Science 20 Unit A Unit Test
NAME:_____________________
DATE: _____________________
MARK:
/45
%
1. When Calcium becomes an ion it
a. Looses 2 electrons
b. Gains 2 electrons
c. Looses 2 protons
d. Gains 2 protons
GLO 1: explain how dissolving substances in water is often a prerequisite for chemical reactions and chemical
changes;
2. Disassociation is
a. The separation of molecular compounds into individual ions in a solution
b. The separation of ionic compounds into individual ions in a solution
c. The separation of molecular compounds into separate molecules in solution
d. The separation of ionic compounds into separate molecules in solution
3. Disassociation is required for voltaic cells because
a. There must be a supply of ions
b. Metals cannot dissociate
c. Nonmetals cannot dissociate
d. There must be a supply of metals
GLO 2: differentiate, on the basis of properties, between electrolytes and nonelectrolytes
Use the following information to answer the next question
4. Which of the solutions above is a non-electrolyte?
a. Solution 1
b. Solution 2
c. Solution 3
d. Solution 4
5. Na2SO2 is a/an ______i______ because it is a/an ________ii_______ solution
The statement above are completed by the information in row
Row
A
B
C
D
i
Electrolyte
Electrolyte
Nonelectrolyte
Nonelectrolyte
ii
Ionic
Molecular
Ionic
Molecular
6. Which of the following rows correctly completes the chart?
Row
A
B
C
D
Electrolyte
H2O
C6H12O6
NaCl
NaOH
Nonelectrolyte
NO2
H2O
KOH
CO2
GLO 3: compare and explain how concentrations of solutions are expressed in moles per litre, percent by volume
and parts per million
Use the following information to answer the next question
Numerical Response
1.
Match each of the blanks numbered above with the data value to which it
corresponds, as given below.
Mass of ethanol (3.95 g)
_____ (Record in the first column)
Volume of ethanol (5.00 mL)
_____ (Record in the second column)
Mass of solution (2 495 g)
_____ (Record in the third column)
Volume of solution (2 495 mL) _____ (Record in the fourth column)
(Record your answer in the numerical-response section on the answer sheet.)
Use the following information for the next question
7. According to the information above the solvent is
a. Flour
b. Black pepper
c. Sour cream
d. Milk
GLO 4: determine the concentration of solutions in moles per litre, percent by volume and parts per million
Numerical Response
2.
A mosquito repellent contains 65 ml of DEET in every 250 ml bottle. What is the
percent by volume concentration of DEET in this repellent?
____ ____ ____ ____
(Record your answer in the numerical-response section on the answer sheet.)
8. A student takes 9.50g of potassium permanganate, KMnO4 (s), and dissolves it into 80.0 ml
of water. How many moles of potassium permanganate are in the solution?
a. 0.060 mol
b. 0.119 mol
c. 0.506 mol
d. 8.421 mol
9. You dissolve 37.0g of sodium sulphate, NaCl (s) into 350 ml of water. What is the
concentration of the solution?
a. 0.11 mol/L
b. 1.81 mol/L
c. 6.17 mol/L
d. 105.7 mol/L
10. A hair product requires you to make a solution of hydrogen peroxide and water. If you
need 400 ml of hydrogen peroxide for every 350 ml of water what is the % by volume
concentration?
a. 13%
b. 53%
c. 88%
d. 114%
11. A 250g bottle of water contains 3.5 x 10-3g of mercury. What is the concentration of
mercury in parts per million?
a. 0.014 ppm
b. 14 ppm
c. 52 ppm
d. 71 ppm
12. You put 6.5 mol of KOH into 5.4L of water. What is the concentration of this solution?
a. 0.01 mol/L
b. 0.02 mol/L
c. 0.83 mol/L
d. 1.20 mol/L
GLO 5: determine the concentration of diluted solutions and the quantities of a concentrated solution and of
water to use when diluting.
