Ep 6 summative review

summative review ep 6

Matching


Match each item with the correct statement below.
a. anode d. half-cell
b. battery e. cathode
c. fuel cell


____ 1. the electrode at which oxidation occurs

____ 2. one part of a voltaic cell in which either oxidation or reduction occurs

____ 3. the electrode at which reduction occurs

____ 4. a group of cells that are connected together

____ 5. a voltaic cell in which a fuel substance undergoes oxidation and from which electrical energy is obtained continuously

Match each item with the correct statement below.
a. electrode d. voltaic cell
b. electrolysis e. dry cell
c. salt bridge


____ 6. a tube containing a conducting solution

____ 7. a conductor in a circuit that carries electrons to or from a substance other than a metal

____ 8. an electrochemical cell that is used to convert chemical energy to electrical energy

____ 9. a voltaic cell in which the electrolyte is a paste

____ 10. a process in which electrical energy is used to bring about a chemical change

Match each item with the correct statement below.
a. actual yield e. limiting reagent
b. percent yield f. mass
c. theoretical yield g. number of molecules
d. excess reagent h. volume


____ 11. This quantity can always be used in the same way as moles when interpreting balanced chemical equations.

____ 12. This is conserved only in reactions where the temperature is constant and the number of moles of gaseous reactants is the same as that of gaseous products.

____ 13. This is conserved in every ordinary chemical reaction.

____ 14. the reactant that determines the amount of product that can be formed in a reaction

____ 15. the maximum amount of product that could be formed from given amounts of reactants

____ 16. the reactant that is not completely used up in a reaction

____ 17. the amount of product formed when a reaction is carried out in the laboratory

____ 18. the ratio of the actual yield to the theoretical yield

Match each item with the correct statement below.
a. product d. balanced equation
b. reactant e. skeleton equation
c. chemical equation


____ 19. a chemical equation that does not indicate relative amounts of reactants and products

____ 20. a new substance formed in a chemical reaction

____ 21. a starting substance in a chemical reaction

____ 22. a concise representation of a chemical reaction

____ 23. an equation in which each side has the same number of atoms of each element

Match each item with the correct statement below.
a. activity series of metals c. combustion reaction
b. single-replacement reaction d. decomposition reaction


____ 24. a reaction in which a single compound is broken down into simpler substances

____ 25. a reaction in which oxygen reacts with another substance, often producing heat or light

____ 26. a reaction in which the atoms of one element replace the atoms of a second element in a compound

____ 27. a list of metals in order of decreasing reactivity

Match each item with the correct statement below.
a. molar volume
b. molar mass
c. atomic mass


____ 28. the number of grams of an element that is numerically equal to the atomic mass of the element in amu

____ 29. the mass of a mole of any element or compound

____ 30. the volume occupied by a mole of any gas at STP

Match each item with the correct statement below.
a. representative particle d. percent composition
b. mole e. standard temperature and pressure
c. Avogadro's number f. empirical formula


____ 31. the number of representative particles of a substance present in 1 mole of that substance

____ 32. an atom, an ion, or a molecule, depending upon the way a substance commonly exists

____ 33. the SI unit used to measure amount of substance

____ 34. 0 C and 1 atm

____ 35. the percent by mass of each element in a compound

____ 36. the smallest whole number ratio of the atoms in a compound

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.

____ 37. In a zinc-copper cell, Zn | Zn (1M) || Cu (1M) | Cu, which electrode is negative?
a. Cu (aq) c. Zn(s)
b. Cu(s) d. Zn (aq)


____ 38. In a dry cell, the electrolyte is a ____.
a. solid c. liquid
b. paste d. gas


____ 39. What is the electrode in the center of the most common dry cell made of?
a. copper c. iron
b. zinc d. graphite


____ 40. What metal is oxidized in the most common dry cell?
a. copper c. iron
b. zinc d. carbon


____ 41. In a fully charged lead storage battery, the cathode grid is packed with ____.
a. spongy lead c. lead(IV) oxide
b. lead sulfate d. sulfuric acid


____ 42. Why can’t a lead storage battery be recharged indefinitely?
a. A direct current must pass through the cells.
b. The electrodes lose lead sulfate.
c. It is difficult to reverse the direction of current flow.
d. The electrolyte is too expensive.


____ 43. What happens in a hydrogen-oxygen fuel cell?
a. Oxygen diffuses through the cathode.
b. Oxygen diffuses through the anode.
c. Hydrogen diffuses through the cathode.
d. Hydrogen and oxygen are mixed before entering the anode.


____ 44. In which direction will the following reaction go if the standard reduction potentials are 0.80 V for Ag/Ag and –0.44 V for Fe/Fe ?
Ag + Fe Ag + Fe
a. forward c. No such reaction can occur.
b. reverse d. Not enough information is given.


