Question 1

What volume of 3.0 M NaOH contains 0.15 mole of NaOH?

Accepted Answer

A)  500 mL 
B)  50 mL 
C)  5.0 mL 
D)  0.50 mL 
E)  0.050 mL 
A)  500 mL 
B)  50 mL 
C)  5.0 mL 
D)  0.50 mL 
E)  0.050 mL

Question 2

Write the balanced molecular equation and the net ionic equation for the reaction of solid magnesium hydroxide with a solution of sulfuric acid.

Accepted Answer

Mg(OH)₂(s) + H₂SO₄(aq) F1F1F1S1F

Question 3

If one regular antacid tablet contains 500 mg of solid CaCO3 (100 g/mol), how many mL of 1.0 M stomach acid (HCl) could it neutralize?

Accepted Answer

A)  5 mL 
B)  10 mL 
C)  50 mL 
D)  100 mL 
E)  15 mL 
A)  5 mL 
B)  10 mL 
C)  50 mL 
D)  100 mL 
E)  15 mL

Question 4

Arsenic, which is toxic, can be removed from drinking water by precipitation as the sulfide. Write the net ionic equation for the precipitation of As3+ using sodium sulfide, Na2S.

Accepted Answer

2As³⁺(aq) +

Question 5

Controlling the concentration of ammonia is one of the biggest problems in maintaining a healthy fish aquarium. Ammonia, which is highly toxic to fish because it interferes with their uptake of oxygen, is formed from wastes excreted by the fish, uneaten food, and decaying plants. Beneficial bacteria oxidize the ammonia to nitrate, which is not highly toxic to fish in low to moderate levels. Complete and balance the following reaction equation describing the oxidation of ammonia to nitrate in basic solution.
NH3(aq) + O2(aq) F1F1F1S1F1F1F10 NO3-

Accepted Answer

NH₃(aq) + 2O₂(aq) + OH

Question 6

Which contains more solute particles: a 0.10 M aqueous solution of methanol (CH3OH) or a 0.10 M aqueous solution of salt (NaCl)?

Accepted Answer

A)  They contain the same number of solute particles. 
B)  The salt solution contains twice as many particles as the methanol solution. 
C)  The methanol solution contains three times as many particles as the salt solution. 
D)  Neither solution contains solute particles. 
E)  The methanol solution contains twice as many particles as the salt solution. 
A)  They contain the same number of solute particles. 
B)  The salt solution contains twice as many particles as the methanol solution. 
C)  The methanol solution contains three times as many particles as the salt solution. 
D)  Neither solution contains solute particles. 
E)  The methanol solution contains twice as many particles as the salt solution.

Question 7

If 1.0 L of 1.0 M HCl spilled and needed to be neutralized, how many grams of the solid sodium carbonate (Na2CO3, 106 g/mol) would be required?

Accepted Answer

A)  53 g 
B)  106 g 
C)  1060 g 
D)  530 g 
E)  212 g 
A)  53 g 
B)  106 g 
C)  1060 g 
D)  530 g 
E)  212 g

Question 8

Two phosphoric acid molecules can combine to make pyrophosphoric acid and another molecule as shown here. The pyrophosphoric acid molecule is a phosphoester and is a structural element in the ADP/ATP metabolic energy system. What molecule is represented by the question mark in the structural reaction equation below?

Accepted Answer

A)  O2 
B)  OH- 
C)  H2O 
D)  PO 
E)  H2 
A)  O2 
B)  OH- 
C)  H2O 
D)  PO 
E)  H2

Question 9

Molarity, M, is defined as __________

Accepted Answer

A)  moles of solute dissolved in 1 mol of solvent. 
B)  moles of solute dissolved in 1 kg of solvent. 
C)  moles of solute dissolved in 1 L of solvent. 
D)  moles of solute dissolved in 1 L of solution. 
E)  moles of solute dissolved in the solution. 
A)  moles of solute dissolved in 1 mol of solvent. 
B)  moles of solute dissolved in 1 kg of solvent. 
C)  moles of solute dissolved in 1 L of solvent. 
D)  moles of solute dissolved in 1 L of solution. 
E)  moles of solute dissolved in the solution.

Question 10

Most chloride salts are soluble. Identify an exception to this generalization.

Accepted Answer

A)  AgCl 
B)  CaCl2 
C)  MgCl2 
D)  BaCl2 
E)  NaCl 
A)  AgCl 
B)  CaCl2 
C)  MgCl2 
D)  BaCl2 
E)  NaCl

Question 11

A standard adult dose of a cough suppressant is 25.0 mL. This portion contains 50.0 mg of the active ingredient. A pediatrician suggests that this medication can be given to children over the age of 6, but only if it is diluted so the dose is 5.00 mg in 10.0 mL. How many mL of the adult medicine would you need to use to make 100.0 mL of the child-strength cough suppressant?

