Question 1
What oxidizer is used to prepare the chemical referred to as piranha in the computer-chip industry?
Potassium superoxide
Hydrogen peroxide
Peroxydisulfuric acid
Sodium persulfate
4 points
Question 2
When bleach and ammonia are mixed, one of the chemical reactions is
2NaOCl + 2NH3 ? 2NaONH3 + Cl2. Which reactant undergoes reduction?
NaOCl
NH3
Cl2
NaO
4 points
Question 3
Fireworks are items intentionally designed for the purpose of producing visual and audible effect by means of combustion, explosion, deflagration, and detonation reactions. Select which of the following statements is FALSE regarding fireworks.
When shipping fireworks, the Department of Transportation (DOT) requires that the applicable EX-number and Department of Defense (DOD) national stock number be included in the description.
A component of fireworks is a mixture of oxidizing and reducing agent.
Fireworks could not be used as weapons of mass destruction.
The most commonly encountered oxidizers in fireworks include sodium chlorite, sodium chlorate, and sodium perchlorate.
4 points
Question 4
An oxidation number describes the combining capability of one ion to another ion or of one atom to another atom. Which of the following statements regarding oxidation numbers is FALSE?
H2S contains sulfur which has an oxidation number of -2.
Each oxygen in KMnO4 has an oxidation number of -2, and the oxidation number of K is +1; therefore, the oxidation number on Mn in this compound is +7.
The oxidation number of a monoatomic ion is the same as its ionic charge, such that Na ion has an oxidation number of +1.
The oxidation number of each atom in an element is zero, such that the oxidation number of Cl2 is -2.
4 points
Question 5
Which of the following statements is FALSE regarding hydrogen peroxide?
Hydrogen peroxide is the primary constituent of OxiClean.
Hydrogen peroxide is corrosive.
Hydrogen peroxide can be used to destroy E.coli or salmonella.
Hydrogen peroxide employee exposure limit is 1 ppm.
4 points
Question 6
The oxidation number of chlorine in KClO4 is __________.
4 points
Question 7
The oxidation number of phosphorus in the P4O6 chemical formula is __________.
4 points
Question 8
The tarnishing of silver is an example of a __________ reaction.
4 points
Question 9
One or more of the ions that do not participate in an oxidation-reduction reaction are called __________ ions.
4 points
Question 10
The components of ordinary gunpowder are elemental sulfur, charcoal, and potassium nitrate. When gunpowder explodes, these components react as follows:
3S8(s) + 16C(s) + 32KNO3(s)
Sulfur Carbon Potassium nitrate
16K2O(s) + 16CO2(g) + 16N2(g) + 24SO2(g)
Potassium oxide Carbon dioxide Nitrogen Sulfur dioxide
For this redox reaction, the reducing agents are __________ and __________.
4 points
Question 11
Metallic peroxides and metallic hypochlorites, when used as bleaching agents, are distinguished by calling the latter chlorine bleach.
For hypochlorite bleaching agents, why do manufacturers sometimes identify their available chlorine on product labels? Explain what available chlorine means?
Discuss some hazards associated with metallic hypochlorites.
Discuss how water can effectively extinguish oxidizer supported fires.
Your total response must be at least 200 words in length. All sources used, including the textbook, must be referenced. Paraphrased and/or quoted materials must have accompanying in-text and reference citations in APA format.
30 points
Question 12
A worker at DMG Energy, LLC experienced chest pain and was transported to the cardiac unit at a local hospital for treatment. During the doctor’s evaluation, the worker disclosed that he was on an ultra-low sodium diet. Explain why nutritionists often advise individuals on low-sodium diets to avoid cured fish and meat products. Contrast some properties between metallic nitrites and metallic nitrates.
Your response must be at least 200 words in length. All sources used, including the textbook, must be referenced. Paraphrased and/or quoted materials must have accompanying in-text and reference citations in APA format.
30 points
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