Question 1

Select the classification for the following reaction. 2Ag+(aq)  + Zn(s)   2Ag(s)  + Zn2+(aq)

Accepted Answer

A)   displacement
B)   decomposition
C)   combination
D)   precipitation
E)   acid-baseF) A) and B)
G) A) and C)

Question 2

Select the classification for the following reaction. 2NaCl(l)  2(g)  A)  acid-base B)  precipitation C)  combination D)  displacement E)  decomposition" class="answers-bank-image d-inline" rel="preload" > 2Na(l)  + Cl2(g)

Accepted Answer

A)   acid-base
B)   precipitation
C)   combination
D)   displacement
E)   decompositionF) None of the above
G) A) and E)

Question 3

Which one of the following substances is the best electrolyte?

Accepted Answer

A)   CO
B)   CH3Cl
C)   CH4
D)   C2H5OH
E)   HClF) B) and C)
G) A) and C)

Question 4

Select the precipitate that forms when aqueous lead(II)  nitrate reacts with aqueous sodium sulfate.

Accepted Answer

A)   NaNO3
B)   Na2NO3
C)   PbSO4
D)   Pb2SO4
E)   PbSF) A) and B)
G) A) and C)

Question 5

Which of the following is most soluble in water?

Accepted Answer

A)   benzene, C6H6
B)   potassium nitrate, KNO3
C)   carbon tetrachloride, CCl4
D)   hexane, C6H14
E)   ethane, C2H4F) A) and C)
G) B) and C)

Question 6

Sulfuric acid (H2SO4) reacts with potassium hydroxide (KOH) as follows.
H2SO4(aq) + 2KOH(aq) F1F1F1S1F1F1F10 K2SO4(aq) + 2H2O(l)
Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH. Show all your work.

Accepted Answer

Question 7

An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium chromate, Na2CrO4, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Accepted Answer

Pb²⁺(aq) + C...

Question 8

How many moles of ions are released when 0.27 mol of cobalt(II)  chloride, CoCl2, is dissolved in water?

Accepted Answer

A)   0.81 mol
B)   0.54 mol
C)   0.27 mol
D)   0.18 mol
E)   0.090 molF) A) and B)
G) All of the above

Question 9

Which of the following is a weak base?

Accepted Answer

A)   NH3
B)   Ca(OH) 2
C)   Ba(OH) 2
D)   NaOH
E)   CH3COOHF) A) and C)
G) C) and E)

Question 10

For each of the following species, write down, next to the formula, the oxidation number of the indicated atom.
a. P in H2PO2-
b. S in Na2S2O3
c. C in CH2O

Accepted Answer

Question 11

In a redox reaction, the oxidizing agent undergoes loss of electrons.

Accepted Answer

A) True 
 B)False

Question 12

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq)  + BaCl2(aq)  

Accepted Answer

A)   Ba2CO3
B)   BaCO3
C)   NaCl
D)   NaCl2
E)   BaOF) A) and C)
G) None of the above

Question 13

Select the classification for the following reaction. 2H2O2(aq)   2H2O(l)  + O2(g)

Accepted Answer

A)   combination
B)   decomposition
C)   displacement
D)   acid-base
E)   none of the aboveF) B) and C)
G) A) and E)

Question 14

The correct method for preparing one liter of a 1.0 M solution of X is to dissolve exactly one mole of X in exactly one liter of water.

Accepted Answer

A) True 
 B)False

Question 15

Select the precipitate that forms when the following reactants are mixed. 
Mg(CH3COO) 2(aq)  + LiOH(aq)  

Accepted Answer

A)   LiCH3COO
B)   Li(CH3COO) 2
C)   MgOH
D)   Mg(OH) 2
E)   CH3OHF) None of the above
G) A) and B)

Question 16

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Accepted Answer

A)   CaCl2
B)   HNO3
C)   NH3
D)   C6H12O6 (glucose) 
E)   CO2F) All of the above
G) B) and E)

Question 17

Consider the reaction: 
3Co2+(aq)  + 6NO3-(aq)  + 6Na+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s)  + 6Na+(aq)  + 6NO3-(aq) 
Identify the net ionic equation for this reaction.

