Question 1

 

  1. A fruit processing company has a permit to discharge their process wastewater to irrigate an adjacent farmland. Their permit limits the pH of the discharge to 7.0. If the wastewater is 1000 times more acidic than the limit, what is the current pH of the water?

 

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5.0

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3.0

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4.0

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2.0

 

5 points  

 

Question 2

 

  1. An old oil refinery is clearing their chemical inventory in preparation of shutting down operations (they are closing) next winter. Of the many chemicals that they still have, two drums contain sulfuric acid identified as 4H2SO4.3SO3. For the shipping description, the product should be described as:

 

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sulfuric acid, spent.

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sulfuric acid, fuming (contains less than 30% sulfur trioxide).

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sulfuric acid, fuming (contains 30% or more sulfur trioxide).

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sulfuric acid, fuming (contains unknown % of sulfur trioxide).

 

5 points  

 

Question 3

 

  1. Di-lithium is composed of two lithium atoms. Which of the following statements regarding di-lithium or lithium is FALSE?

 

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They oxidize very slowly in air.

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They remain in the solid state even after getting fragmented.

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Their temperature exceeds the boiling point of water during their reaction to water.

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The hydrogen dissipates into the surrounding environment when reacting to water.

 

5 points  

 

Question 4

 

  1. Triethylaluminum (TEA) is an alkyl aluminum compound that has been used as the active component in flamethrowers. Which of the following statements is INCORRECT regarding TEA?

 

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TEA is a corrosive material.

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TEA is a pyrophoric material.

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Aluminum hydroxide is produced from the combustion of TEA.

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TEA has a flashpoint of -53 deg C.

 

5 points  

 

Question 5

 

  1. The primary acids in acid rain are sulfuric and nitric acids. When it rains, a chemical reaction between the sulfuric acid (in the rain) and limestone structures will form carbon dioxide, water, and a salt of the metal. This salt is:

 

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CaCl2.

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CaCO3.

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Ca(NO3)2.

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CaSO4.

 

5 points  

 

Question 6

 

  1. __________ is a form of impure hydrochloric acid that can be used at swimming pools.

 

 

 

 

 

5 points  

 

Question 7

 

  1. __________ is a colorless liquid that is mainly used as a chlorinating and dehydrating agent. When it reacts with water, a gaseous hydrochloric acid and aqueous sulfuric acid are produced.

 

 

 

 

 

5 points  

 

Question 8

 

  1. The manager of a medium-sized office hired a fire-prevention specialist to give the annual fire training for their employees. In a pre-test of the audience, the specialist said that lithium, sodium, and potassium fires cannot be extinguished effectively by a carbon dioxide fire extinguisher. The reaction of these metals with carbon dioxide will produce __________ and __________.

 

 

 

 

 

5 points  

 

Question 9

 

  1. Aluminum phosphide can be used as a fumigant for almond and pistachio nuts. When aluminum phosphide is shipped, the description will be: __________.

 

 

 

 

 

 

 

 

 
 

 

5 points  

 

Question 10

 

  1. A paramedic responded to an apartment emergency call where a young boy inadvertently swallowed a corrosive (low pH) material. As an initial action, the paramedic could neutralize the kid’s stomach with Philips’ Milk of Magnesia, a form of magnesium 5 points  

 

Question 11

 

  1. The element titanium occurs on earth as titanium (IV) oxide and is found mostly in the mineral called rutile. Rutile is abundant in beach sands in Australia and South Africa. For titanium to be useful, rutile has to be processed to obtain the basic metal form of titanium. Although the process is costly, titanium is gaining popularity as a material for various equipment due to its strength and light weight. One such application is in sports equipment.
    1. Explain the chemical process of manufacturing the metal form of titanium.
    2. Explain why titanium is a good choice of material for golf clubs. When not in use, discuss at least one precaution to observe when storing clubs?
    3. During the fabrication of golf clubs, finely divided titanium is generated, which poses a dangerous risk of fire and explosion. Explain the chemical process involved.

 

Your total response must be at least 200 words in length. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced. Paraphrased and/or quoted material must have accompanying citations in APA format.

 

 

 

 

 

25 points  

 

Question 12

 

  1. A garage that specializes in foreign cars had a small magnesium fire when a car part was ignited. The mechanic knew from his training that he should not use water but could use a dry powder like a sodium chloride based fire extinguishing powder (MET-L-X) or a graphite based (LITH-X). He knows that the CO2 extinguishing powder is not a good choice.
    1. Explain the reasons why the mechanic thinks using CO2 is not a good idea.
    2. If MET-L-X or LITH-X is used, a residue could be left on the metal and if cleaned with water, the fire may be rekindled. Explain the chemical process involved in this phenomenon for both types of fire extinguishing powder.

 

Your total response must be at least 200 words in length. You are required to use at least your textbook as source material for your response. All sources used, including the textbook, must be referenced. Paraphrased and/or quoted material must have accompanying citations in APA format.

 

 

 

 

 

25 points  

 

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