Free Printable Unit 5 Study Guide

1.

Chemical Reaction

a)

a substance formed as a result of a chemical reaction

b)

a change in matter that produces one or more new substances

c)

the process in which substances undergo chemical changes that result in the formation of new substances

d)

a substance that enters into a chemical reaction

2.

Chemical Equation

a)

A representation of a chemical reaction

b)

the starting materials in a chemical reaction

c)

the new substances that are formed in a chemical reaction

d)

tells how many atoms, molecules, or formula units take part in a reaction

3.

The Law of Conservation of Matter

a)

tells how many atoms of an element are contained in one molecule or formula unit.

b)

the starting materials in a chemical reaction

c)

the new substances that are formed in a chemical reaction

d)

A law stating that atoms are not created or destroyed during a chemical reaction.

4.

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

a)

yes

b)

no

5.

Balance this equation

_Al +_HCl --> _H₂+_AlCl₃

a)

2,6,3,2

b)

it's already balanced

c)

4,12,3,4

d)

2,1,4,5

6.

The coefficient in 3H₂O is

a)

6

b)

5

c)

2

d)

3

7.

How many atoms of carbon (C) are in C₆H₁₂O₆?

a)

3

b)

6

c)

12

d)

24

8.

How many Sodium (Na) are in 6NaCl?

a)

1

b)

12

c)

6

9.

How many Hydrogen are in 4H₂O?

a)

6

b)

8

c)

2

d)

4

10.

Is this equation balanced?

a)

yes

b)

no

c)

Not enough information

11.

What is a coefficient?

a)

The small number on the right of the chemical symbol.

b)

The large number in front of a chemical formula.

c)

The number in between the chemical symbols.

d)

The number behind a chemical formula.

12.

What is the part of the chemical equation in green called?
Fe + S --> FeS

a)

products

b)

reactants

c)

yield

d)

chemical formula

13.

What is the little number after an element in a chemical equation called.
Example: H₂

a)

Coefficient

b)

Subscript

c)

Atom

d)

Equation

14.

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO

a)

1

b)

2

c)

3

d)

4

15.

Which problem is balanced?
(Check ALL answers)

a)

PbO₂ + 2H₂

b)

SO₂ + H₂0 --> H₂SO₄

c)

2Na + 2H₂O --> 2NaOH + H₂

16.

Element or compound?
H₂O

a)

element

b)

compound

17.

Is the equation balanced?: 2H₂O + O₂ --> 4MgO + 3Fe

a)

yes

b)

no

18.

What is the right part of a chemical equation called...
2H_{2 +}O₂ --> 2H₂O

a)

Reactants

b)

Products

c)

Yields

d)

Chemical Equation

19.

What is the total number of atoms present in 5Na₃PO₄

a)

5

b)

40

c)

55

d)

8

20.

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

a)

yes

b)

no

21.

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

a)

yes

b)

no

22.

Is the following reaction balanced?
NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

a)

yes

b)

no

23.

Is the following reaction balanced?
2CH₃OH + 3O₂ --> 2CO₂ + 4H₂O

a)

yes

b)

no

24.

How many Oxygens are in this molecule?
(OH)₂

a)

4

b)

1

c)

2

d)

3

25.

What are the smaller numbers that you CANNOT change in a chemical equation?

a)

Coefficient

b)

Products

c)

Reactants

d)

Subscript

26.

What are the larger numbers that you CAN CHANGE in a chemical equation?

a)

Coefficient

b)

Products

c)

Reactants

d)

Subscripts

27.

How many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl₂ + H₂

a)

1

b)

2

c)

3

d)

4

28.

Pb(NO₃)₂ + KI --> PbI₂ + KNO₃
What type of reaction is this?

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

29.

__Na + O₂ -----> __Na₂O
Type of reaction?
Balance it too. :)

a)

Synthesis, 2Na / 4Na₂O

b)

Decomposition, 4Na / 2Na₂O

c)

Synthesis, 4Na / 2Na₂O

d)

Decomposition, 2Na / 4Na₂O

30.

What type of reaction is this?
__H₂O₂ ----> __H₂O + O₂

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

31.

What law governs the balancing of chemical equations?

a)

Law of Energy

b)

Law of Conservation of Matter/Mass

c)

Law of Gravity

d)

Law of Matter Movement

32.

Balance this chemical reaction......?
__H₂O₂ ----> __H₂O + O₂

a)

2H₂O_{2 //}2H₂O

b)

1H₂O_{2 //}2H₂O

c)

2H₂O_{2 //}1H₂O

d)

H₂O_{2 //}2H₂O

33.

The following is what type of reaction:
PbCl₂ + AgNO₃ → Pb(NO₃)₂ + AgCl

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

34.

The following is what type of reaction:
NH₃ + HCl → NH₄Cl

a)

Synthesis

b)

Decomposition

c)

Single Replacement Replacement

d)

Double Replacement Replacement

35.

