chemistry 2011 - 2012 hs - wikispaces · chemistry. 2011 - 2012 ... 3. g. 6. h. 1. j. 13 which...

Student Name and Date

End of CourseHS

Chemistry

djutras

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2011 - 2012

djutras

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Baltimore City Public Schools Assessments End of Course High School Chemistry

Which of the following statements is NOT TRUE?

A. Protons are positively charged sub atomic particles found inside the nucleus of an atom.

B. Electrons are negatively charged sub atomic particles found outside the nucleus of an atom.

C. Neutrons are neutral particles found outside the nucleus of an atom.

D. The fundamental building blocks of atoms are the electrons, protons and the neutrons.

1 Which electron dot diagram represents an atom of chlorine in the ground state?

A.

B.

C.

D.

3

The charge of a hydrogen (H) atom is

F. determined by the number of electrons Hydrogen contains.

G. negative since the electron of Hydrogen is found further out from the nucleus.

H. positive since the proton of Hydrogen is much heavier than the electron.

J. zero since Hydrogen atom contains equal number of electrons and protons.

2

C I

C I

C I

C I

How do the charge and mass of an electron compare to the charge and mass of a proton?

F. An electron has the same charge and the same mass as a proton.

G. An electron has the same charge, but a smaller mass than a proton.

H. An electron has the opposite charge but a smaller mass than a proton.

J. An electron has the opposite charge and the same mass as a proton.

4

Baltimore City Public Schools Assessments End of CourseChemistry High School

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Of the following statements, which is TRUE about atomic size?

Atomic size generally

A. remains constant within a period.

B. remains constant within a group.

C. increases from left to right across a period.

D. decreases from left to right across a period.

5 8 Aluminum has a total of 13 electrons and is located in group 3A.

How many valence electrons does one atom of aluminum have?

F. 3

G. 6

H. 1

J. 13

Which group of elements should have similar chemical properties?

F. Li, Be, B, C

G. B, Al, Ga, In

H. K, Ca, Ga, Ge

J. Sr, Sc, S, Se

6

Which of the following metals is expected to be the least reactive?

A. gold

B. potassium

C. sodium

D. lithium

7

The non-metals in Groups 15 (5A), 16 (6A), and 17 (7A)

A. gain electrons when they form ions.

B. lose electrons when they form ions.

C. all form ions with a +1 charge.

D. All form ions with a -1 charge.

9

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Which Lewis electron-dot diagram is correct for CO2?

F.

G.

H.

J.

10 12 The outer structure of the Statue of Liberty is made of copper metal. Over time, a thin green layer of oxidation called patina forms on the copper sur-face. When copper oxidized to form this green layer, the copper atoms

F. gained protons.

G. gained electrons.

H. lost electrons.

J. lost protons.

11 Fluorine is classified as a group 7A (17) nonmetal. The fluoride ion is most likely expected to have a charge of

A. +7.

B. -1.

C. -7.

D. +1.

13 The mass of one mole of H2SO4 ist

A. 68 grams.

B. 78 grams.

C. 98 grams.

D. 150 grams.

O

C Ox x

xx

xx

C Ox x

xx

xxO

C Oxx

xxOx

xxx

O

C Ox x

xx x

O


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Identify the hydrocarbon among the following compounds.

F. Li2CO3

G. CHCI3

H. CO2

J. NaCl

14 Which of the following would be a good electrolyte?

F. A NaCl solution, because it would conduct electricity well.

G. A NaCl solution, because it would conduct electricity poorly.

H. Pure water, because it would conduct electricity well.

J. Pure water, because it would conduct electricity poorly.

16

Which of the following will speed up the process of dissolving a sample during an experiment?

A. crushing up the solute

B. stirring the solution

C. heating up the solution

D. all would speed up the process

15

Which subatomic particle is normally found outside the nucleus?

A. electron

B. neutron

C. proton

D. photon

17

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Which equation represents a double displacement reaction?

F. 2HCl + Zn → ZnCl2 + H2

G. LiOH + HBr → LiBr + H2O

H. H2CO3 → H2O + CO2

J. 2NaHCO3 → Na2CO3 + H2O + CO2

18 The following equation is a neutraliza-tion reaction. Which compound is the salt?

HCl + NaOH → NaCl + H2O

F. HCl

G. H2O

H. NaOH

J. NaCl

20

Which of the following compounds is an acid?

A. HCI

B. KOH

C. KCI

D. NaCl

19

21 Temperature tells you

A. the total thermal energy in a sample.

B. the average kinetic energy in a sample.

C. whether a sample is a solid, liquid, or gas.

D. the speed at which the particles in a sample are moving.


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Use the graph below to answer questions 22 – 23.

