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CH19 Chemical Reactions

Total questions: 25

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

two compounds in a reaction swap elements.

a)

synthesis reaction

b)

decomposition reaction

c)

single replacement

d)

double replacement

2.

reaction seen...

a)

synthesis

b)

decomposition

c)

single replacement

d)

double repleacement

3.

reaction seen

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

4.

reaction seen

a)

synthesis

b)

single replacement

c)

decomposition

d)

double replacement

5.

reaction seen

a)

synthesis

b)

single replacement

c)

double replacement

d)

decomposition

6.

____ Mg + ____ Cl2 => ____ MgCl2

balance (choose the correct balanced equation)

a)

2Mg + 3Cl2 => 4MgCl2

b)

Mg + Cl2 => MgCl2

c)

3Mg + 2Cl2 => 3MgCl2

d)

3Mg + 2Cl2 => 4MgCl2

7.

__CH3CH2CH2CH3 + __O2 =>__CO2 + __H2O

balance (choose the correct balanced equation)

a)

2 CH3CH2CH2CH3 + 13 O2 => 8 CO2 + 10 H2O

b)

CH3CH2CH2CH3 + O2 => CO2 + H2O

c)

2 CH3CH2CH2CH3 + 12O2 => 7CO2 + 9H2O

d)

2 CH3CH2CH2CH3 + 13O2 => 6CO2 + 9H2O

8.

number of electrons that an atom would gain or lose to become stable.

a)

chemical formula

b)

oxidation number

c)

reactant number

d)

product number

9.

type of reaction that produces H2O and CO2

a)

synthesis

b)

decomposition

c)

combustion

d)

double replacement

10.

compounds or elements found on the left of the arrow and are present BEFORE the reaction occurs.

a)

products

b)

reactants

c)

initial compounds

d)

final compounds

11.

this type of reaction carries this standard form XY + Z ==> ZY + X.

a)

synthesis

b)

decomposition

c)

single replacement

d)

double replacement

12.

Find the ON of each element in the following compound:


H2S

a)

H: +1 and S: -1

b)

H: +1 and S: -2

c)

H: -1 and S: +1

d)

H: -1 and S: +2

13.

Find the ON of each element in the following compound:


SiO2

a)

Si: +4 and O: -2

b)

Si: +4 and O: -4

c)

Si: -4 and O: +4

d)

Si: -4 and O: +2

14.

Find the ON of each element in the following compound:


S8

a)

S: 0

b)

S: -2

c)

S: +2

d)

S: -16

15.

_____ H2SO4 + _____ NaOH ==> _____ H2O + _____ Na2SO4

choose the correctly balanced equation

a)

H2SO4 + NaOH ==> H2O + Na2SO4

b)

2H2SO4 + NaOH ==> 2H2O + Na2SO4

c)

H2SO4 + 2NaOH ==> 2H2O + Na2SO4

d)

2H2SO4 + NaOH ==> H2O + 2Na2SO4

16.

a reaction that results in light or heat as one of the by products (select all that apply).

a)

combustion

b)

decompostion

c)

exothermic

d)

endothermic

17.

An equation where the number of atoms of EACH element on the reactant’s side is equal to the number of atoms of EACH element on the product side.

a)

synthesis equation

b)

balanced equation

c)

exothermic equation

d)

endothermic equation

18.

these ions consist of two or more covalently bonded atoms that act as a single particle.

a)

cations

b)

anions

c)

polyatomic ions

d)

binary ions

19.

in this reaction thermal energy tends to be absorbed or take inside.

a)

acid-base reaction

b)

redox reaction

c)

exothermic reaction

d)

endothermic reaction

20.

this shows the relative proportions found in a chemical formula (similar to reducing fractions in math).

a)

balanced formula

b)

chemical formula

c)

empirical formula

d)

oxidation formula

21.

find the empirical formula of the following:


C4H10

a)

C4H10

b)

C2H5

c)

CH

d)

C1H1

22.

find the empirical formula of the following:

C2H6O

a)

CHO

b)

C2H3O

c)

C1H1O1

d)

C2H6O

23.

_____FeS2 + _____O2 ==> _____Fe2O3 +_____SO2

choose the correctly balanced equation

a)

FeS2 +O2 ==> Fe2O3 +SO2

b)

2FeS2 + 6O2 ==>2Fe2O3 +4SO2

c)

4FeS2 + 5O2 ==> 2Fe2O3 +4SO2

d)

4FeS2 + 11O2 ==> 2Fe2O3 +8SO2

24.

describes what happens during a chemical reaction.

a)

chemical formula

b)

chemical equation

c)

chemical symbol

d)

empirical formula

25.

shorthand way to tell the identities and amounts of elements in a compound.

a)

chemical formula

b)

chemical symbol

c)

empirical formula

d)

chemical equation