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Summative Test on Chemical Equations

Total questions: 45

Worksheet time: 2hrs 30mins

Name
Class
Date
1.

What state of matter is this substance?

a)

solid

b)

liquid

c)

gas

d)

aqueous

2.

In what state is this substance?

a)

solid precipitate

b)

dissolved in water

c)

released as a gas

d)

liquid

3.

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

a)

1

b)

2

c)

3

d)

4

4.

What are the blue numbers called?

a)

oxidation numbers

b)

subscripts

c)

group numbers

d)

product numbers

5.

How many atoms of nitrogen are present in this molecule?

a)

1

b)

2

c)

3

d)

4

6.

Which compound is formed as a precipitate in this reaction?

a)

Pb(NO3)2

b)

KI

c)

PbI2

d)

KNO3

7.

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

a)

Reactant

b)

Product

8.
What are the smaller numbers that you CANNOT change in a chemical equation? 
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
9.
Pb(NO3)2  +  KI --> PbI2 + KNO3
What type of reaction is this? 
a)
Synthesis 
b)
Decomposition 
c)
Single Replacement
d)
Double Replacement 
10.

__Na + O2 -----> __Na2O

Type of reaction?

Balance it too. :)

a)

Synthesis, 2Na , 1O2 + NaO2

b)

Decomposition, 4Na + 2O2 -------> 2Na2O

c)

Synthesis, 4Na + 1O2 ------> 2Na2O

d)

Decomposition, 2Na + 4O --------> 4NaO

11.

What type of reaction is this?

__H2O2 ----> __H2O + O2

a)

Synthesis

b)

Decomposition

c)

Single Replacement

d)

Combustion

12.
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 
13.

Balance this chemical reaction......?

__H2O2 ----> __H2O + O2

a)

2H2O2 ----> 2H2O + O2

b)

1H2O2 --------> 2H2O + O2

c)

2H2O2 -------> 1H2O + 2O

d)

H2O2 ---------> 2H2O + O

14.
How many oxygens are in Al₂(SO₄)₃?
a)
4
b)
12
c)
7
d)
24
15.

P4 + O2 ---> P2O3

a)

3 P4+1 O2 ---> 2 P2O3

b)

1 P4+1 O2 ---> 2 P2O3

c)

1 P4+ 3 O2 ---> 2 P2O3

d)

1 P4+ 2 O2 ---> 3 P2O3

16.
Na3PO4 +  KOH ---> NaOH +  K3PO4
a)
1 Na3PO4+3 KOH
--->
3 NaOH +  1 K3PO4
b)
2 Na3PO4+2 KOH
--->
3 NaOH +  1 K3PO4
c)
1 Na3PO4+2 KOH
--->
2 NaOH +  1 K3PO4
d)
3 Na3PO4+3 KOH
--->
3 NaOH +  1 K3PO4
17.
Which of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O3
a)
4Fe + 3O2 -> 2Fe2O3
b)
2 Fe + 3O2 -> Fe2O6
c)
4 Fe + O6 -> 2Fe2O3
d)
None of the options are correctly balanced.
18.
Which chemical reaction breaks down into 2 substances?
a)
Double Replacement
b)
Single Replacement
c)
Synthesis
d)
Decomposition
19.
Which chemical reaction switches 2 elements?
a)
Double Replacement
b)
Single Replacement
c)
Combustion
d)
Decomposition
20.

Which chemical reaction takes place when 2 substances react to form a single product?

a)

Decomposition

b)

Double Replacement

c)

Single Replacement

d)

Synthesis

21.

What are the products of this reaction? Cu+2

Cu+ AgNO3-->

a)

Cu(NO3)2+Ag

b)

CuNO3 + Ag

c)

CuAg+NO3

d)

Cu+ AgNO3

22.

Write a Balanced Equation for this reaction:

C2H4 + O2 -->

a)

C2O2 + H4

b)

CO2 + HOH

c)

CO + H

d)

2 CO2 + 2H2O

23.