Accepted Answer

A)   Na+(aq)  + NO3-(aq)   NaNO3(aq) 
B)   3Co2+(aq)  + NO3-(aq)  + Na+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s)  + NaNO3(aq) 
C)   3Co2+(aq)  + 6NO3-(aq)  + 6Na+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s)  + 6NaNO3(aq) 
D)   3Co2+(aq)  + 2PO43-(aq)   Co3(PO4) 2(s) 
E)   None of the above is the correct net ionic equation.F) A) and B)
G) C) and D)

Question 18

Select the net ionic equation for the reaction between sodium chloride and mercury(I)  nitrate. 2NaCl(aq)  + Hg2(NO3) 2(aq)   NaNO3(aq)  + Hg2Cl2(s)

Accepted Answer

A)   Na+(aq)  + NO3-(aq)   NaNO3(aq) 
B)   Hg22+(aq)  + 2Cl-(aq)   Hg2Cl2(s) 
C)   NaCl(aq)   Na+(aq)  + Cl-(aq) 
D)   Hg2(NO3) 2(aq)   Hg22+(aq)  + 2NO3-(aq) 
E)   Hg22+(aq)   Hg2(s) F) A) and B)
G) A) and C)

Question 19

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 ( 3 (   = 84.02 g/mol) ? HCl(aq)  + NaHCO3(s)   NaCl(s)  + H2O(l)  + CO2(g)  A)  638 mL B)  572 mL C)  536 mL D)  276 mL E)  175 mL" class="answers-bank-image d-inline" rel="preload" > = 84.02 g/mol) ? HCl(aq)  + NaHCO3(s)   NaCl(s)  + H2O(l)  + CO2(g)

Accepted Answer

A)   638 mL
B)   572 mL
C)   536 mL
D)   276 mL
E)   175 mLF) B) and D)
G) D) and E)

Question 20

In each of the following cases, write down the oxidation number of the indicated atom.
a. P in P4
b. C in C2H6
c. S in H2SO4
d. Mn in MnO4-
e. S in S4O62-
f. P in Na3PO4

Accepted Answer

a. 0
b. -3...

Exam 4: The Major Classes of Chemical Reactions

Consider the reaction: 3Co2+(aq) + 6NO3-(aq) + 6Na+(aq) + 2PO43-(aq)  Co3(PO4) 2(s) + 6Na+(aq) + 6NO3-(aq) Identify the net ionic equation for this reaction.

Correct AnswerverifiedShow Answer

Select the precipitate that forms when aqueous lead(II) nitrate reacts with aqueous sodium sulfate.

Correct AnswerverifiedShow Answer

Which one of the following substances, when dissolved in water at equal molar concentrations, will give the solution with the lowest electrical conductivity?

Correct AnswerverifiedShow Answer

Select the precipitate that forms when the following reactants are mixed. Mg(CH3COO) 2(aq) + LiOH(aq) 

Correct AnswerverifiedShow Answer

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3 ( = 84.02 g/mol) ? HCl(aq) + NaHCO3(s)  NaCl(s) + H2O(l) + CO2(g)

Correct AnswerverifiedShow Answer

In a redox reaction, the oxidizing agent undergoes loss of electrons.

Correct AnswerverifiedShow Answer

Which of the following is most soluble in water?

Correct AnswerverifiedShow Answer

An aqueous solution of lead nitrate, Pb(NO3)2, is mixed with one of sodium chromate, Na2CrO4, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Correct AnswerverifiedPb2+(aq) + C...View AnswerShow Answer

The correct method for preparing one liter of a 1.0 M solution of X is to dissolve exactly one mole of X in exactly one liter of water.

