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Chemical Reactions Concepts

Total questions: 107

Worksheet time: 4hrs 34mins

Name
Class
Date
1.

A chemical reaction is said to have occurred if any of the following are observed (select all that apply)

a)

Production of a solid

b)

Production of heat and/or light

c)

Maintaining a stable temperature

d)

Evolution of a gas

e)

Observation of a color change

2.

In the image above, the reactants are

a)

CH4 and CO2

b)

CO2 and H2O

c)

CH4 and O2

d)

O2 and H2O

3.

In the image above, the products are

a)

CH4 and CO2

b)

CO2 and H2O

c)

CH4 and O2

d)

O2 and H2O

4.

What are the seven diatomic elements?

a)

H2, Cl2, Br2, O2, N2, I2, F2

b)

H2, Cl2, I2, F2, Hg2, Br2, Fe2

c)

H2, Cu2, Ni2, B2, O2, I2, Fe2

5.

What are diatomic elements?

a)

Elements that form two-atom molecules when not combined in a compound.

b)

Two elements that combine with one atom from each element.

c)

Elements that are always in pairs no matter what.

6.

What number do the diatomic elements form on the periodic table?

a)

7

b)

1

c)

2

7.

The law of conservation of mass states that ________

a)

the total mass of reactants is more than the total mass of products

b)

the mass of a chemical reaction is not constant

c)

the mass of a chemical reaction remains constant

d)

the total mass of reactants is less than the total mass of products

8.

Which chemical equation supports the law of conservation of mass?

a)

Equation (a)

b)

Equation (b)

c)

Equation (c)

d)

Equation (d)

9.

When writing a chemical equation, reactants are on the _____________ while products are on the _________________.

a)

top, bottom

b)

right, left

c)

left, right

d)

bottom, top

10.
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.
11.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
12.
Which problem is balanced?
(Check ALL answers)
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
13.
Which of the following symbols is not a correct indication of the phase of a substance in a reaction? 
a)
(s)=solid
b)
(g)=grams
c)
(l)=liquid
d)
(aq)= aqueous
14.

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

15.

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

16.

What are the coefficients that would properly balance this equation?

__Ca + __H2O --> __Ca(OH)2 + __H2

a)

2,1 --> 2,1

b)

1,2 --> 1,1

c)

1,2 --> 2,4

d)

1,2 --> 2,1

17.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CO + __Fe2O3--> __Fe + __CO2
a)
3,1 --> 2,3
b)
3,2 --> 1,1
c)
3,2 --> 2,4
d)
3,2 --> 2,1
18.

What are the coefficients that would properly balance this equation?

__AgNO3 + __H2S --> __Ag2S+ __HNO3

a)

2,1 --> 1,2

b)

1,2 --> 1,1

c)

1,2 --> 1,2

d)

1,2 --> 2,1

19.

What type of reaction involves the breaking down of a substance into simpler substances?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

20.

What type of reaction involves 2 substances combining to form 1 new compound?

a)

Decomposition Reaction

b)

Single Replacement Reaction

c)

Double Replacement Reaction

d)

Synthesis Reaction

21.

What type of reaction involves one element replacing another element in a compound?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

22.

What type of reaction involves ions from 2 compounds exchanging places to form 2 completely new compounds?

a)

Single Replacement Reaction

b)

Double Replacement Reaction

c)

Synthesis Reaction

d)

Decomposition Reaction

23.

What type of chemical reaction is this one?

Al(OH)3 --> Al2O3 + H2O

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

24.

What type of chemical reaction is this one?

CUO + CO2 --> CuCO3

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

25.

What type of chemical reaction is this one?

Ca + MgCl2 --> CaCl2 + Mg

a)

Decomposition

b)

Combustion

c)

Synthesis

d)

Single Replacement

26.

3KOH + H3PO4 --> K3PO4 + 3H2O

a)

Combination

b)

Decomposition

c)

Single replacement

d)

Double replacement

27.
CxHy +O2 --> H2O + CO2
a)
Decomposition
b)
Double replacement
c)
Combustion
d)
Single Replacement
28.
Pb(NO3)2 --> PbO + NO2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
29.

