Chem 1360 Exam 4 Review
Aluminum hydroxide is a popular antacid. The formula of aluminum hydroxide is
Al(OH)2-
Which of the following are characteristics of bases?
All are characteristics of bases. (taste bitter, reacts with acids to form salts, produce hydroxide ions when added to water)
What is reduced in the following reaction? 2 Bi3+ + 3 Mg -> 2 Bi + 3 Mg2+
Bi3+
Which of the following ingredients would not be an active ingredient in an antacid?
NaBr
This compound is a powerful oxidizing agent and a harmful pollutant; yet a layer of it in the upper stratosphere serves as a shield from harmful ultraviolet radiation from the sun.
O2 (ozone)
Acid rain is caused by acidic pollutants in the air. Which of the following pollutants does NOT contribute to acid rain?
ammonia, NH3
Which of the following is NOT a common oxidizing agent?
an antioxidant
Benzoyl peroxide, used in the treatment of acne, is
an oxidizing agent
In the reaction N2 + 32 -> 2 NH3, nitrogen is
an oxidizing agent
Swimming pools are "chlorinated" in order to
disinfect the water
In the following reaction, hydrogen is the __.
reducing agent
Sodium bisulfite converts bromine (Br2) to bromide (Br-). Sodium bisulfate is a(n)
reducing agent
Antioxidants are
reducing agents found in foods
All of the following are bases except
HNO3
A major advantage of lead storage batteries is that they are
rechargable
Lithium hydroxide is classified as a strong base in water. This means that it produces
100% of the maximum number of possible hydroxide ions
The pH = -log[H+] for a solution. The pOH = -log[OH-] for a solutoin. The pH and pOH are related, and their sum is equal to 14 (pH + pOH = 14). If the concentration of a dilute solution of potassium hydroxide is 0.001 M, what is the pH of that solution?
11
In the balanced chemical reaction for the neutralization of sodium hyrdroxide with sulfuric acid, H2SO4, the coefficient of water is
2
According to Arrhenius, an acid and a base will react to give
A salt plus water
Which of the following is the correct balanced equation for the neutralization of barium hydroxide with hyrdrochloric acid?
Ba(OH)2 + 2 HCl -> BaCl2 + 2 H20
Which of the following is the correct balanced equation for the neutralization of barium hydroxide with hydrochloric acid?
Ba(OH)2 + 2 HCl -> BaCl2 + 2 H2O
The compound CH3NH2 reacts with water to form CH3NH3+ and OH-. In this reaction, CH3NH2 is acting as a(n).
Base
In which of the following equations is the reactant undergoing oxidation? (Note: these reactions are not complete chemical equations)
C -> CO2
In which of the following is he reactant undergoing reductions?
C2H4O -> C2H6O
Lime is used in farming to reduce the acidity of the soil. The chemical name for lime is calcium oxide. When water in the soil reacts with lime, what base is formed?
Ca(OH)2
Consider the following reaction: 2 Fe + 3 Mg2+ -> 2 Fe3+ + 3 Mg. The half-reaction for the oxidation in this reaction is
Fe ->Fe3+ + 3e-
A sample of rainwater has a pH of 3.5. What ion is sure to be present in relatively large concentration in this rain sample?
H3O+
When added to water, which of the following would produce a base?
Li2O
Which of the following statements is true for electrochemical cells?
Oxidation occurs at the anode
Which of the following is a definition of reduction?
Reduction is the gain of hydrogen
When added to water, which of the following would produce an acid?
SO2
Foods that are acidic can be identified by their ___ taste.
Sour
Ammonia is classified as a weak base in water. This means that it produces
a relatively small fraction of the maximum number of possible hydroxide ions
The same number of moles of acetic acid and hydrogen chloride are placed in beakers containing water. After this addition, the beaker with the HCl has more hydronium ions than the beaker with added acid. HCl is classified as
a stronger acid than acetic acid
When the pH of the blood is too high, the condition is called
alkalosis
The removal of silver tarnish from silverware using aluminum foil and a solution of electrolyte is an example of
all of the above (oxidation of aluminum metal, reduction of silver ions, an electrochemical cell)
Aluminum is more reactive than iron is, but iron corrodes more quickly. This occurs because
aluminum develops a coating of aluminum oxide, which protects it from further reaction
All of the following are commonly involved in explosions except
aluminum metal
Many medicines have a bitter taste which manufacturers attempt to disguise. Many medicines are probable
bases
Photochromic lenses contain
both AgCl and CuCl embedded in the glass
All of the following are reducing agents except
chlorine
Which of the following is NOT a common reducing agent?
hydrogen peroxide
Silver is plated on copper by immersing a piece of copper into a solution containing silver ions. In the planting reaction, copper
is oxidized an is the reducing agent
The corrosion of metals, such as the rusting of iron, is an example of
oxidation
Most chemical explosions are __ reactions
oxidation-reduction
Given their mode of action, antiseptics are generally best classified as
oxidizing agents
Most household bleaches act as
oxidizing agents
Human cells obtain energy by
oxidizing carbohydrates
The only natural process that produces oxygen is
photosynthesis
All of the following are true for green oxidation catalysts except
they are often carcinogenic
In the photosynthesis reaction: 6 CO2 + 6H2O -> C6H12O6 + 6 O2, the substance that serves as the reducing agent is
water
Citric acid is produced by oranges. When citric acid dissolves in water, it produces a relatively small number of hydronium ions. Citric acid is best described as a
weak acid