Correct AnswerverifiedShow Answer

Select the classification for the following reaction. 2Ag+(aq) + Zn(s)  2Ag(s) + Zn2+(aq)

Correct AnswerverifiedShow Answer

Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl2(g)

Correct AnswerverifiedShow Answer

Select the net ionic equation for the reaction between sodium chloride and mercury(I) nitrate. 2NaCl(aq) + Hg2(NO3) 2(aq)  NaNO3(aq) + Hg2Cl2(s)

Correct AnswerverifiedShow Answer

For each of the following species, write down, next to the formula, the oxidation number of the indicated atom. a. P in H2PO2- b. S in Na2S2O3 c. C in CH2O

Correct AnswerverifiedShow Answer

In each of the following cases, write down the oxidation number of the indicated atom. a. P in P4 b. C in C2H6 c. S in H2SO4 d. Mn in MnO4- e. S in S4O62- f. P in Na3PO4

Correct Answerverifieda. 0b. -3...View AnswerShow Answer

Which one of the following substances is the best electrolyte?

Correct AnswerverifiedShow Answer

Select the classification for the following reaction. 2H2O2(aq)  2H2O(l) + O2(g)

Correct AnswerverifiedShow Answer

Which of the following is a weak base?

Correct AnswerverifiedShow Answer

Sulfuric acid (H2SO4) reacts with potassium hydroxide (KOH) as follows. H2SO4(aq) + 2KOH(aq)  K2SO4(aq) + 2H2O(l) Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH. Show all your work.

Correct AnswerverifiedShow Answer

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl2, is dissolved in water?

Correct AnswerverifiedShow Answer

Select the precipitate that forms when the following reactants are mixed. Na2CO3(aq) + BaCl2(aq) 

Correct AnswerverifiedShow Answer

Consider the reaction: 3Co²⁺(aq) + 6NO₃^-(aq) + 6Na⁺(aq) + 2PO₄^3-(aq)  Co₃(PO₄) ₂(s) + 6Na⁺(aq) + 6NO₃^-(aq) Identify the net ionic equation for this reaction.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Select the precipitate that forms when the following reactants are mixed. Mg(CH₃COO) ₂(aq) + LiOH(aq) 

Correct Answer
verified

How many milliliters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO₃( = 84.02 g/mol) ? HCl(aq) + NaHCO₃(s)  NaCl(s) + H₂O(l) + CO₂(g)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

An aqueous solution of lead nitrate, Pb(NO₃)₂, is mixed with one of sodium chromate, Na₂CrO₄, resulting in the formation of a precipitate of lead chromate. Write a balanced net ionic equation for this precipitation reaction, showing all phases.

Correct Answer
verified
Pb²⁺(aq) + C...
View Answer

Correct Answer
verified

Select the classification for the following reaction. 2Ag⁺(aq) + Zn(s)  2Ag(s) + Zn²⁺(aq)

Correct Answer
verified

Select the classification for the following reaction. 2NaCl(l) 2Na(l) + Cl₂(g)

Correct Answer
verified

Select the net ionic equation for the reaction between sodium chloride and mercury(I) nitrate. 2NaCl(aq) + Hg₂(NO₃) ₂(aq)  NaNO₃(aq) + Hg₂Cl₂(s)

Correct Answer
verified

For each of the following species, write down, next to the formula, the oxidation number of the indicated atom. a. P in H₂PO₂^- b. S in Na₂S₂O₃ c. C in CH₂O

Correct Answer
verified

In each of the following cases, write down the oxidation number of the indicated atom. a. P in P₄ b. C in C₂H₆ c. S in H₂SO₄ d. Mn in MnO₄^- e. S in S₄O₆^2- f. P in Na₃PO₄

Correct Answer
verified
a. 0
b. -3...
View Answer

Correct Answer
verified

Select the classification for the following reaction. 2H₂O₂(aq)  2H₂O(l) + O₂(g)

Correct Answer
verified

Correct Answer
verified

Sulfuric acid (H₂SO₄) reacts with potassium hydroxide (KOH) as follows. H₂SO₄(aq) + 2KOH(aq)  K₂SO₄(aq) + 2H₂O(l) Calculate the volume of 0.100 M sulfuric acid required to neutralize 25.0 mL of 0.0821 M KOH. Show all your work.

Correct Answer
verified

How many moles of ions are released when 0.27 mol of cobalt(II) chloride, CoCl₂, is dissolved in water?

Correct Answer
verified

Select the precipitate that forms when the following reactants are mixed. Na₂CO₃(aq) + BaCl₂(aq) 

Correct Answer
verified