Predict the products if Calcium Carbonate reacts with Silver Sulfate.

CaCO3 + Ag2SO4 → ?

a)

Ag2CO3 + Ca2SO4

b)

AgCO3 + CaSO4

c)

CaSO4 + Ag2CO3

d)

Ag(CO3)2 + CaSO4

30.
The following is what type of reaction:
NH3 + HCl  → NH4Cl
a)
Synthesis
b)
Decomposition
c)
Single Replacement Replacement
d)
Double Replacement Replacement
31.
C4H12 + O2 → CO2 + H2O
a)
Synthesis
b)
Combustion
c)
Single Replacement
d)
Double Replacement
32.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

33.

Predict the products for the this Double Replacement reaction:

AgNO3 + KCl →

a)

AgCl + KNO3

b)

AgK + ClNO3

c)

KAg + NO3Cl

d)

AgCl + 3 KNO

34.

Complete the balanced equation for this Double Replacement reaction.

3 NaOH + Fe(NO3)3 →

a)

NaFe + OH(NO3)3

b)

NaNO3 + Fe(OH)3

c)

3 NaNO3 + Fe(OH)3

d)

3 NaFe + 3 (OH)NO3

35.

Predict the products for the decomposition of aluminum oxide, Al2O3 →

a)

Al + O2

b)

O + Al2

c)

Al2 + O3

d)

Al + O

36.

Predict the products for the this Single Replacement reaction: (Copper has a charge of 1+)

Mg + CuCl →

a)

MgCl2 + Cu

b)

Mg + Cu

c)

MgCu + Cl2

d)

MgCl + Cu2

37.

What are the products of this reaction:

C2H4 + O2 →

a)

C2O2 + H4

b)

CO2 + H2 + O2

c)

CO + H

d)

CO2 + H2O

38.

Predict the products of this single replacement reaction: Na + H2O →

a)

NaO + H2

b)

NaOH + H2

c)

NaH + O2

d)

ONaH

39.

Fill in the blank. (Copper has a charge of +2)

Cu+ AgNO3--> Ag + _____

a)

Cu(NO3)2

b)

CuNO3

c)

CuAg

d)

Cu

40.

To predict if a single replacement reaction will take place you should use the____________ __________

a)

Activity series

b)

Solubility Chart

c)

Periodic Table

41.

When predicting a double replacement reaction we use the__________ ________ to help us determine if a solid is produced or not

a)

Activity series

b)

Solubility Chart

c)

Periodic Table

42.

What is the name for the solid formed during a reaction?

a)

Precipitate

b)

Rocks

c)

Aqueous

43.

The symbol for a substance dissolved in solution is ______

a)

(s)

b)

(l)

c)

(aq)

44.

Is the following substance soluble or insoluble?

NaNO3

a)

Soluble

b)

Insoluble

45.

Is the following substance Soluble or insoluble?

AlPO4

a)

Soluble

b)

insoluble

46.
KBr
a)
Soluble
b)
Insoluble
47.
Silver Iodide
a)
Soluble 
b)
Insoluble 
48.
Zinc Carbonate
a)
Soluble 
b)
Insoluble 
49.
KOH
a)
Soluble 
b)
Insoluble
50.
Silver acetate
a)
Soluble 
b)
Insoluble
51.
NiCl2
a)
Soluble 
b)
Insoluble
52.
PbI2
a)
Soluble
b)
Insoluble
53.
NaC2H3O2
a)
soluble
b)
insoluble
54.
K2CO3
a)
soluble
b)
insoluble
55.
CaCO3
a)
soluble
b)
insoluble
56.
Based on the activity series, will this reaction occur?
Ni (s) + H2O (l) →
a)
Yes
b)
No
57.
Based on the activity series, will this reaction occur?
Br2 (l) + KI (aq) →
a)
Yes
b)
No
58.
Based on the activity series, will this reaction occur?
Au (s) + HCl (l) →
a)
Yes
b)
No
59.
Based on the activity series, will this reaction occur?
Cd (s) + HCl (aq) →
a)
Yes
b)
No
60.
A mixture contains cobalt metal, copper metal, and tin metal. This mixture is mixed with nickel nitrate. Which metals, if any, will react? 
a)
Cobalt only
b)
Copper only
c)
Tin only
d)
All 3
61.