13. A chemical procedure requires 100 mL of 1.25 mol/L sulfuric acid. If a stock solution of
sulfuric acid with a molar concentration of 6.00 mol/L is available, then the volume of the
stock solution that must be diluted is
a. 7.50 mL
b. 20.8 mL
c. 48.0 mL
d. 1.25 mL
14. A large beaker contains 655 ml of a standard solution of sulphuric acid with a
concentration of 10.0 mol/L. this beaker is placed in the fume hood where evaporation can
occur. Determine the amount of water that would have to evaporate in order for the
solution to have a concentration of 11.5 mol/L
a. 98 ml
b. 85 ml
c. 570 ml
d. 753 ml
GLO 6: balance provided single-replacement reaction equations, building on knowledge from Science 10, Unit A
15. The coefficients to balance the following reaction are respectfully
__ Ag2S + __ Al  __Ag + __Al2S3
a. 3,2,6,1
b. 3,2,6,2
c. 6,4,6,2
d. 9,4,6,3
16. The coefficients to balance the following reaction are respectfully
__ AlBr3 + __ Cl2  __AlCl3 + __Br2
a. 2,2,1,2
b. 3,3,1,3
c. 2,3,2,3
d. 4,4,3,4
GLO 7: determine the reactivity of metals by comparing their reaction in various aqueous solutions
17. An acid containing Hydrogen ions is poured over 3 metal strips. Which of the following
would produce the largest reaction?
a. Lead
b. Copper
c. Zinc
d. They would all produce the same type of reaction
18. You have an aluminum boat which you launch into an unknown lake. Once it is in the water
you notice a chemical reaction occurring on the surface where your boat touches the
water. You see a nearby sign indicating that the lake contains high concentrations of
sodium, iron, calcium and zinc ions. Based on this information you know your boat is
reacting with the
a. Sodium ions
b. Iron ions
c. Calcium ions
d. Zinc ions
GLO 8: relate single-replacement reactions to oxidation-reduction and apply mole ratios from given equations to
predict moles of metals consumed or produced
19. 2 mol of nickel react in the following reaction.
2 AgNO3 + Ni  Ni(NO3)2+ 2 Ag
How many moles of silver are produced?
a. 1
b. 2
c. 3
d. 4
20. 16 mol of Oxygen gas is consumed in the following reaction
2 C4H10 + 13 O2  8 CO2 + 10 H2O
How many moles of C4H10 is also consumed?
a. 16 mol
b. 8.0 mol
c. 2.5 mol
d. 1.2 mol
21. You create the following voltaic cell
Ag|Ag+||Sn2+|Sn
If 1.6 mol of Sn are consumed by the cell, how many moles of Ag are produced?
a. 0.8 mol
b. 1.6 mol
c. 3.2 mol
d. 4.8 mol
GLO 9: define, operationally, oxidation and reduction and spontaneous and nonspontaneous reactions;
22. A metal atom loses electrons. In effect it is said to be
a. Oxidized
b. Reduced
23. A sodium ion is plated onto a cathode. According to this information Sodium is undergoing
a. Oxidation reaction
b. Reduction reaction
24. A metal rod is placed into a solution containing metal ions. A student touches it and
receives a small electric shock. According to this information the reaction is
a. Spontaneous
b. Nonspontaneous
25. A nickel rod is placed into a solution containing Cu2+. According to this information the
reaction would be
a. Spontaneous
b. Nonspontaneous
Use the following information to answer the next Question
26. As depicted on the activity series, a mercury(II) ion must
i
electrons in order to be
converted to the mercury atom. In addition, their position on the activity series indicates
that a mercury(II) ion is
ii
reactive than a mercury atom
The statements above are completed by the information in row
Row
A
B
C
D
i
Gain
Gain
Lose
Lose
ii
More
Less
More
Less
GLO 10: apply the principles of oxidation-reduction and half-reactions to describe, in general terms, the operation
of voltaic and electrolytic cells; reaction equations;
Use the following information to answer the next question
27. You create the following voltaic cell Zn2+|Zn||Mg|Mg2+ Which letter indicates the
position of Zn?
a. A
b. B
c. C
d. D
Use the following information to answer the next question
28. Assuming that there are copper ions in the beaker with the copper strip and zinc ions in the
beaker with the zinc strip. The copper electrode is the _____i_____ and the electrons flow
_____ii_____
The statements above are completed by the information in row
Row
A
B
C
D
i
Cathode
Anode
Cathode
Anode
ii
Left to right
Left to right
Right to left
Right to left
Use the following information to answer the next question
Numerical Response
3.
Match four of the parts of the cell numbered above with the correct descriptions as
given below.
Reactant that gains
electrons
_____ (Record in the first column)
Structure that enables ions to
move within the cell
_____ (Record in the second column)
Structure that enables
electrons to move
_____ (Record in the third column)
Cathode (positive electrode)
_____ (Record in the fourth column)
(Record your answer in the numerical-response section on the answer sheet.)
