaNO3(aq)+ H2O(l). 
D) HNO3(aq)+ NaOH(aq)→ Na+(aq)+ NO3-(aq)+ H2O(l). 
E) H+(aq)+ NO2-(aq)+ Na+(aq)+ OH-(aq)→ Na+(aq)+ NO2-(aq)+ H2O(l). 
A) H+(aq)+ OH-(aq)→ H2O(l). 
B) HNO2(aq)+ OH-(aq)→ NO2-(aq)+ H2O(l). 
C) HNO3(aq)+ NaOH(aq)→ NaNO3(aq)+ H2O(l). 
D) HNO3(aq)+ NaOH(aq)→ Na+(aq)+ NO3-(aq)+ H2O(l). 
E) H+(aq)+ NO2-(aq)+ Na+(aq)+ OH-(aq)→ Na+(aq)+ NO2-(aq)+ H2O(l).

Question 14

What is the reduction half-reaction for the reaction between iron(II)sulfate and potassium permanganate in a sulfuric acid solution?
5Fe2+(aq)+ MnO4-(aq)+ 8H+(aq)→ 5Fe3+(aq)+ Mn2+(aq)+ 4H2O(l)

Accepted Answer

A) MnO4-(aq)+ 3e- → Mn2+(aq)+ 4H2O(l) 
B) MnO4-(aq)+ 8H+(aq)+ 5e- → Mn2+(aq)+ 4H2O(l) 
C) 5Fe2+(aq)→ 5Fe3+(aq)+ 5e- 
D) Fe2+(aq)+ 2e- → Fe(s) 
E) MnO4-(aq)+ 5e- → Mn2+(aq)+ SO42-(aq) 
A) MnO4-(aq)+ 3e- → Mn2+(aq)+ 4H2O(l) 
B) MnO4-(aq)+ 8H+(aq)+ 5e- → Mn2+(aq)+ 4H2O(l) 
C) 5Fe2+(aq)→ 5Fe3+(aq)+ 5e- 
D) Fe2+(aq)+ 2e- → Fe(s) 
E) MnO4-(aq)+ 5e- → Mn2+(aq)+ SO42-(aq)

Question 15

A student is given a sample in lab that contains one of the ions listed below.After adding a few drops of AgNO3 solution to a portion of the unknown sample,the student observed a grayish precipitate.After adding a few drops of Mg(NO3)2 solution to another portion of the unknown sample,the student got a black precipitate.Based on these observations,what is the only possible ion in this student's sample?

Accepted Answer

A) Cl- 
B) F- 
C) C2H3O2- 
D) S2- 
E) SO42- 
A) Cl- 
B) F- 
C) C2H3O2- 
D) S2- 
E) SO42-

Question 16

Which of the following would not be depicted as the individual ions on the reactant side of a complete ionic reaction?

Accepted Answer

A) RbOH 
B) HNO3 
C) ZnCl2 
D) CH3COOH 
E) TiI3 
A) RbOH 
B) HNO3 
C) ZnCl2 
D) CH3COOH 
E) TiI3

Question 17

The oxidation numbers of nitrogen in N2O and N2F4 are,respectively,

Accepted Answer

A) -2 and +2. 
B) -2 and -3. 
C) +1 and +2. 
D) +1 and -1. 
E) +1 and -3. 
A) -2 and +2. 
B) -2 and -3. 
C) +1 and +2. 
D) +1 and -1. 
E) +1 and -3.

Question 18

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

Accepted Answer

A) HOCH2CH2OH 
B) Sr(OH)2 
C) H3PO4 
D) NH3 
E) HF 
A) HOCH2CH2OH 
B) Sr(OH)2 
C) H3PO4 
D) NH3 
E) HF

Question 19

A dilute solution is prepared by transferring 20.00 mL of a 0.3965 M stock solution to a 900.0 mL volumetric flask and diluting to mark.What is the molarity of this dilute solution?
​

Accepted Answer

A) 0.008811 M 
B) 0.01762 M 
C) 0.1784 M 
D) 0.002202 M 
E) 0.1982 M 
A) 0.008811 M 
B) 0.01762 M 
C) 0.1784 M 
D) 0.002202 M 
E) 0.1982 M

Question 20

A student must prepare 7.00 L of 0.100 M Na2CO3 (106 g/mol).Which is the best procedure for preparing this solution?