Accepted Answer

The answer of A standard adult dose of a cough...

Question 12

According to the label on a bottle of concentrated hydrochloric acid, the contents are 35% HCl by mass and have a density of 1.2 g/mL. What is the molarity of commercial concentrated hydrochloric acid?

Accepted Answer

The answer of According to the label on a bottle...

Question 13

Which of the following compounds is most soluble in water?

Accepted Answer

A)  AgCl 
B)  CaCO3 
C)  Al(OH)3 
D)  K2SO4 
E)  MgS 
A)  AgCl 
B)  CaCO3 
C)  Al(OH)3 
D)  K2SO4 
E)  MgS

Question 14

Milk of Magnesia is a liquid antacid. The active ingredient is magnesium hydroxide. What volume of 0.15 M stomach acid (HCl) could be neutralized by a dose of 10.0 mL containing 820 mg of the active ingredient?

Accepted Answer

The answer of Milk of Magnesia is a liquid antacid....

Question 15

If 100 mL of 3.0 M solution were diluted to 250 mL, what would the concentration be?

Accepted Answer

A)  0.012 M 
B)  0.12 M 
C)  1.2 M 
D)  12 M 
E)  120 M 
A)  0.012 M 
B)  0.12 M 
C)  1.2 M 
D)  12 M 
E)  120 M

Question 16

Sodium fluoride is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca10(PO4)6(OH)2, into more stable fluorapatite, Ca10(PO4)6F2. Express a flouride concentration of 5 mg/L molarity.

Accepted Answer

3 F1F1F1S1

Question 17

What is the difference between a strong acid and a weak acid?

Accepted Answer

A strong acid ionize

Question 18

Methane (CH4) is a suitable fuel for burning because it is readily oxidized by oxygen gas, forming carbon dioxide and water. Hydrogen is also a good fuel for burning with oxygen gas, forming water as a product. What change in oxidation number always accompanies oxidation?

Accepted Answer

A)  a decrease 
B)  an increase 
C)  no change 
D)  The change varies with the reaction. 
E)  Oxidation number increases by 1 unit. 
A)  a decrease 
B)  an increase 
C)  no change 
D)  The change varies with the reaction. 
E)  Oxidation number increases by 1 unit.

What volume of 3.0 M NaOH contains 0.15 mole of NaOH?

Write the balanced molecular equation and the net ionic equation for the reaction of solid magnesium hydroxide with a solution of sulfuric acid.

If one regular antacid tablet contains 500 mg of solid CaCO₃ (100 g/mol), how many mL of 1.0 M stomach acid (HCl) could it neutralize?

Arsenic, which is toxic, can be removed from drinking water by precipitation as the sulfide. Write the net ionic equation for the precipitation of As³⁺ using sodium sulfide, Na₂S.

Which contains more solute particles: a 0.10 M aqueous solution of methanol (CH₃OH) or a 0.10 M aqueous solution of salt (NaCl)?

If 1.0 L of 1.0 M HCl spilled and needed to be neutralized, how many grams of the solid sodium carbonate (Na₂CO₃, 106 g/mol) would be required?

Molarity, M, is defined as __________

Most chloride salts are soluble. Identify an exception to this generalization.

According to the label on a bottle of concentrated hydrochloric acid, the contents are 35% HCl by mass and have a density of 1.2 g/mL. What is the molarity of commercial concentrated hydrochloric acid?

Which of the following compounds is most soluble in water?

Milk of Magnesia is a liquid antacid. The active ingredient is magnesium hydroxide. What volume of 0.15 M stomach acid (HCl) could be neutralized by a dose of 10.0 mL containing 820 mg of the active ingredient?

If 100 mL of 3.0 M solution were diluted to 250 mL, what would the concentration be?

Sodium fluoride is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca₁₀(PO₄)₆(OH)₂, into more stable fluorapatite, Ca₁₀(PO₄)₆F₂. Express a flouride concentration of 5 mg/L molarity.

What is the difference between a strong acid and a weak acid?

Methane (CH₄) is a suitable fuel for burning because it is readily oxidized by oxygen gas, forming carbon dioxide and water. Hydrogen is also a good fuel for burning with oxygen gas, forming water as a product. What change in oxidation number always accompanies oxidation?

