Free Printable Chemistry Chemical Equations

1.

Identify the Reactants in this equation.

a)

A

b)

B

2.

What state of matter is this substance?

a)

solid

b)

liquid

c)

gas

d)

aqueous

3.

Identify the number in blue.

a)

Product

b)

Reactant

c)

Coefficient

d)

Subscript

4.

In what state is this substance?

a)

solid precipitate

b)

dissolved in water

c)

released as a gas

d)

liquid

5.

How many atoms of nitrogen are in the compound shown above?

a)

1

b)

2

c)

3

d)

4

6.

What are the blue numbers called?

a)

oxidation numbers

b)

subscripts

c)

group numbers

d)

product numbers

7.

How many atoms of nitrogen are present in this molecule?

a)

1

b)

2

c)

3

d)

4

8.

Is the compound in the pink box a Reactant or a Product?

a)

Reactant

b)

Product

9.

How many molecules of KNO₃ are shown?

a)

1

b)

2

c)

3

d)

4

10.

How many atoms of oxygen are represented in the picture?

a)

2

b)

3

c)

5

d)

6

11.

The products of a reaction have the same ________as the reactants.

a)

molecule

b)

atoms

c)

subscripts

d)

coefficients

12.

When balancing this equation, Fe + Cl₂ → FeCl₃, the correct coefficient for Cl₂?

a)

1

b)

2

c)

3

d)

4

13.

Balance this equation, CaCO₃(s) → CaO(s) + CO₂(g)?

a)

3,1,2

b)

1,1,1

c)

1,3,1

d)

2,6,3

14.

Balance this equation, AlCl₃+ NaOH → Al(OH)₃ + NaCl

a)

3,1,3,1

b)

1,3,3,1

c)

1,1,1,3

d)

1,3,1,3

15.

Balance the following equation: Cr(s) + Fe(NO₃)₂(ag) → Fe(s) + Cr(NO₃)₃ (ag)

a)

2,3,3,2

b)

2,3,2,3

c)

4,6,6,2

d)

1,3,3,1

16.

Chemical equations

a)

give directions for naming compounds

b)

describe only biological changes

c)

describe chemical reactions

d)

show how to write formulas

17.

Fill in the blanks with coefficient:
PCl₅+_ H₂O→_ HCl+H₃PO₄

a)

4, 5

b)

1, 6

c)

3, 8

d)

2,2

18.

Balance this equation
_Zn+_HCl-->_ZnCl₂+_H₂

a)

1,1,2,1

b)

1,1,1,2

c)

1,2,1,1

d)

2,1,1,1

19.

Balance this equation.
_Mg + _Cl₂--> _MgCl₂

a)

1, 2,1

b)

already balanced

c)

2,1,1

d)

1,1,2

20.

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂--> 2Al₂O₃

a)

2

b)

6

c)

1

d)

4

21.

At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?

a)

the product is doubled

b)

the product is half the mass of the reactants

c)

the mass is the same

d)

the mass changes depending on the reaction

22.

To balance a chemical equation, it may be necessary to adjust the

a)

formulas of the products

b)

subscripts

c)

coefficients

d)

number of products

23.

What does the Law of Conservation of Matter state?

a)

Matter cannot be created or destroyed in a chemical reaction, it just changes into something new/changes form.

b)

Matter can only be lost in a chemical reaction.

c)

Matter can only be gained in a chemical reaction.

d)

Matter can be gained and lost in a chemical reaction.

24.

How many elements are in C₆H₁₂O₆?

a)

1

b)

6

c)

3

d)

24

25.

How many atoms are there TOTAL in:
H₂SO₄

a)

6

b)

5

c)

7

d)

3

26.

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)

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

27.

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)

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

28.

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)

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

29.

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)

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

30.

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)

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

31.

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)

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

32.

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

a)

Mg + O₂→ MgO

b)

Mg+ O→ MgO

c)

Mg + CO₂→ MgO + C

d)

Mg + O₂→ Mg₂O₂

33.

Sodium reacts with chlorine gas to produce sodium chloride.

a)

NaCl→ Cl + Na

b)

Na+ CO₂ → NaCO₂

c)

Na + Cl₂→ NaCl

d)

Na + Cl → NaCl

34.

When hydrogen reacts with sulfur, a smelly gas, dihydrogen monosulfide, is produced.

a)

H₂ + S → HS

b)

H₂+ S → H₂S

c)

H + S→ HS

d)

H + S→ H₂S

35.

Combining substances to form a new substance

a)

Displacement

b)

Synthesis

c)

Decomposition

d)

Oxidation

36.

Breaking down a substance into simpler substances

a)

Displacement

b)

Synthesis

c)

Decomposition

d)

Oxidation

37.

Cu + 2Ag(NO₃) → 2Ag + Cu(NO₃)

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

38.

Ca₃(PO₄)2 + 3 H₂SO₄ + 3 CaSO₄ + 2 H₃(PO₄)

a)

Synthesis Reaction

b)

Decomposition Reaction

c)

Single Displacement Reaction

d)

Double Displacement Reaction

39.

Which chemical reaction always starts with a hydrocarbon that reacts with oxygen and produces carbon dioxide and water?

a)

Decomposition

b)

Synthesis

c)

Combustion

d)

Single Replacement

40.

Which has a pH below 7?

a)

Acid

b)

Base

41.

Which has a bitter taste?

a)

Base

b)

Acid

c)

flagella

d)

cila

42.

Which has a slippery texture?

a)

Acid

b)

Base

43.

Turns litmus red

a)

Acids

b)

Bases

c)

All

44.

