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Acc Chem Unit 5 Types of Reactions

Total questions: 44

Worksheet time: 1hrs 7mins

Name
Class
Date
1.
CxHy +O2 --> H2O + CO2
a)
Decomposition
b)
Double replacement
c)
Combustion
d)
Single Replacement
2.
KOH + H3PO4 --> K3PO4 + H2O
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
3.
What is the left part of a chemical equation called?
H2 + O → H2O
a)
Reactants
b)
Products 
c)
Yields 
d)
Chemical Equation 
4.

Combustion reactions will always involve

a)

Oxygen and a solid

b)

Liquid nitrogen and heat

c)

Oxygen and heat/energy

d)

CO and H2O

5.

What is the oxidation number of chlorine in HClO?

a)

0

b)

-1

c)

+1

d)

+5

6.

What is the oxidation number of nitrogen in N2?

a)

-3

b)

0

c)

+4

d)

-1

7.

Which of the following represents oxidation?

a)

C → CH4

b)

Fe3+ → Fe2+

c)

Cl2 → 2Cl-

d)

Zn → ZnO

8.

In the reaction Zn + 2HCl --> ZnCl2 + H2

which element, if any, is oxidized?

a)

Zinc

b)

Hydrogen

c)

Chlorine

d)

None

9.
Which statement is true:
Mg → Mg2+ + 2e–
a)
Mg gains 2 electrons
b)
Mg2+ loses 2 electrons
c)
Mg loses 1 electron
d)
Mg loses 2 electrons
10.
If in a reaction, copper is reduced; its number of electrons has:
a)
Increased
b)
Decreased
c)
Remained Constant
d)
Varies Randomly
11.
KBr
a)
Soluble
b)
Insoluble
12.
Silver Iodide
a)
Soluble 
b)
Insoluble 
13.

Na3PO4 (s) is a soluble compound. When one mole of this compound dissociates in water, it forms -

a)

1 mole of Na+ (aq) and 1 mole of PO43- (aq)

b)

3 moles of Na+ (aq) and 1 mole of PO43- (aq)

c)

1 mole of Na+ (aq), 1 mole of P3-(aq), and 4 moles of O2- (aq)

d)

3 moles of Na+ (aq), 1 mole of P3- (aq), and 4 moles of O2- (aq)

14.

Mixing Fe(NO3)2 (aq) and Na2CO3 (aq) 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)

15.

Predict the product(s) of this reaction (Don't worry about balancing the equation)

Pb(NO3)2 + KI →

a)

PbK(s) + INO3(aq)

b)

No Reaction

c)

PbI2(s) + KNO3(aq)

d)

PbI2(aq) + KNO3(s)

16.
Which is the correct net ionic equation for the reaction of AgNO3 and CaCl2?
a)
Ca2+(aq) +  2Cl- (aq) → CaCl(s)
b)
Ag+(aq)  +  Cl- (aq) → AgCl(s)
c)
Ag +  Cl  →  AgCl
d)
Ag+  +  Ca2+   →Ag2Ca (s)
17.
Which of the following does NOT form a precipitate?
a)
Pb(NO3)2(aq) + 2KI(aq) →
b)
Sr(NO3)2 (aq) + K2SO4(aq) →
c)
AgNO3(aq) + Na2S(aq) →
d)
 Pb(NO3)2(aq) + AgNO3(aq) →
18.
What are the spectator ions in the reaction of sodium chloride with silver nitrate?
a)
silver and nitrate
b)
sodium and chloride
c)
sodium and nitrate
d)
silver and chloride
19.
Which of these results in formation of a precipitate?
a)
BaNO3(aq)  +  NaCl(aq)→
b)
KNO3(aq)  +  LiOH(aq)→
c)
Zn(NO3)2(aq)  +  NaOH(aq)→
d)
NaNO3(aq)  +  Ba(OH)2(aq)→
20.
What is Solubility? 
a)
What is dissolved 
b)
What does the dissolving
c)
A measure of how much solute can dissolve in solvent 
d)
a charged ion 
21.
Which pair could be spectator ions?
a)
NH4+ and Cl-
b)
Ca+2 and OH-
c)
Ag+ and Br-
d)
Sr+2 and CO3 -2
22.

