Make up exams for second semester

All retests must be turned in by January 20th, hand written in your notebooks. copy the question also.

ep 6 test
Essay

1. Explain what occurs in an electrochemical cell.

2. What are the components of a voltaic cell?

3. Describe a common dry cell.

4. Describe the lead storage battery.

5. Describe how a fuel cell works.

6. What is the standard cell potential?

7. Explain what occurs in an electrolytic cell.

8. Give the sign of the electrodes and the reaction that occurs at each for both voltaic and electrolytic cells.

EP 5 test
make up test ep 5

Essay

1. When steam is used to drive a turbine, the kinetic energy of the moving turbine will be less than the energy used initially to heat the water to steam. Explain why this is not a violation of the law of conservation of energy.

2. Explain the difference between temperature and heat. Also, state what determines the direction of heat transfer.

3. Explain the distinction between heat capacity and specific heat. Provide an example to illustrate this distinction.

4. Describe the parts of a calorimeter and the function of each part.

5. Using what you know about phase changes, why does steam at 100 C produce a more harmful burn than boiling water?

6. Explain the effects of reactant concentration and particle size on the rate of a reaction.


ep 4 test
make up test ep 4

Essay

1. In general, how are word equations written to describe chemical reactions?

2. Describe how to write the skeleton equation for the following reaction:

iron + oxygen iron(III) oxide

3. Consider the description: copper(II) oxide reacts with sulfuric acid to produce copper(II) sulfate and water. List the steps required to write its balanced chemical equation. State how to determine which of the five general types of reaction this represents.

4. What determines whether one metal will replace another metal from a compound in a single-replacement reaction?

5. Predict the precipitate that forms when aqueous solutions of silver nitrate and potassium chloride react to form products in a double-replacement reaction. Include a discussion of how to write the complete chemical equation describing this reaction.

6. When a mixture of sulfur and metallic silver is heated, silver sulfide is produced. What mass of silver sulfide is produced from a mixture of 3.0 g Ag and 3.0 g S ?
16Ag(s) + S (s) 8Ag S(s)

7. What is the limiting reagent when 150.0 g of nitrogen react with 32.1 g of hydrogen?
N (g) + 3H (g) 2NH (g)

8. A 500-g sample of Al (SO ) is reacted with 450 g of Ca(OH) . A total of 596 g of CaSO is produced. What is the limiting reagent in this reaction, and how many moles of excess reagent are unreacted?
Al (SO ) (aq) + 3Ca(OH) (aq) 2Al(OH) (s) + 3CaSO (s)