In the graph above, what is happening at a heating time of 4 minutes?

F. The substance is freezing.

G. The substance is melting.

H. The substance is boiling.

J. It is impossible to tell.

22 23 At a heating time of 2 minutes

A. the particles are moving more slowly than at a heating time of 5 minutes.

B. the particles are moving more rapidly than at a heating time of 5 minutes.

C. the particles are moving at the same speed than at a heating time of 5 minutes.

D. it is impossible to tell.

Heating Time (min)

Tem

pera

ture

(K)

1800

1400

1000

600

200

Temperature Over Time

1 2 3 4 5 6 7 8 9 10

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The graph below shows a heating-cooling curve for a substance. During which segment is the substance boiling?

F. segment AB

G. segment BC

H. segment DE

J. segment EF

24Temperature

A

Time

BC

DE

F

Temperature

A

Time

BC

D E

F

25 The graph below shows a heating curve for a substance. During which segment is the substance changing from a solid to liquid?

A. segments DE

B. segments BC

C. segments AB

D. segments EFTemperature

A

Time

BC

DE

F

Temperature

A

Time

BC

D E

F

The pressure inside a pressure cooker is greater than 1 atm. This will cause the boiling temperature of water to be

________ than 100°C, so food will cook _______ than normal.

F. lower; faster

G. higher; slower

H. lower; slower

J. higher; faster

26


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A chemical reaction is determined to be endothermic. Which of the following is true about this reaction?

A. Heat is released during the reaction.

B. Heat is absorbed during the reaction.

C. The reaction can only occur at very low temperatures.

D. The reaction can only occur at very high temperatures.

27

Which of the following is an example of an element?

F. steel

G. air

H. copper

J. alcohol

28

Which statement best describes the following equation:

2H2 (g) + O2 (g) → 2H2O (l) + energy

A. A chemical bond is formed and energy is absorbed.

B. A chemical bond is formed and energy is released.

C. A chemical bond is broken and energy is absorbed.

D. A chemical bond is broken and energy is released.

29

What is the IUPAC name for the compound FeS?

A. Iron (III) sulfate

B. Iron (III) sulfide

C. Iron (II) sulfide

D. Iron (II) sulfate

31

The formula for ammonium sulfate is

F. (NH4)2SO4

G. (NH4)2(SO4)2

H. NH4SO4

J. NH4(SO4)2

30

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32 One molecule of carbon dioxide gas contains

A. two atoms of carbon and one atom of oxygen.

B. one atom of carbon and two atoms of oxygen.

C. one atom of carbon and one atom of oxygen.

D. two atoms of carbon and two atoms of oxygen.

The formula “OH–” represents the

A. hydride ion.

B. hydroxide ion.

C. hydronium ion.

D. oxide ion.

33

Given the unbalanced chemical reaction:

FeCl3 + NaOH → Fe(OH)3 + NaCl

The coefficient that should appear in front of the sodium ion is

F. one.

G. two.

H. three.

J. four.

34

Which of the following balanced equa-tions represents the reaction between magnesium metal and hydrochloric acid to produce aqueous magnesium chloride and hydrogen gas?

A. 2MgCl2 (aq) + H2 (g) → Mg (s) + 2HCl (aq)

B. 2Mg (s) + HCl (aq) → 2MgCl2 (aq) + H2 (g)

C. Mg (s) + 2HCl (aq) → MgCl2 (aq) + H2 (g)

D. 2Mg (s) + 2HCl (aq) → MgCl2 (aq) + 2H2 (g)

35

What is the word equation for the following formula equation:

C2H5OH + O2 → CO2 + H2O + energy

F. Carbon dioxide + water → ethanol + oxygen + energy

G. Ethanol + oxygen → carbon dioxide + water + energy

H. Ethanol + oxygen + energy → carbon dioxide + water

J. Ethanol + oxygen + energy → carbon dioxide + water + energy

36


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Change the following equation from a formula equation to a word equation:

KOH (aq) + MgCl2 (aq) → KCl (aq) + Mg(OH)2 (s)

A. Potassium added to magnesium yields chloride and hydroxide.

B. Potassium hydroxide added to mag-nesium chloride yields potassium chloride and magnesium hydroxide.

C. Potassium chloride added to magnesium chloride yields potas-sium hydroxide and magnesium hydroxide.

D. Potassium oxide added to mag-nesium chloride yields potassium chloride and magnesium oxide.

37

Which process below represents a chemical change?