Predict the products for the this reaction:

K + HCl -->

a)

KCl + H2

b)

KHCl

c)

KH + Cl2

d)

KCl + H

24.
If an element is diatomic it should have a subscript of___
a)
2, always
b)
2, only when it is by itself
c)
it shouldn't have a subscript, it should have a coefficent
25.
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
26.
What is the product when rubidium and oxygen gas react?
a)
RbO2
b)
Rb2O
c)
RbO
d)
Rb2O2
27.
in a reaction, aqueous barium chloride reacts with aqueous potassium carbonate to produce solid barium carbonate and aqueous potassium chloride. what is the correct balanced equation.
a)
Ba2Cl(aq) + KCO3(aq) --> BaCO3(s) + KCl(aq)
b)
BaCl2(aq) + K2CO3(aq) --> BaCO3(s) + 2KCl(aq)
c)
BaCl(aq) + K2CO3(aq) --> BaCO3(s) + K2Cl(aq)
d)
Ba2Cl2(aq) + KCO3(aq) --> Ba2CO3(s) + KCl2(aq)
28.

Predict the products for this equation.

(Zn with a charge of +2)

Zn + H2SO4 -->

a)

Zn(SO4)2 + H

b)

ZnSO4 + H2

c)

ZnSO4 + H4

29.

Complete the balanced equation for this Double Replacement reaction.

3 NaOH + Fe(NO3)3 -->

a)

NaFe + OH(NO3)3

b)

2NaNO3

c)

3 NaNO3 + Fe(OH)3

30.

What is the charge of Iron in this compound. (Hint: think criss cross method):

Fe3(PO4)2

a)

+3

b)

+2

c)

+1

31.

What are the products of this Single Replacement reaction?

Zn(s) + H2SO4(aq) -->

a)

ZnH2SO4

b)

ZnSO4 + H2

c)

No reaction

32.

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

a)

Activity series

b)

Solubility Chart

c)

Periodic Table

33.

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

a)

Precipitate

b)

Rocks

c)

Aqueous

34.

The symbol for a substance dissolved in solution is ______

a)

(s)

b)

(l)

c)

(aq)

35.

Based on the activity series, will this reaction occur?

Zn (s) + HCl (aq) →

a)

Yes

b)

No

36.
Based on the activity series, will this reaction occur?
Au (s) + HCl (l) →
a)
Yes
b)
No
37.

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

38.

According to the activity series, which of the following single replacement reactions can occur?

a)

Ca + Al2(SO4)3

b)

Fe + NaOH

c)

Ni + MgSO4

d)

Al + KOH

39.

Complete and balance the following reaction:


C3H8 + O2 -->

a)

C3H8 + 5 O2 --> 3 CO2 + 4 H2O

b)

C3H8 + 3 O2 --> 3CO2 + 4 H2

c)

C3H8 + O2 --> CO2H2O

d)

C3H8 + 2 O2 --> 4 H2O + 3 C

40.

Complete and balance this equation


Na2CO3 + AlCl3 -->

a)

3 Na2CO3 + 2 AlCl3 --> 2 Na3Al + 3 Cl2CO3

b)

Na2CO3 + AlCl3 --> Na2Cl3 + AlCO3

c)

Na2CO3 + AlCl3 --> NaCl + AlCO3

d)

3 Na2CO3 + 2 AlCl3 --> 6 NaCl + Al2(CO3)3

41.

What kind of reaction is this:

2C3H7OH +9O2 -> 6CO2 + 8H2O

a)

Double Replacement

b)

Combustion

c)

Single Replacement

d)

Decomposition

42.

Determine the coefficients to make the following equation balanced?

__N2 + __O2--> __NO

a)

1, 1, 1

b)

1, 1, 2

c)

2, 2, 2

d)

1, 2, 2

43.

Determine the coefficients to balance the chemical equation.

___Al + ___O2--> ___Al2O3

a)

4, 1, 2

b)

4, 3, 4

c)

3, 4, 1

d)

4, 3, 2

44.

If a triangle is placed above the yield sign in a chemical equation, it would represent

a)

a warning that it is a dangerous reaction

b)

A chemical change is taking place

c)

Heat was added to the reaction

d)

means the reaction will not take place

45.

If a symbol of an element or formula of a compound is placed above the yield sign in a chemical equation it would represent

a)

Another reactant

b)

Another product

c)

Heat was added

d)

A catalyst was added

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