Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

A 0.00100 mol sample of Ca(OH)2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH)2(s) + 2HCl(aq) F1F1F1S1F1F1F10 CaCl2(aq) + H2O(l)

Accepted Answer

A)  0.0200 M 
B)  0.0400 M 
C)  0.0800 M 
D)  4.00 × 10-5 M 
E)  none of the above 
A)  0.0200 M 
B)  0.0400 M 
C)  0.0800 M 
D)  4.00 × 10-5 M 
E)  none of the above

Question 3

In the following reaction, what ions, if any, are spectator ions? 
Pb(NO3)2(aq) + 2NaCl(aq) F1F1F1S1F1F1F10 PbCl2(s) + 2NaNO3(aq)

Accepted Answer

A)  Pb2+(aq), Cl-(aq) 
B)  Na+(aq), NO3-(aq) 
C)  Pb2+(aq), NO3-(aq) 
D)  Na+(aq), Cl-(aq) 
E)  There are no spectator ions. 
A)  Pb2+(aq), Cl-(aq) 
B)  Na+(aq), NO3-(aq) 
C)  Pb2+(aq), NO3-(aq) 
D)  Na+(aq), Cl-(aq) 
E)  There are no spectator ions.

Question 4

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

Accepted Answer

A) True 
 B)False

Question 5

You are provided with a 250 mL volumetric flask, deionized water, and solid NaOH. How much NaOH should be weighed out in order to make 250. mL of 0.100 M solution?

Accepted Answer

The answer of You are provided with a 250 mL...

Question 6

Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Accepted Answer

A)  K2CO3 
B)  NaI 
C)  MgCl2 
D)  CH3OH 
E)  NH4Cl 
A)  K2CO3 
B)  NaI 
C)  MgCl2 
D)  CH3OH 
E)  NH4Cl

Question 7

Which one of the following ionic compounds is insoluble in water?

Accepted Answer

A)  Na3PO4 
B)  AgNO3 
C)  NaCl 
D)  CaCO3 
E)  MgCl2 
A)  Na3PO4 
B)  AgNO3 
C)  NaCl 
D)  CaCO3 
E)  MgCl2

Question 8

What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

Accepted Answer

A)  H+ and OH- 
B)  H+ and Rb+ 
C)  Rb+ and Br- 
D)  Br- and OH- 
E)  There are no spectator ions in this reaction. 
A)  H+ and OH- 
B)  H+ and Rb+ 
C)  Rb+ and Br- 
D)  Br- and OH- 
E)  There are no spectator ions in this reaction.

Question 9

A solution of methanol (CH4O) in water has a concentration of 0.200 M. What mass of methanol, in grams, is present in 0.150 liters of this solution?

Accepted Answer

Question 10

Calculate the oxidation number of sulfur in sodium metabisulfite, Na2S2O5.

Accepted Answer

A)  -2 
B)  +2 
C)  +4 
D)  +5 
E)  None of the above is the correct oxidation number. 
A)  -2 
B)  +2 
C)  +4 
D)  +5 
E)  None of the above is the correct oxidation number.

Question 11

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq) + (NH4)3PO4(aq) F1F1F1S1F1F1F10

Accepted Answer

A)  cobalt(II) phosphate, Co3(PO4)2 
B)  cobalt(III) phosphate, Co3(PO4)2 
C)  cobalt(II) phosphate, CoPO4 
D)  cobalt(III) phosphate, CoPO4 
E)  ammonium sulfate, (NH4)2SO4 
A)  cobalt(II) phosphate, Co3(PO4)2 
B)  cobalt(III) phosphate, Co3(PO4)2 
C)  cobalt(II) phosphate, CoPO4 
D)  cobalt(III) phosphate, CoPO4 
E)  ammonium sulfate, (NH4)2SO4

Question 12

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? 
H2SO4(aq) + 2NaOH(aq) F1F1F1S1F1F1F10 2H2O(l) + Na2SO4(aq)

Accepted Answer

A)  0.045 L 
B)  0.28 L 
C)  0.56 L 
D)  0.90 L 
E)  1.1 L 
A)  0.045 L 
B)  0.28 L 
C)  0.56 L 
D)  0.90 L 
E)  1.1 L

Question 13

Which of the following is a weak acid?

Accepted Answer

A)  H2SO4 
B)  HNO3 
C)  HF 
D)  HBr 
E)  HCl 
A)  H2SO4 
B)  HNO3 
C)  HF 
D)  HBr 
E)  HCl

Question 14

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4)3PO4, is dissolved in water?

Accepted Answer

A)  0.40 mol 
B)  1.6 mol 
C)  3.2 mol 
D)  4.8 mol 
E)  6.4 mol 
A)  0.40 mol 
B)  1.6 mol 
C)  3.2 mol 
D)  4.8 mol 
E)  6.4 mol

Question 15

Select the classification for the following reaction. 
CaCl2F1F1F1S1F1F1F10H2O(s)   CaCl2(s) + H2O(g)

Accepted Answer

A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  precipitation 
A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  precipitation

Question 16

An acid

Accepted Answer

A)  produces hydroxide ions when dissolved in water. 
B)  changes the color of phenolphthalein indicator from colorless to pink. 
C)  donates electrons in an electron transfer reaction. 
D)  donates protons in a proton transfer reaction. 
E)  does none of the above. 
A)  produces hydroxide ions when dissolved in water. 
B)  changes the color of phenolphthalein indicator from colorless to pink. 
C)  donates electrons in an electron transfer reaction. 
D)  donates protons in a proton transfer reaction. 
E)  does none of the above.