As water is added to a 0.10 M NaCl aqueous solution, the conductivity of the resulting solution

a)

decreases because the concentration of ions decreases

b)

decreases, but the concentration of ions remains the same

c)

increases because the concentration of ions decreases

d)

increases, but the concentration of ions remains the same

23.

A solid substance was tested in the laboratory. The test results are listed below.

• dissolves in water

• is an electrolyte

• melts at a high temperature

Based on these results, the solid substance could be

a)

Cu

b)

CuBr2

c)

C

d)

C6H12O6

24.

Based on Reference Table F, which of these salts is the best electrolyte?

a)

sodium nitrate

b)

magnesium carbonate

c)

silver chloride

d)

barium sulfate

25.

A substance that conducts an electrical current when dissolved in water is called

a)

catalyst

b)

metalloid

c)

electrolyte

d)

nonelectrolyte

26.

What happens when BaF2(s) is dissolved in water?

a)

F- ions are attracted to the oxygen atoms of the water

b)

F- ions are attracted to the hydrogen atoms of the water

c)

Ba2+ ions are attracted to the hydrogen atoms of the water

d)

No attractions are involved, the crystal just falls apart

27.

Which of the following is not an electrolyte?

a)

KBr

b)

LiOH

c)

RbNO3

d)

CH4

28.
A neutralization reaction will (almost) always produce...
a)
water & salt
b)
water
c)
salt
d)
water & carbon
29.
Identify the salt in the following equation:
Zn(OH)2 + HNO3   ---> H2O  + Zn(NO3)2
a)
Zn(OH)2
b)
HNO3
c)
H2O
d)
Zn(NO3)2
30.
What type of reaction is displayed below?
HCl + NaOH → NaCl + H2O
a)
Neutralization
b)
Combustion
c)
Double Replacement
d)
Decomposition
31.

Hydrogen gas and nitrogen gas react in a synthesis reaction to form ammonia (NH3). If the 'before' box represents the reactants, which box correctly represents the contents after the reaction is complete? (Hint: first write a balanced eqn.)

a)

A

b)

B

c)

C

d)

D

e)

E

32.

The reaction represented in the boxes is the combustion of methane (CH4) in oxygen. Red = oxygen, black = carbon and white = hydrogen. Write a balanced equation. What is the limiting reactant in the picture shown?

a)

methane (CH4)

b)

oxygen (O2)

c)

carbon dioxide (CO2)

d)

water (H2O)

33.
Which substance is MOST soluble at 0 ºC?
a)
KI
b)
NaNO3
c)
NaCl
d)
Ce2(SO4)3
34.
Which solute does not increase in solubility as temperature rises?
a)
NH3
b)
NaNO3
c)
KNO3
d)
NaCl
35.
When 20 grams of potassium chlorate, KClO3, is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
36.
When 50 grams of KCl is dissolved in 100 grams of water at 50 ºC, the solution can be correctly described as:
a)
supersaturated
b)
unsaturated
c)
saturated
37.
When two liquids mix, they are said to be....
a)
insoluble
b)
miscible
c)
soluble
d)
immiscible
38.
Find the molarity of 186.55 g of sucrose, C12H22O11 (MM = 342) in 250 mL of water.
a)
2.18 M
b)
0.746 M
c)
1.18 M
d)
0.545 M
39.
How many grams of AgNO3 (MM = 169.87) are needed to prepare 0.125M solution in 250 mL of water? 
a)
.03g
b)
0.5g
c)
5.3g
d)
84.9g
40.
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250 mL?
a)
15.9 M
b)
0.636 M
c)
0.642 M
d)
1.59 M
41.
How many mL of 10.8M HCl are required to make 100.0 mL of 3.00M acid?
a)
27.8 mL
b)
27.78 mL
c)
2.8 mL
d)
278 mL
42.
What volume of 1.50 M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?
a)
150. mL
b)
151 mL
c)
1.00 L
d)
100. mL
43.

Which of the following is the correct formula for calculating molarity?

a)

moles/liters of solution

b)

moles/kg of solvent

c)

# particles/Avogadro's #

d)

theoretical yield/actual yield

44.

Which of the following will produce crystals if cooled or disturbed?

a)

unsaturated solution

b)

saturated solution

c)

supersaturated solution

d)

all of the above

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