Matter, Energy, and the Origins of the Universe

Atoms, Ions, and Compounds

Chemical Reactions and Earths Composition

Thermochemistry

Properties of Gases: the Air We Breathe

Electrons in Atoms and Periodic Properties

Chemical Bonding and Climate Change

Molecular Geometry and Bonding Theories

Forces Between Ions and Molecules

Solutions and Their Colligative Properties

The Chemistry of Solids

Organic Chemistry: Fuels, Pharmaceuticals, and Materials

Thermodynamics: Spontaneous Processes, Entropy, and Free Energy

Chemical Kinetics

Chemical Equilibrium

Equilibrium in the Aqueous Phase

The Colorful Chemistry of Metals

Electrochemistry and the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry

Life and the Periodic Table

Filters

Exam 4: Solution Chemistry and the Hydrosphere

What volume of 3.0 M NaOH contains 0.15 mole of NaOH?

Write the balanced molecular equation and the net ionic equation for the reaction of solid magnesium hydroxide with a solution of sulfuric acid.

If one regular antacid tablet contains 500 mg of solid CaCO3 (100 g/mol), how many mL of 1.0 M stomach acid (HCl) could it neutralize?

Arsenic, which is toxic, can be removed from drinking water by precipitation as the sulfide. Write the net ionic equation for the precipitation of As3+ using sodium sulfide, Na2S.

Which contains more solute particles: a 0.10 M aqueous solution of methanol (CH3OH) or a 0.10 M aqueous solution of salt (NaCl)?

If 1.0 L of 1.0 M HCl spilled and needed to be neutralized, how many grams of the solid sodium carbonate (Na2CO3, 106 g/mol) would be required?

Molarity, M, is defined as __________

Most chloride salts are soluble. Identify an exception to this generalization.

According to the label on a bottle of concentrated hydrochloric acid, the contents are 35% HCl by mass and have a density of 1.2 g/mL. What is the molarity of commercial concentrated hydrochloric acid?

Which of the following compounds is most soluble in water?

Milk of Magnesia is a liquid antacid. The active ingredient is magnesium hydroxide. What volume of 0.15 M stomach acid (HCl) could be neutralized by a dose of 10.0 mL containing 820 mg of the active ingredient?

If 100 mL of 3.0 M solution were diluted to 250 mL, what would the concentration be?

Sodium fluoride is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca10(PO4)6(OH)2, into more stable fluorapatite, Ca10(PO4)6F2. Express a flouride concentration of 5 mg/L molarity.

What is the difference between a strong acid and a weak acid?

Methane (CH4) is a suitable fuel for burning because it is readily oxidized by oxygen gas, forming carbon dioxide and water. Hydrogen is also a good fuel for burning with oxygen gas, forming water as a product. What change in oxidation number always accompanies oxidation?

Matter, Energy, and the Origins of the Universe

Atoms, Ions, and Compounds

Chemical Reactions and Earths Composition

Thermochemistry

Properties of Gases: the Air We Breathe

Electrons in Atoms and Periodic Properties

Chemical Bonding and Climate Change

Molecular Geometry and Bonding Theories

Forces Between Ions and Molecules

Solutions and Their Colligative Properties

The Chemistry of Solids

Organic Chemistry: Fuels, Pharmaceuticals, and Materials

Thermodynamics: Spontaneous Processes, Entropy, and Free Energy

Chemical Kinetics

Chemical Equilibrium

Equilibrium in the Aqueous Phase

The Colorful Chemistry of Metals

Electrochemistry and the Quest for Clean Energy

Biochemistry: the Compounds of Life

Nuclear Chemistry

Life and the Periodic Table

Filters

If one regular antacid tablet contains 500 mg of solid CaCO₃ (100 g/mol), how many mL of 1.0 M stomach acid (HCl) could it neutralize?

Arsenic, which is toxic, can be removed from drinking water by precipitation as the sulfide. Write the net ionic equation for the precipitation of As³⁺ using sodium sulfide, Na₂S.

Which contains more solute particles: a 0.10 M aqueous solution of methanol (CH₃OH) or a 0.10 M aqueous solution of salt (NaCl)?

If 1.0 L of 1.0 M HCl spilled and needed to be neutralized, how many grams of the solid sodium carbonate (Na₂CO₃, 106 g/mol) would be required?

Sodium fluoride is added to drinking water in some municipalities to protect teeth against cavities. The idea is to convert hydroxyapatite, Ca₁₀(PO₄)₆(OH)₂, into more stable fluorapatite, Ca₁₀(PO₄)₆F₂. Express a flouride concentration of 5 mg/L molarity.

Methane (CH₄) is a suitable fuel for burning because it is readily oxidized by oxygen gas, forming carbon dioxide and water. Hydrogen is also a good fuel for burning with oxygen gas, forming water as a product. What change in oxidation number always accompanies oxidation?