What is decomposition?

a)

putting substances together

b)

breaking substances apart

c)

element replacing another element in a compoud

d)

burning of a subtance

36.

What type of chemical reaction is this?
Al(OH)₃ → Al₂O₃ + H₂O

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

37.

Ions in two compounds switch.

a)

Synthesis

b)

Combustion

c)

Single Replacement

d)

Double Replacement

38.

3Ca + 2AlCl₃ --> 3CaCl₂+2Al

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

39.

One element replaces another in a compound.

a)

Synthesis

b)

Combustion

c)

Single Replacement

d)

Double Replacement

40.

One reactant into several products.

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

41.

Always starts with a Hydrocarbon that reacts with oxygen and produces carbon dioxide and water.

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

42.

Two Reactants and One Product

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

43.

4Si + S₈ --> 2Si₂S₄

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Double Displacement

44.

C₄H₁₂ + O₂ → CO₂ + H₂O

a)

Synthesis

b)

Combustion

c)

Single Replacement

d)

Double Replacement

45.

2Pb(NO₃)₂ --> 2PbO + 4NO₂ + O₂

a)

Synthesis

b)

Decomposition

c)

Single Displacement

d)

Combustion

46.

3KOH + H₃PO₄ --> K₃PO₄+3H₂O

a)

Synthesis

b)

Decomposition

c)

Single displacement

d)

Double displacement

47.

CxHy +O₂--> H₂O + CO₂

a)

Decomposition

b)

Double replacement

c)

Combustion

d)

Single Replacement

48.

One reactant into several products.

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

49.

One element replaces another in a compound.

a)

Synthesis

b)

Combustion

c)

Single Replacement

d)

Double Replacement

50.

KOH + H₃PO₄ --> K₃PO₄+H₂O

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Double replacement

51.

Si + S₈ --> Si₂S₄

a)

Synthesis (combination)

b)

Decomposition

c)

Single replacement

d)

Double replacement

52.

Which is the correct chemical equation for the following: Solid Zn reacts with silver (I) chloride to produce Zinc (II) chloride and silver metal

a)

Zn + AgCl → ZnCl₂+ Ag

b)

ZnCl₂ + Ag → Zn + AgCl

c)

ZnCl2 + Ag₂ → Zn + AgCl

d)

Zn₂Cl + Ag → Zn + AgCl

53.

Which is the correct chemical equation for the following: Barium Chloride combined with sodium sulfide yields barium sulfide and sodium chloride

a)

BaCl + NaS → BaS+ NaCl

b)

BaCl₂ + Na₂S → BaS+ NaCl

c)

BaS+ NaCl → BaCl + NaS

d)

BaCl₂ + Na₂S → BaS+ NaCl₂

54.

Which is NOT a diatomic molecule?

a)

Fluorine

b)

Nitrogen

c)

Boron

d)

Bromine

55.

Magnesium can be burned in oxygen to produce solid magnesium oxide.

a)

Mg(s) + O₂(g)→ MgO(s)

b)

Mg(s) + O(g) → MgO(s)

c)

Mg(s) + CO₂(g)→ MgO(s) + C(s)

d)

Mg(s) + O₂(g)→ Mg₂O₂(s)

56.

Which compounds are the PRODUCTS of this reaction?

a)

CO₂ + H₂O

b)

C₆H₁₂O₆ + O₂

c)

C₆H₁₂O₆+ CO₂

d)

H₂O + O₂

57.

Which are the reactants in the following reaction?

2Mg + O₂ ---> 2MgO

a)

2MgO

b)

2Mg +O

c)

2Mg + O₂

58.

True/False: There are 2 reactants in the chemical equation below.
$KClO_3\ \rightarrow\ KCl\ +\ O_2$

a)

True

b)

False

59.

True/False: There are 2 reactants in the chemical equation below.
$H_2\ +\ Cl_{2\ }\rightarrow\ HCl\$

a)

True

b)

False

60.

Translate the word equation below:

Nitrogen reacts with Hydrogen to form Ammonia (NH₃).

a)

$N\ \ \rightarrow\ H\ +\ NH_3$

b)

$N_2\ +\ H_2\ \rightarrow\ NH_3$

c)

$N\ +\ H\ \rightarrow\ NH_3$

d)

$N_2\ \rightarrow\ H_2\ +\ NH_3$

61.

Translate the word equation below.

Hydrogen and Carbon Dioxide react to form Carbonic Acid (H₂CO₃).

a)

$H\ +\ CO_2\ \rightarrow\ H_2CO_3$

b)

$H\ \rightarrow\ CO_2\ +\ H_2CO_{3_{ }}$

c)

$H_2\ +\ CO_2\ \rightarrow\ H_2CO_3$

d)

$H_2\ \rightarrow\ CO_2\ +\ H_2CO_3$

62.