Use the Following information to answer the next question
Numerical Response
4.
Voltaic and electrolytic cells have similar and unique aspects. Match each of the
characteristics of electrochemical reactions shown above to its corresponding
description as given below.
Characteristic that is unique to _____ (Record in the first column)
a voltaic cell
Characteristic that is unique to _____ (Record in the second column)
an electrolytic cell
Characteristic that is common _____ (Record in the third column)
to both voltaic and electrolytic
cells
Characteristic that is common _____ (Record in the fourth column)
to both voltaic and electrolytic
cells
(Record your answer in the numerical-response section on the answer sheet.)
GLO 11: compare modern and traditional methods for the extraction of metals and for protection from corrosion;
29. In order to purify copper metal in order to make copper wire. Which of the following is
true
a. A voltaic cell is used
b. An electrolytic cell is used
c. A polar cell is used
d. None of the above
GLO 12: identify materials used in daily life that are based upon Alberta’s petrochemical industry and that involve
changes in energy;
30. Which of the following are created using petrochemicals?
a. Fleece jackets
b. Cosmetics
c. Plastic bags
d. All of the above
GLO 13: identify the physical characteristics of hydrocarbons, including trends with respect to melting and boiling
points and solubility of alkanes, alkenes and alkynes
31. You are given two samples one you are told is an alkane the other is an alkyne. In order to
identify them you boil the two substances and find that substance A has a lower boiling
point than substance B. According to this information you know
a. Substance A is the Alkane
b. Substance B is the Alkane
32. You are given two samples of Alkanes. At room temperature substance C is a solid and
Substance D is a liquid. Based on this information you know
a. Substance C has fewer carbons than substance D
b. Substance D has fewer carbons than substance D
GLO 14: provide International Union of Pure and Applied Chemistry (IUPAC) names and structural formulas for
simple and noncyclic hydrocarbons in the homologous series of alkanes, alkenes and alkynes that contain up to
eight carbon atoms in the parent chain
33. Given the formula C8H14 you know that this molecule is a
a. Alkane
b. Alkene
c. Alkyne
d. None of the above
34. Given the formula C6H12 you know that it is an ______i______ and also considered
______ii______
The statements above are completed by the information in row
Row
A
B
C
D
i
Alkane
Alkene
Alkane
Alkene
ii
Saturated
Saturated
Unsaturated
Unsaturated
Use the following picture for the next question
35. The name for the molecule depicted above is
a. Hexane
b. Hexene
c. Hexyne
Use the following picture for the next question
36. The name for the molecule depicted above is
a. 2,4,4-methylpentane
b. 2,4,4-trimethylpentane
c. 2,2,4-methylpentane
d. 2,2,4-trimethylpentane
Use the following picture for the next question
37. The name for the molecule depicted above is
a. 3,3-ethyl-4-hexyne
b. 3,3-ethyl-2-hexyne
c. 3,3-diethyl-4-hexyne
d. 3,3-diethyl-2-hexyne
Use the following picture for the next question
38. The name for the molecule depicted above is
a. octane
b. 4-ethylhexane
c. 3-ethylhexane
d. 2-ethyloctene
GLO 15: identify hydrocarbons as a source of fossil fuels and explain the processes of fractional distillation to refine
petroleum and catalytic cracking to produce ethene (ethylene)
Use the following diagram to answer the next question
39. Which of the following Hydrocarbons would be present at the bottom of the distillation
tower?
a. C2H6
b. C4H8
c. C6H10
d. C8H18
GLO 16: classify, balance and apply mole ratios to important hydrocarbon reactions:
Use the following information to answer the next question
40. When the equation above is balanced using whole-number coefficients, the coefficients for
propane, oxygen, carbon dioxide, and water are, respectively,
a. 1, 3, 4, and 5
b. 2, 5, 3, and 8
c. 1, 5, 3, and 4
d. 2, 3, 8, and 5
Use the following information to answer the next question
Numerical Response
5.
Match each of the unbalanced equations numbered above with its reaction type
listed below.
Hydrocarbon combustion
_____ (Record in the first column)
Catalytic cracking
_____ (Record in the second column)
Polymerization
_____ (Record in the third column)
Hydrogenation
_____ (Record in the fourth column)