What pH is the strongest base?

a)

1

b)

7

c)

4

d)

14

45.

What colour does a base turn red litmus paper?

a)

Red

b)

Blue

46.

When dissolved in water, acids produce:

a)

bases

b)

salts

c)

hydrogen ions

d)

hydroxide ions

47.

Which type of ion does a base produce when it is dissolved in water?

a)

oxide

b)

oxygen

c)

hydrogen

d)

hydroxide

48.

An oxyacid is made up of hydrogen, _________, and a third element

a)

nitrogen

b)

oxygen

c)

carbon

d)

hydroxide

49.

What is the formula for nitrous acid?

a)

HNO₂

b)

H₃N

c)

HNO₃

d)

HNO

50.

What is the formula for hydrosulfuric acid

a)

H₂S

b)

H₂SO₂

c)

H₂SO3

d)

H₂SO₄

51.

Water can act as both an acid and a base according to the bronsted lowry model. This means water is

a)

neutral

b)

conjugate

c)

ionic

d)

amphoteric

52.

If a solution is basic which ion will be more present?

a)

H+

b)

K+

c)

OH-

d)

H-

53.

This ion is responsible for the properties of acids

a)

Sodium ion

b)

Hydrogen ion

c)

Hydroxide ion

d)

Oxide ion

54.

This ion is responsible for the properties of bases

a)

Sodium ion

b)

Hydrogen ion

c)

Hydroxide ion

d)

Oxide ion

55.

Which of the following is true about acids and bases?

a)

The lower the pH, the stronger the acid

b)

the higher the pH, the stronger the acid

c)

The lower the pH, the more neutral the acid

d)

The higher the pH, the weaker the base

56.

True or false: bases are sometimes called alkaline.

a)

True

b)

False

57.

Which of the following is a neutralisation reaction?

a)

metal + acid → salt + hydrogen

b)

metal + acid → salt + water

c)

carbonate + acid → salt+ carbon dioxide + hydrogen

d)

base + acid → salt + water

58.

When using the Arrhenius model, what types of ions indicate that a compound is an acid?

a)

H⁺

b)

OH^-1

59.

When using the Arrhenius model, what types of ions indicate that a compound is a base?

a)

H⁺¹

b)

OH^-1

60.

When using the Bronsted Lowry definition of acids and bases, the acid will ______________ a hydrogen proton.

a)

donate

b)

accept

61.

When using the Bronsted Lowry definition of acids and bases, the base will ______________ a hydrogen proton.

a)

donate

b)

accept

62.

Is the following compound an acid or a base?

HCl

a)

Acid

b)

Base

63.

Is the following compound an acid or a base?

NH₄OH

a)

acid

b)

base

64.

Mg(OH)₂

a)

magnesium hydroxide acid

b)

hydromagnesium acid

c)

magnesium oxygen hydride

d)

magnesium hydroxide

65.

Barium hydroxide

a)

BaOH

b)

Ba2OH

c)

Ba(OH)2

66.

CH₃COOH

a)

Acetic acid

b)

Ethanoic acid

c)

Acenous acid

d)

Hydroacetic acid

67.

The cation in an acid is always

a)

a metal

b)

hydrogen

c)

hydroxide

d)

negatively charged

68.

When the polyatomic ion in an acid ends in -ate, the root name of the polyatomic ion is followed by the ending -_____.

a)

ide

b)

ic

c)

ous

d)

ite

69.

When the polyatomic ion in an acid ends in -ite, the root name of the polyatomic ion is followed the ending -_____.

a)

ide

b)

ic

c)

ous

d)

ite

70.

What kind of compound produces a hydrogen ion when dissolved in water?

a)

ionic compound

b)

covalent compound

c)

acid

d)

base

71.

What are the products of this reaction?
Cu+ AgNO₃-->

a)

Cu(NO₃)₂+Ag

b)

CuNO₃ + Ag

c)

CuAg+NO₃

d)

Cu+ AgNO₃

72.

Predict the products for the this reaction:
K + HCl -->

a)

KCl + H2

b)

KHCl

c)

KH + Cl2

d)

KCl + H

73.

What type of reaction is this?
2 C₆H₁₄ + 19 O₂ --> 12 CO₂ + 14 H₂O

a)

Single Replacement

b)

Double Replacement

c)

Combustion

d)

Decomposition

74.

What are the correct formulas and coefficients for the products of the following single-replacement reaction?
Mg + Al(OH)₃ →

a)

No Reaction

b)

Al + Mg(OH)₃

c)

2 Al + 3 Mg(OH)₂

d)

3 Al + MgOH₃

75.

Predict the product(s): H₂O -->

a)

H and O

b)

H₂ and O₂

c)

H and OH

76.

__________ are made up of solutes and solvents.

a)

Solutions

b)

Suspensions

c)

Heterogeneous Mixtures

d)

Pure Substances

77.

NH₄NO₃

a)

soluble

b)

insoluble

78.

AgCl

a)

soluble

b)

insoluble

79.

NaCl

a)

soluble

b)

insoluble

80.

K₂SO₄

a)

soluble

b)

insoluble

81.

FeS

a)

soluble

b)

insoluble

82.

Ca(OH)₂

a)

soluble

b)

insoluble

83.

K₂CO₃

a)

soluble

b)

insoluble

84.

CaCO₃

a)

soluble

b)

insoluble

85.

What of these is always soluble?

a)

Nitrates

b)

Phosphates

c)

Carbonates

d)

Hydroxides

Chemistry Chemical Equations

Total questions: 85

Worksheet time: 3hrs 14mins

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