Ch 11 Test

1.

1 point

What is the sum of the coefficients when the following is balanced?
AlBr3 + K2SO4 --> KBr + Al2(SO4)3

5

11

8

12

2.

1 point

In a combustion reaction, one of the reactants is

nitrogen

a metal

oxygen

hydrogen

3.

1 point

The sum of the coefficients when the following is balanced is?

copper + sulfuric acid yields copper II sulfate, water and sulfur dioxide

9

7

11

5

4.

1 point

Predict the products for the following reaction:
calcium acetate + sodium carbonate —>

carbonate calcium + acetate sodium

calcium sodium + carbonate acetate

sodium calcide + calcium acetic

calcium carbonate + sodium acetate

5.

1 point

If butane (C4H10) undergoes complete combustion:

10 O2 is one reactant

9 O2 is one reactant

8 CO is one product

8 CO2 is one product

6.

1 point

When balanced, the sum of the coefficients for the following is?
H2S + HNO3 --> S + NO + H2O

5

14

17

8

7.

1 point

A chemical formula written above the yield sign indicates:

that a gas is formed

that heat must be supplied

that the substance is used as a catalyst

a reversible reaction

8.

1 point

In order to predict whether or not a single replacement reaction takes place, you need to consult a chart that shows the _____

ionic charges of representative elements

common polyatomic ions

activity series of metals

periodic table

9.

1 point

When H2SO4 and NaOH react by double replacement:

2 H2O are produced

2 H2SO4 are required

1 NaOH is required

Na2SO4 is prodcued

10.

1 point

When the following is balanced, the sum of the coefficients is?
Ba + HCl --> BaCl2 + H2

4

8

6

5

11.

1 point

The spectatory ions in the reaction ZnCl2 + LiOH --> are?

Zn and Cl

Zn and OH

Li and Cl

Li and OH

12.

1 point

A double replacement reaction takes place when K2SO4 reacts with Pb(NO3)2. You would expect one of the products of this reaction to be:

K2S

CNO3

NaPb

PbSO4

13.

1 point

The reaction, Mg + HCl --> MgCl2 + H2, is an example of:

double replacement reaction

combination reaction

decompostion reaction

single replacement reaction

14.

1 point

In the chemical equation H2O2 --> H2O + O2, the O2 is a

reactant

solid

catalyst

product

15.

1 point

When the equation Mg + HCl --> MgCl2 + H2 is balanced, what is the coefficient for HCl?

3

4

1

2

16.

1 point

When the equation Fe + O2 --> Fe2O3 is balanced, what is the sum of all the coefficients added together?

8

7

6

9

17.

1 point

Chemical reactions ______.

produce new substances

create and destroy atoms

occur only in living organisms

only occur outside living organisms

18.

1 point

What are the missing coefficients for the skeleton equation below?
Cr + Fe(NO3)2 --> Fe + Cr(NO3)3

2,3,3,2

1,3,3,1

2,3,2,3

4,6,6,2

19.

1 point

Based on the activity series, the reaction that is most likely to occur from the following is:

Zn + HNO3 -->

Cu + HCl-->

Ag + Cu(NO3)2 -->

Pb + Na2SO4

20.

1 point

Double replacement reactions are generally driven by the formation of:

all of the above

a precipitate

water

a gaseous product

21.

1 point

In order for the reaction Cu + 2 AgNO3 --> Cu(NO3)2 + 2 Ag to occur, which of the following must be true?

Ag must be above Cu in the activity series

Cu must be above Ag in the activity series

Cu must be above H in the activity series

Ag must be above H in the activity series

22.

1 point

The complete combustion of octane (C8H18) would:

require 25 O2

produce 18 H2O

produce 16 CO2

all of the above

23.

1 point

In a double replacement reaction:

one of the reactants is often water

energy in the form of heat or light is always produced

the reactants are usally a metal and a nonmetal

the reactants are two ionic compounds in aqueous solution

24.

1 point

Chemical equations must be balanced to satisfy

the law of definite proportions

the law of multiple proportions

the law of conservation of mass

Avogadro's Principle

25.

1 point

Predict the products for the following reaction:
potassium carbonate —>

potasssium carbide + oxygen

potassium oxide + carbon dioxide

potassium + carbon + oxygen

potassium oxide + carbon

26.

1 point

When balanced, the sum of all the coefficients for the following is?
AlBr3 + Cl2 --> AlCl3 + Br2

8

4

6

10