Translate the word equation below.

Carbon Dioxide and Hydrogen react to form Methane (CH₄) and Water

a)

$CO_{2_{\ }}+\ H_2O\ \rightarrow\ CH_4\ +H_2\$

b)

$CO_2\ \rightarrow\ H_2\ +\ CH_4\ +\ H_2O$

c)

$CO_2\ \ +\ H_2\ +\ CH_4\ \ \rightarrow\ H_2O$

d)

$CO_2\ \ +\ H_2\ \rightarrow\ CH_4\ +\ H_2O$

63.

Translate the word equation below.

Sulfur Trioxide reacts with Water to form Sulfuric Acid (H₂SO₄).

a)

$SO_3\ +\ H_2O\ \rightarrow\ H_2SO_4$

b)

$SO_3\ \rightarrow\ H_2O\ +\ H_2SO_4$

c)

$SO_2\ +\ H_2O\ \rightarrow\ H_2SO_4$

d)

$SO\ \rightarrow\ H_2O\ +\ H_2SO_4$

64.

Translate the word equation below.

Aluminum and Hydrochloric Acid (HCl) react to form Aluminum Chloride and Hydrogen

a)

$Al\ +\ HCl\ \rightarrow\ AlCl_3\ \rightarrow\ H_2$

b)

$Al\ +\ HCl\ \rightarrow\ AlCl\ +\ H_2$

c)

$Al\ +\ HCl\ \rightarrow\ AlCl_3\ +\ H_2$

d)

$Al\ +\ HCl\ \rightarrow\ AlCl\ +\ H$

65.

Translate the word equation below.

Carbon Dioxide and Water react to form Glucose (C₆H₁₂O₆) and Oxygen.

a)

$CO_2\ +\ H_2O\ \rightarrow\ C_6H_{12}O_6\ +\ O_2$

b)

$CO_2\ +\ H_2O\ +\ C_6H_{12}O_6\ \rightarrow\ O_2$

c)

$CO_2\ +\ H_2O\ \rightarrow\ C_6H_{12}O_6\ +\ O_{ }$

d)

$CO_2\ \rightarrow\ H_2O\ +\ C_6H_{12}O_6\ +\ O_2$

66.

Sodium reacts with chlorine to produce sodium chloride.

a)

NaCl(s) → Cl(g) + Na(s)

b)

Na(s) + CO₂(g) → NaCO₂(s)

c)

2Na(s) + Cl₂(g) → 2NaCl(s)

d)

Na(s) + Cl(g) → NaCl

67.

Iron reacts with sulfur to produce iron(II) sulfide powder.

a)

2Fe(s) + S(s) → Fe₂S(s)

b)

Fe(s) + S(s) → FeS(s)

c)

Fe(s) + S(g) → FeS(s)

d)

4Fe(s) + S₂(g) → 2Fe₂S

68.

What are the products formed when hydrochloric acid reacts with sodium hydroxide?

a)

sodium chloride and hydrogen

b)

sodium chloride and water

c)

sodium chloric and water

d)

chloride sodium and water

69.

What are the products when sulfuric acid reacts with calcium carbonate?

a)

calcium sulfur + water + carbon dioxide

b)

calcium sulfur+ carbon dioxide

c)

calcium sulfate + water + carbon dioxide

d)

calcium sulfate + carbon dioxide

70.

What are the products when nitric acid reacts with lithium?

a)

lithium nitrate + hydrogen gas

b)

lithium nitric + hydrogen gas

c)

lithium nitrate + water

d)

lithium nitric + water

71.

What can X be?

sulfuric acid + X --> magnesium sulfate and water

a)

magnesium

b)

magnesium oxide

c)

magnesium chloride

d)

magnesium ammonium

72.

When a CHEMICAL reaction occurs, what is made?

a)

No new substance is made.

b)

A new substance is made with new atoms formed

c)

A new substance is made, with existing atoms rearranged

d)

All substances remain the same, but physical state may change.

73.

Magnesium + hydrochloric acid --> _____________ + hydrogen

What is missing?

a)

Magnesium oxide

b)

Magnesium hydride

c)

Magnesium chloride

d)

Magnesium hydroxide

74.

Magnesium + ________ --> magnesium oxide

What is missing?

a)

Hydrogen

b)

Sulphur

c)

Oxygen

d)

Oxide

75.

Potassium iodide + lead nitrate --> _____________ + lead iodide

What is missing?

a)

lead nitrate

b)

potassium nitrate

c)

nitrogen

d)

potassium iodide

76.

Carbon monoxide + oxygen

a)

oxygen gas

b)

Carbon monoxide

c)

carbon dioxide

d)

water

Unit 5 Study Guide

Total questions: 76

Worksheet time: 19hrs 0mins

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