F. crystallization of sugar

G. melting of ice

H. evaporation of water

J. corrosion of copper

38

39 A silver nitrate solution is mixed with a potassium bromide solution. The most likely precipitate formed is

A. potassium nitrate.

B. silver bromide.

C. nitrate bromide.

D. silver potassium.

Which type of reaction is represented by the following equation:

2MgO → 2Mg + O2

F. single-displacement

G. double-displacement

H. synthesis

J. decomposition

40

41 The desired product for a combustion reactions is

A. carbon monoxide.

B. oxygen.

C. heat energy.

D. carbon dioxide.

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Given the following chemical equation:

KClO3 → KCl +O2.

How many KCl ions would be in the balanced equation?

F. 2

G. 1

H. 4

J. 3

42 44 Given the reactants:

4Fe + 3O2 → 2X

What would the product be?

F. Fe3O2

G. Fe2O3

H. Fe3O4

J. FeO

Given the chemical equation:

X + Cl2 → C2H5Cl + HCl

Which molecule is represented by the letter X ?

A. C3H6

B. C2H6

C. C3H8

D. C2H4

43

45 Which of the following represents the balanced equation when methane burns in oxygen producing carbon dioxide and water?

A. CO2 + H2O → CH4 + O2

B. 2 CH4 + 2 O2 → 2 CO2 + 2 H2O

C. CH4 + O2 → CO2 + H2O

D. CH4 + 2 O2 → CO2 + 2 H2O


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46 Given the balanced equation representing the reaction:

F2 (g) + H2 (g) → 2HF (g)

What is the mole ratio of H2 (g) to HF (g) in this reaction?

F. 2 : 3

G. 1 : 1

H. 1 : 2

J. 2 : 1

Water has a gram molecular mass of 18.0 grams per mole. How many grams of water would be found in 2.50 moles of water?

A. 7.20 grams

B. 45.0 grams

C. 0.139 grams

D. 2.50 grams

47

48 Which of the following does not influ-ence the rate of a chemical reaction?

F. the temperature at which the reaction proceeds

G. the concentration of the reactants

H. the presence of a catalyst

J. the volume of the reaction container

Which of the following is an example of an heterogeneous mixture?

A. brass

B. vegetable soup

C. maple syrup

D. salt water

49

An example of a chemical reaction is

F. the bending of a nail.

G. the burning of paper.

H. the evaporation of water.

J. the melting of ice.

50

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BCR 1 Write out the steps to show how the following form into a compound

a) N+5 and O-2 b) Al+3 and S-2

In your answer be sure to discuss the following:

• how to use Lewis dot structure to show how the compound is formed

• determine if the compound is ionic or covalent

• the method for determining the ending of the elements’ names

• the correct prefixes and why they are used

• how to determine the order of the names

Continue on next page »


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BCR 2 Describe the structure of an atom of Sulfur ( 32S16 ) and give the characteristics of the subatomic particles present.

Be sure to include in your answer:

• the number of each subatomic particle and its charge

• where each particle is located

• describe the central portion of the atom in terms of its size compared to the rest of the atom

• describe the central portion of the atom in terms of its mass relative to the rest of the atom

• a diagram or drawing of the atom



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BCR 3 Write a paragraph about acids and bases. Use complete sentences and write grammatically.

Include:

• a common household example of each

• taste

• feel

• what is the pH of an acid, base, and neutral substance

• what color is litmus paper in an acid and base?

• write a balanced reaction of an acid and a base.



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BCR 4 Label each change below as a physical (PHYS) or chemical change (CHEM).

A. pepper is ground

B. two clear liquids are mixed and foam forms

C. a solution is poured from a bottle into a flask

D. calcium carbonate is powdered in a mortar and pestle

E. a metal is burned and forms a grey ash

F. sugar is used to create energy for the body

G. juice is squeezed from an orange

H. gasoline is burned in an engine


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BCR 5 Fill in the blanks for the elements in this chart. For the purposes of this chart, round all atomic masses to the nearest whole number.

ElementNumber of

ProtonsNumber of Neutrons

Number of Electrons

Atomic Mass

Atomic Number

lithium

carbon

chlorine

silver

lead

calcium

tantalum

radium

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BCR 6 Draw a Lewis dot structure for nitrogen trichloride (NCl3).


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BCR 7 Draw a Bohr diagram for aluminum.

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BCR 8 For the following reaction:

Mg + Fe2O3 → Fe + MgO

• balance the reaction

• list the type of reaction

• give the names for Fe2O3 and MgO, and explain why magnesium would take the place of iron in this reaction

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chemistry 2011 - 2012 hs - wikispaces · chemistry. 2011 - 2012 ... 3. g. 6. h. 1. j. 13 which...

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