Accepted Answer

A) Measure 74.2 g Na2CO3 and add 7.00 kg of H2O. 
B) Measure 10.6 g Na2CO3 and add 7.00 kg of H2O. 
C) Measure 74.2 g Na2CO3 and add H2O until the final homogeneous solution has a volume of 7.00 L. 
D) Measure 10.6 g Na2CO3 and add H2O until the final homogeneous solution has a volume of 7.00 L. 
E) Measure 74.2 g Na2CO3 and add 7.00 L of H2O. 
A) Measure 74.2 g Na2CO3 and add 7.00 kg of H2O. 
B) Measure 10.6 g Na2CO3 and add 7.00 kg of H2O. 
C) Measure 74.2 g Na2CO3 and add H2O until the final homogeneous solution has a volume of 7.00 L. 
D) Measure 10.6 g Na2CO3 and add H2O until the final homogeneous solution has a volume of 7.00 L. 
E) Measure 74.2 g Na2CO3 and add 7.00 L of H2O.

Exam 4: Chemical Reactions

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

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

How many grams of lithium nitrate,LiNO3 (68.9 g/mol),are required to prepare 778.4 mL of a 0.825 M LiNO3 solution?

Which equation best represents the net ionic equation for the reaction that occurs when aqueous solutions of potassium phosphate and iron(II)nitrate are mixed?

Which of the following chemical equations best represents the dissolution of a soluble group 2A metal hydroxide in water?

What mass of Na2CO3 is present in 0.450 L of a 0.704 M Na2CO3 solution?

Which of the following reactions best describes the dissolution of gaseous hydrogen chloride (HCl)in water?

What is the net ionic equation for the reaction of acetic acid,CH3COOH,with NH3?

The oxidation number of carbon in the formate ion,HCOO-,is

A 38.0-g sample of NaOH is dissolved in water,and the solution is diluted to give a final volume of 1.70 L.The molarity of the final solution is

In the following reaction,which species is oxidized? 3Li2S(s)+ 8H+(aq)+ 2NO3-(aq)→ 6Li+(aq)+ 3S(s)+ 2NO(g)+ 4H2O(l)

Which of the following is not a strong base in aqueous solution?

The net ionic equation for the reaction of nitrous acid with sodium hydroxide is

What is the reduction half-reaction for the reaction between iron(II)sulfate and potassium permanganate in a sulfuric acid solution? 5Fe2+(aq)+ MnO4-(aq)+ 8H+(aq)→ 5Fe3+(aq)+ Mn2+(aq)+ 4H2O(l)

Which of the following would not be depicted as the individual ions on the reactant side of a complete ionic reaction?

The oxidation numbers of nitrogen in N2O and N2F4 are,respectively,

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

A dilute solution is prepared by transferring 20.00 mL of a 0.3965 M stock solution to a 900.0 mL volumetric flask and diluting to mark.What is the molarity of this dilute solution? ​

A student must prepare 7.00 L of 0.100 M Na2CO3 (106 g/mol).Which is the best procedure for preparing this solution?

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How many grams of lithium nitrate,LiNO₃ (68.9 g/mol),are required to prepare 778.4mL of a 0.825 M LiNO₃ solution?

What mass of Na₂CO₃ is present in 0.450 L of a 0.704 M Na₂CO₃ solution?

What is the net ionic equation for the reaction of acetic acid,CH₃COOH,with NH₃?

The oxidation number of carbon in the formate ion,HCOO^-,is

In the following reaction,which species is oxidized? 3Li₂S(s)+ 8H⁺(aq)+ 2NO₃^-(aq)→ 6Li⁺(aq)+ 3S(s)+ 2NO(g)+ 4H₂O(l)

What is the reduction half-reaction for the reaction between iron(II)sulfate and potassium permanganate in a sulfuric acid solution? 5Fe²⁺(aq)+ MnO₄^-(aq)+ 8H⁺(aq)→ 5Fe³⁺(aq)+ Mn²⁺(aq)+ 4H₂O(l)

The oxidation numbers of nitrogen in N₂O and N₂F₄ are,respectively,

A dilute solution is prepared by transferring 20.00 mL of a 0.3965 M stock solution to a 900.0 mL volumetric flask and diluting to mark.What is the molarity of this dilute solution?

A student must prepare 7.00 L of 0.100 M Na₂CO₃ (106 g/mol).Which is the best procedure for preparing this solution?