Predict the product(s) of this reaction (don't worry about balancing):

Li + H2O →

a)

Li2O + H2

b)

LiO + H2

c)

LiOH + H2

d)

Li(OH)2

62.

Predict the product(s) of this reaction (don't worry about balancing):

Mg + HCl →

a)

MgHCl

b)

MgCl2 + H2

c)

MgCl2 + H

d)

MgCl + H2

63.

Predict the product(s) of this reaction (don't worry about balancing):

SrI2 +Br2→

a)

Sr + I2Br2

b)

SrBr + I2

c)

SrBr2 + I2

d)

Sr + IBr2

64.
Predict the product(s) of this reaction (don't worry about balancing):
C12H22O11 + O2 →
a)
CO + HO
b)
CO2
c)
CO2 + H2O
d)
H2O
65.
Predict the product(s) of this reaction (Don't worry about balancing) 
Pb(NO3)2  +  KI →
a)
PbK +  I NO3
b)
not possible
c)
PbI2  +  KNO3
d)
PbI  + KNO3
66.

Based on the activity series, which metal could X represent in the reaction below?

X + Ca (NO3)2 --> Ca + X (NO3)2

a)

Ba

b)

Fe

c)

Mg

d)

Zn

67.

Which metal is more reactive than calcium?

a)

magnesium

b)

potassium

c)

silver

d)

aluminum

68.
What  will be the result of the following: 
Br2 + NaF ->
a)
bromine will replace Na
b)
Na will replace Br
c)
Br will replace F
d)
no reaction will occur
69.
What  will be the result of the following: 
LiBr + Na ->
a)
Li will replace Na
b)
Na will replace Br
c)
Na will replace Li
d)
no reaction will occur
70.
Will silver react with magnesium chloride solution?
a)
yes
b)
no
71.
AB + CD →AD + CB
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
72.
Identify this type of reaction,
Cl2 + 2KI -->  I2 + 2KCl
a)
Synthesis
b)
Single displacement
c)
Double displacement
d)
Decomposition
73.
2 C5H5 + Fe --> Fe(C5H5)2 
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
74.
2 RbNO3 + BeF2 --> Be(NO3)2 + 2 RbF
a)
single displacement
b)
double displacment
c)
decomposition
d)
synthesis
75.
Which chemical reaction breaks down into 2 substances?
a)
Double displacement
b)
Single displacement
c)
Synthesis
d)
Decomposition
76.
Which of the following is an example of synthesis?
a)
Na + Br2 --> NaBr
b)
KClO3 --> KCl + O2
c)
HgO + Cl2-->HgCl + O2
d)
Cl2 + NaBr --> NaCl + Br2
77.
Which of the following is the general formula for a decomposition reaction?
a)
A + B  → AB
b)
AB → A + B
c)
AB + C → AC + B
d)
AB + CD → AC + BD
78.
2 AgNO3 + Cu --> Cu(NO3)2 + 2 Ag 
a)
single displacement
b)
double displacement
c)
decomposition
d)
synthesis
79.
A + BC →B + AC
a)
Single Replacement
b)
Decomposition
c)
Double Replacement
d)
Synthesis
80.
Which of the following describes a precipitate?
a)
a liquid forms when a block of metal is heated
b)
a solid forms when one liquid is poured into another
c)
a gas forms when a solid is placed in a liquid
d)
bubbles form when an acid is poured on a rock
81.

What class of reaction best describes the equation below: FeS + HCl --> H2S + FeCl2

a)

synthesis

b)

combustion

c)

single replacement

d)

double replacement

82.

Which of the following compounds is INSOLUBLE?

a)

magnesium phosphate

b)

magnesium sulfate

c)

magnesium iodide

d)

magnesium nitrate

e)

none of the above

83.

Zinc Hydroxide

a)

Soluble

b)

Insoluble

84.

Sodium Acetate

a)

soluble

b)

insoluble

85.

In the laboratory, a student mixes aqueous solutions of Nickel Sulfate and Sodium hydoxide. What will the precipitate be?

a)

Ni(OH)2

b)

Na2SO4

c)

SO2

d)

no precipitate will form

86.

