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Identifying and Balancing Chemical Reactions

Total questions: 23

Worksheet time: 43mins

Name
Class
Date
1.
_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
2.
_AgNO3 + _Cu →_Cu(NO3)2 + _Ag
a)
2 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 1 Ag
b)
2 AgNO3 + 1 Cu → 1 Cu(NO3)2 + 2 Ag
c)
1 AgNO3 + 2 Cu → 2 Cu(NO3)2 + 1 Ag
d)
3 AgNO3 + 2 Cu → 3 Cu(NO3)2 + 2 Ag
3.
_BaS + _PtF2 → _BaF2 + _PtS
a)
1 BaS + 1 PtF2 → 1 BaF2 + 1 PtS
b)
4 BaS + 2 PtF2 → 1 BaF2 +  1 PtS
c)
1 BaS + 2 PtF2→ 2 BaF2 +  2 PtS
d)
1 BaS + 3 PtF2 →1 BaF2 +  2 PtS
4.
_AlBr3 + _K2SO4 → _KBr + _Al2(SO4)3
a)
6 AlBr3 + 1 K2SO4 → 6 KBr + 1 Al2(SO4)3
b)
2 AlBr3 + 3 K2SO4 → 6 KBr + 1 Al2(SO4)3
c)
1 AlBr3 + 1 K2SO4 → 2 KBr + 3 Al2(SO4)3
d)
2 AlBr3 + 3 K2SO4 → 1 KBr + 2 Al2(SO4)3
5.
_Al + _HCl →_H2 + _AlCl3
a)
2 Al + 2 HCl → 2 H2 + 6 AlCl3
b)
3 Al + 3 HCl → 6 H2 + 2 AlCl3
c)
1 Al + 1 HCl → 3 H2 + 1 AlCl3
d)
2 Al + 6 HCl → 3 H2 + 2 AlCl3
6.
_K + _Cl2 →_KCl
a)
2 K + 16 Cl2 → 8 KCl
b)
2 K + 1 Cl2 → 2 KCl
c)
3 K + 4 Cl2 → 3 KCl
d)
1 K + 1 Cl2 →1 KCl
7.

Reactions that have hydrocarbons (CH4) and oxygen as reactants and carbon dioxide and water as products

a)

Conservation of Mass

b)

combustion

c)

double replacement

d)

decomposition

8.

The total mass of the reactants must equal the total mass of products. Matter is never created or destroyed

a)

Conservation of Mass

b)

Pascal's Principle

c)

catalyst

d)

inhibitor

9.

When two or more substances combine to form a more complex substance

a)

compound

b)

double replacement

c)

synthesis

d)

catalyst

10.

Breaks down compounds into simpler products. Starts with one reactant and ends with 2 or more products

a)

decomposition

b)

synthesis

c)

combustion

d)

single replacement

11.

One compound and a free element that recombine to yield a new compound and a new free element

a)

combustion

b)

synthesis

c)

decomposition

d)

single replacement

12.

Starts with two compounds as reactants, that recombine to form two new compounds as products

a)

compound

b)

catalyst

c)

combustion

d)

double replacement

13.

Which type of chemical reaction is this:

Mg + O2 ------- MgO

a)

synthesis

b)

decomposition

c)

combustion

d)

single replacement

14.

Which type of chemical reaction is this:

HgO ------- Hg + O

a)

synthesis

b)

double replacement

c)

combustion

d)

decomposition

15.

Which type of chemical reaction is this:

C2H4 + 3O2 -------- 2CO2 + 2H2O

a)

double replacement

b)

decomposition

c)

combustion

d)

synthesis

16.

Which type of chemical reaction is this:

FeCl2 + K2S --------- FeS + 2KCl

a)

synthesis

b)

double replacement

c)

combustion

d)

single replacement

17.

Which type of chemical reaction is this:

3Fe + 4H2O -------- Fe3O4 + 4H2

a)

synthesis

b)

single replacement

c)

decomposition

d)

double replacement

18.
The right side of the equation below is called the
a)
products
b)
reactants
19.
a new substance formed in a chemical reaction
a)
reactants
b)
products
20.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

21.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

22.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

23.

Identify the type of chemical reaction

a)

Synthesis

b)

Decomposition

c)

Single replacement

d)

Double replacement

e)

Combustion

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