Question 1

Predict the product(s)  for the following reaction. MgCO3(s)  3(s)    A)  MgO2(s)  + CO(g)  B)  MgO(s)  + CO2 C)  Mg(s)  + CO2(g)  + O2(g)  D)  Mg2+(s)  + CO2(g)  + O2(g)  E)  No reaction occurs." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)   MgO2(s)  + CO(g) 
B)   MgO(s)  + CO2
C)   Mg(s)  + CO2(g)  + O2(g) 
D)   Mg2+(s)  + CO2(g)  + O2(g) 
E)   No reaction occurs.F) All of the above
G) B) and E)

Question 2

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) B) and D)
G) B) and C)

Question 3

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) B) and E)
G) D) and E)

Question 4

What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

Accepted Answer

A)   0.800 L
B)   0.400 L
C)   0.200 L
D)   0.100 L
E)   None of these choices are correct.F) B) and C)
G) A) and C)

Question 5

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 6

What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

Accepted Answer

A)   330 mL
B)   210 mL
C)   86 mL
D)   60 mL
E)   7.3 mLF) C) and E)
G) C) and D)

Question 7

Predict the product(s)  for the following reaction. Cl2O7(g)  + H2O(l)  →

Accepted Answer

A)   HClO4(aq) 
B)   H2ClO4(aq) 
C)   H(ClO4) 2(aq) 
D)   HCl(aq)  + O2(g) 
E)   HClO3(aq) F) A) and D)
G) B) and D)

Question 8

When 2.61 g of solid Na2CO3 is dissolved in sufficient water to make 250. mL of solution, the concentration of Na2CO3 is:

Accepted Answer

A)   0.0246 M
B)   10.4 M
C)   0.205 M
D)   0.0985 M
E)   0.141 MF) C) and E)
G) B) and D)

Question 9

Which one of the following is a redox reaction?

Accepted Answer

A)   2Na(g)  + Cl2(g)  → 2NaCl(s) 
B)   Ba2+(aq)  + SO42-(aq)  → BaSO4(s) 
C)   K2Cr2O7(aq)  + 2KOH(aq)  → 2K2CrO4(aq)  + H2O(l) 
D)   Na2CO3(s)  + 2HCl(aq)  → 2NaCl(aq)  + CO2(g)  + H2O(l) 
E)   H2O(l)  → H+(aq)  + OH-(aq) F) All of the above
G) C) and D)

Question 10

Reduction is the loss of electrons.

Accepted Answer

A) True 
 B)False

Question 11

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 12

A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

Accepted Answer

A)   0.0524 M
B)   0.888 M
C)   1.13 M
D)   2.26 M
E)   2.43 MF) A) and E)
G) A) and B)

Question 13

Which, if any, of the following properties applies to weak acids?

Accepted Answer

A)   They are strong electrolytes.
B)   They are excellent conductors of electricity.
C)   When dissolved in water, they do not ionize completely.
D)   All of these choices are correct.
E)   None of these choices are correct.F) D) and E)
G) B) and E)

Question 14

Select the net ionic equation for the reaction between sodium chloride and mercury(I)  nitrate. 2NaCl(aq)  + Hg2(NO3) 2(aq)  → 2NaNO3(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 E)
G) A) and D)

Question 15

Select the classification for the following reaction. CaCl2·H2O(s)  2·H2O(s)    CaCl2(s)  + H2O(g)  A)  Combination B)  Decomposition C)  Displacement D)  Acid-base E)  Precipitation" class="answers-bank-image d-inline" rel="preload" > CaCl2(s)  + H2O(g)

Accepted Answer

A)   Combination
B)   Decomposition
C)   Displacement
D)   Acid-base
E)   PrecipitationF) A) and E)
G) B) and C)

Question 16

Select the classification for the following reaction. Fe2+(aq)  + 2OH-(aq)  → Fe(OH) 2(s)

Accepted Answer

A)   Precipitation
B)   Acid-base
C)   Redox
D)   Decomposition
E)   None of these choices are correct.F) D) and E)
G) B) and E)

Question 17

Calculate the oxidation number of the chlorine in perchloric acid, HClO4, a strong oxidizing agent.

Accepted Answer

A)   -1
B)   +4
C)   +5
D)   +7
E)   None of these choices are correct.F) A) and B)
G) A) and C)

Question 18

Covalent compounds, dissolved in water, never produce conducting solutions.

Accepted Answer

A) True 
 B)False

Question 19

Select the classification for the following reaction. H2(g)  + Cl2(g)  → 2HCl(g)

Accepted Answer

A)   Combination
B)   Decomposition
C)   Displacement
D)   Acid-base
E)   None of these choices are correct.F) B) and C)
G) C) and D)

Question 20

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq)  + Na2CO3(aq)  →

Accepted Answer

A)   copper(I)  carbonate, Cu2CO3
B)   copper(II)  carbonate, Cu2CO3
C)   copper(I)  carbonate, CuCO3
D)   copper(II)  carbonate, CuCO3
E)   sodium chloride, NaClF) A) and B)
G) B) and E)

Exam 4: Three Major Classes of Chemical Reactions

What volume, in L, of 10.0 M HCl is needed to make 2.00 L of 2.00 M HCl solution by dilution with water?

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

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When 2.61 g of solid Na2CO3 is dissolved in sufficient water to make 250. mL of solution, the concentration of Na2CO3 is:

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

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Select the classification for the following reaction. Fe2+(aq) + 2OH-(aq) → Fe(OH) 2(s)

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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl2(aq) + Na2CO3(aq) →

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Which, if any, of the following properties applies to weak acids?

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Select the classification for the following reaction. CaCl2·H2O(s) CaCl2(s) + H2O(g)

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

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Calculate the oxidation number of the chlorine in perchloric acid, HClO4, a strong oxidizing agent.

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What will be the final volume of a solution prepared by diluting 25 mL of 8.25 M sodium hydroxide to a concentration of 2.40 M?

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Predict the product(s) for the following reaction. Cl2O7(g) + H2O(l) →

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Which one of the following is a redox reaction?

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Covalent compounds, dissolved in water, never produce conducting solutions.

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A standard solution of 0.243 M NaOH was used to determine the concentration of a hydrochloric acid solution. If 46.33 mL of NaOH is needed to neutralize 10.00 mL of the acid, what is the molar concentration of the acid?

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Predict the product(s) for the following reaction. MgCO3(s)

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Select the classification for the following reaction. H2(g) + Cl2(g) → 2HCl(g)

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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.

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

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Reduction is the loss of electrons.

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

Correct Answer
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When 2.61 g of solid Na₂CO₃ is dissolved in sufficient water to make 250. mL of solution, the concentration of Na₂CO₃ is:

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

Correct Answer
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Select the classification for the following reaction. Fe₂₊(aq) + 2OH_-(aq) → Fe(OH) ₂(s)

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Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CuCl₂(aq) + Na₂CO₃(aq) →

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Select the classification for the following reaction. CaCl₂·H₂O(s) CaCl₂(s) + H₂O(g)

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

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Calculate the oxidation number of the chlorine in perchloric acid, HClO₄, a strong oxidizing agent.

Correct Answer
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Correct Answer
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Predict the product(s) for the following reaction. Cl₂O₇(g) + H₂O(l) →

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Predict the product(s) for the following reaction. MgCO₃(s)

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Select the classification for the following reaction. H₂(g) + Cl₂(g) → 2HCl(g)

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

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