Mixing Aqueous Iron (II) Nitrate and Aqueous Sodium Carbonate causes an orange precipitate to form. What is the chemical formula of the precipitate?

a)

Fe(NO3)2 (s)

b)

FeCO3 (s)

c)

NaNO3 (s)

d)

Na2(NO3)2 (s)

87.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?


Li2S + 2AgNO3 → 2LiNO3 + Ag2S

a)

Yes, and LiNO3 formed a precipitate.

b)

Yes, and Ag2S formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

88.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?


BaCl2 + Na2CO3 → BaCO3 + 2NaCl

a)

Yes, and BaCO3 formed a precipitate.

b)

Yes, and NaCl formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

89.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?


3BaCl2 + 2H3PO4 → Ba3(PO4)2 + 6HCl

a)

Yes, and Ba3(PO4)2 formed a precipitate.

b)

Yes, and HCl formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

90.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?


K2SO4 + MgF2 → 2KF + MgSO4

a)

Yes, and KF formed a precipitate.

b)

Yes, and MgSO4 formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

91.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?


2AlCl3 + 3BaSO4 → Al2(SO4)3 + 3BaCl2

a)

Yes, and Al2(SO4)3 formed a precipitate.

b)

Yes, and BaCl2 formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

92.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?


AlBr3 + H3PO4 → AlPO4 + 3HBr

a)

Yes, and AlPO4 formed a precipitate.

b)

Yes, and HBr formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

93.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?

NaCl  +   KBr    →\rightarrow     KCl    +  NaBr

a)

Yes, and KCl formed a precipitate.

b)

Yes, and NaBr formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

94.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?

K2CO3 + BaCl2 → BACO3+ 2KClK_2CO_3\ +\ BaCl_2\ \rightarrow\ BACO_3+\ 2KCl  

a)

Yes, and  BaCO3BaCO_3  formed a precipitate.

b)

Yes, and  KClKCl   formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

95.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?     
Pb(NO3)2 + Na2CrO4 → NaNO3 + PbCrO4Pb\left(NO_3\right)_2\ +\ Na_2CrO_4\ \rightarrow\ NaNO_3\ +\ PbCrO_4  

a)

Yes, and  NaNO3NaNO_3  formed a precipitate.

b)

Yes, and  PbCrO4PbCrO_4   formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

96.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?     
K3PO4+Ca(NO3)2 → KNO3+Ca3(PO4)2K_3PO_4+Ca(NO_3)_2\ \rightarrow\ KNO_3+Ca_3(PO_4)_2  

a)

Yes, and  KNO3KNO_3  formed a precipitate.

b)

Yes, and  Ca3(PO4)2Ca_3\left(PO_4\right)_2   formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

97.

Use the solubility chart to determine if this is a chemical reaction and if so, what formed a precipitate?     
K3PO4+MgBr2→Mg2(PO4)3+KBrK_3PO_4+MgBr_2\rightarrow Mg_2(PO_4)_3+KBr  

a)

Yes, and  Mg2(PO4)3Mg_2\left(PO_4\right)_3  formed a precipitate.

b)

Yes, and  KBrKBr   formed a precipitate.

c)

No, it is not a chemical reaction because no precipitate formed.

98.

Will it react?

Mg (s) + Fe(NO3)2

a)

yes

b)

no

99.
Will it react?
Cu (s) + Fe(NO3)2
a)
yes
b)
no
100.
Will it react?
Cu (s) + Ag(NO3)
a)
yes
b)
no
101.
Will it react?
Fe (s) + Pb(NO3)2
a)
yes
b)
no
102.

Will it react?

Cu + FeSO4

a)

yes

b)

no

103.

Will it react?

Li + Pb(NO3)2

a)

yes

b)

no

104.

Will it react?

I2 + CaBr2

a)

yes

b)

no

105.

Will it react?

Cl2 + NaI

a)

yes

b)

no

106.

Will it react?

2 Na + CuBr2

a)

yes

b)

no

107.

Will it react?

Cu + 2NaBr

a)

yes

b)

no

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