Question 17

Select the classification for the following reaction. Na2O(s) + H2O(l) F1F1F1S1F1F1F10 2NaOH(aq)

Accepted Answer

A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  precipitation 
A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  precipitation

Question 18

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

Accepted Answer

A)  41.3 g 
B)  31.9 g 
C)  16.1 g 
D)  8.77 g 
E)  2.41 g 
A)  41.3 g 
B)  31.9 g 
C)  16.1 g 
D)  8.77 g 
E)  2.41 g

Question 19

In an acid-base (neutralization) reaction the indicator will change color at the end point.

Accepted Answer

A) True 
 B)False

Question 20

Select the classification for the following reaction. H2(g) + Cl2(g) F1F1F1S1F1F1F10 2HCl(g)

Accepted Answer

A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  none of the above 
A)  combination 
B)  decomposition 
C)  displacement 
D)  acid-base 
E)  none of the above

Exam 4: The Major Classes of Chemical Reactions

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

A 0.00100 mol sample of Ca(OH)2 requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH)2(s) + 2HCl(aq)  CaCl2(aq) + H2O(l)

In the following reaction, what ions, if any, are spectator ions? Pb(NO3)2(aq) + 2NaCl(aq)  PbCl2(s) + 2NaNO3(aq)

When a solution is diluted with water, the ratio of the initial to final volumes of solution is equal to the ratio of final to initial molarities.

You are provided with a 250 mL volumetric flask, deionized water, and solid NaOH. How much NaOH should be weighed out in order to make 250. mL of 0.100 M solution?

Potassium carbonate, K2CO3, sodium iodide, NaI, magnesium chloride, MgCl2, methanol, CH3OH, and ammonium chloride, NH4Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

Which one of the following ionic compounds is insoluble in water?

What, if any, are the spectator ions when aqueous solutions of HBr and RbOH neutralize each other?

A solution of methanol (CH4O) in water has a concentration of 0.200 M. What mass of methanol, in grams, is present in 0.150 liters of this solution?

Calculate the oxidation number of sulfur in sodium metabisulfite, Na2S2O5.

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO4(aq) + (NH4)3PO4(aq) 

Automobile batteries use 3.0 M H2SO4 as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H2SO4(aq) + 2NaOH(aq)  2H2O(l) + Na2SO4(aq)

Which of the following is a weak acid?

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH4)3PO4, is dissolved in water?

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

An acid

Select the classification for the following reaction. Na2O(s) + H2O(l)  2NaOH(aq)

A 0.150 M sodium chloride solution is referred to as a physiological saline solution because it has the same concentration of salts as normal human blood. Calculate the mass of solute needed to prepare 275.0 mL of a physiological saline solution.

In an acid-base (neutralization) reaction the indicator will change color at the end point.

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

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids, Solids, and Phase Changes

The Properties of Mixtures: Solutions and Colloids

Periodic Patterns in the Main Group Elements: Bonding, Structure, and Reactivity

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, Free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Elements in Nature and Industry

The Transition Elements and Their Coordination Compounds

Nuclear Reactions and Their Applications

Filters

A 0.00100 mol sample of Ca(OH)₂ requires 25.00 mL of aqueous HCl for neutralization according to the reaction below. What is the concentration of the HCl? Equation: Ca(OH)₂(s) + 2HCl(aq)  CaCl₂(aq) + H₂O(l)

In the following reaction, what ions, if any, are spectator ions? Pb(NO₃)₂(aq) + 2NaCl(aq)  PbCl₂(s) + 2NaNO₃(aq)

Potassium carbonate, K₂CO₃, sodium iodide, NaI, magnesium chloride, MgCl₂, methanol, CH₃OH, and ammonium chloride, NH₄Cl, are soluble in water. Which produces the largest number of dissolved particles per mole of dissolved solute?

A solution of methanol (CH₄O) in water has a concentration of 0.200 M. What mass of methanol, in grams, is present in 0.150 liters of this solution?

Calculate the oxidation number of sulfur in sodium metabisulfite, Na₂S₂O₅.

Select the correct name and chemical formula for the precipitate that forms when the following reactants are mixed. CoSO₄(aq) + (NH₄)₃PO₄(aq) 

Automobile batteries use 3.0 M H₂SO₄as an electrolyte. How much 1.20 M NaOH will be needed to neutralize 225 mL of battery acid? H₂SO₄(aq) + 2NaOH(aq)  2H₂O(l) + Na₂SO₄(aq)

How many moles of ions are released when 1.6 mol of ammonium phosphate, (NH₄)₃PO₄, is dissolved in water?

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

Select the classification for the following reaction. Na₂O(s) + H₂O(l)  2NaOH(aq)

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