____ 45. What is the standard cell potential of a cell made of theoretical metals Ma/Ma and Mb/Mb if the reduction potentials are –0.19 V and –0.85 V, respectively?
a. +0.66 V c. +1.04 V
b. –0.66 V d. –1.04 V


____ 46. What is produced in the electrolysis of brine?
a. chlorine gas, sodium hydroxide, and hydrogen gas
b. chlorine gas and hydrogen gas only
c. chlorine gas and oxygen gas only
d. chlorine gas and sodium only


____ 47. The gas produced at the cathode in the electrolysis of brine is ____.
a. hydroxide c. oxygen
b. chlorines d. hydrogen


summative review ep 6
Answer Section

MATCHING

1. ANS: A DIF: L1 REF: p. 665 OBJ: 21.1.2

2. ANS: D DIF: L1 REF: p. 665 OBJ: 21.1.2

3. ANS: E DIF: L1 REF: p. 665 OBJ: 21.1.2

4. ANS: B DIF: L1 REF: p. 668 OBJ: 21.1.4

5. ANS: C DIF: L1 REF: p. 669 OBJ: 21.1.5

6. ANS: C DIF: L1 REF: p. 665 OBJ: 21.1.2

7. ANS: A DIF: L1 REF: p. 665 OBJ: 21.1.2

8. ANS: D DIF: L1 REF: p. 665 OBJ: 21.1.2

9. ANS: E DIF: L1 REF: p. 667 OBJ: 21.1.3

10. ANS: B DIF: L1 REF: p. 678 OBJ: 21.3.1

11. ANS: G DIF: L1 REF: p. 356 OBJ: 12.1.2

12. ANS: H DIF: L1 REF: p. 357 OBJ: 12.1.2

13. ANS: F DIF: L1 REF: p. 357 OBJ: 12.1.2

14. ANS: E DIF: L1 REF: p. 369 OBJ: 12.3.1

15. ANS: C DIF: L1 REF: p. 369 OBJ: 12.3.1

16. ANS: D DIF: L1 REF: p. 372 OBJ: 12.3.2

17. ANS: A DIF: L1 REF: p. 372 OBJ: 12.3.2

18. ANS: B DIF: L1 REF: p. 372 OBJ: 12.3.2

19. ANS: E DIF: L1 REF: p. 323 OBJ: 11.1.2

20. ANS: A DIF: L1 REF: p. 323 OBJ: 11.1.2

21. ANS: B DIF: L1 REF: p. 323 OBJ: 11.1.2

22. ANS: C DIF: L1 REF: p. 323 OBJ: 11.1.3

23. ANS: D DIF: L1 REF: p. 325 OBJ: 11.1.3

24. ANS: D DIF: L1 REF: p. 332 OBJ: 11.2.1

25. ANS: C DIF: L1 REF: p. 336, p. 337
OBJ: 11.2.1

26. ANS: B DIF: L1 REF: p. 333 OBJ: 11.2.1

27. ANS: A DIF: L1 REF: p. 333 OBJ: 11.2.2

28. ANS: C DIF: L1 REF: p. 294 OBJ: 10.1.3

29. ANS: B DIF: L1 REF: p. 294, p. 295
OBJ: 10.1.3, 10.1.4

30. ANS: A DIF: L1 REF: p. 300 OBJ: 10.2.2

31. ANS: C DIF: L1 REF: p. 290 OBJ: 10.1.2

32. ANS: A DIF: L1 REF: p. 290 OBJ: 10.1.2

33. ANS: B DIF: L1 REF: p. 290 OBJ: 10.2.1

34. ANS: E DIF: L1 REF: p. 300 OBJ: 10.2.2

35. ANS: D DIF: L1 REF: p. 305 OBJ: 10.3.1

36. ANS: F DIF: L1 REF: p. 309 OBJ: 10.3.2

MULTIPLE CHOICE

37. ANS: C DIF: L1 REF: p. 665 OBJ: 21.1.2

38. ANS: B DIF: L1 REF: p. 667 OBJ: 21.1.3

39. ANS: D DIF: L1 REF: p. 667 OBJ: 21.1.3

40. ANS: B DIF: L1 REF: p. 667 OBJ: 21.1.3

41. ANS: C DIF: L1 REF: p. 668 OBJ: 21.1.4

42. ANS: B DIF: L2 REF: p. 668 OBJ: 21.1.4

43. ANS: A DIF: L1 REF: p. 669 OBJ: 21.1.5

44. ANS: A DIF: L2 REF: p. 675 OBJ: 21.2.3

45. ANS: A DIF: L1 REF: p. 675, p. 676
OBJ: 21.2.4

46. ANS: A DIF: L2 REF: p. 681 OBJ: 21.3.3

47. ANS: D DIF: L2 REF: p. 681 OBJ: 21.3.3