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STEHN Reaction Types

Total questions: 69

Worksheet time: 1hrs 25mins

Name
Class
Date
1.

Based on the activity series, what are the predicted products of this reaction?

Br2 (l) + KI (aq) →

a)

KBr + I2

b)

KBr + I

c)

KBr2 + I

d)

No Reaction

2.
What do we look at to determine if an element is strong enough to replace another element in a single replacement reaction?
a)
Solubility Rules 
b)
Ionic Charges
c)
It must be insoluble!
d)
Activity Series
3.

Which metal is the most active

a)

Cu

b)

Ag

c)

Na

d)

Li

4.

Which reaction occurs

a)

Ag + KNO3 ------> K + AgNO3

b)

K + AgNO3 ------> Ag + KNO3

5.

Which reaction occurs

a)

Cl2 (g) + 2 KI (aq) -------> 2 KCl (aq) + I2 (g)

b)

2 KCl (aq) + I2 (g) -------> Cl2 (g) + 2 KI (aq)

6.

Select the metal that is more active than H2

a)

Cu

b)

Ag

c)

Au

d)

Fe

7.

If you wear gold jewelry in the shower does a chemical reaction take place?

a)

No, gold (Au) is less active than the hydrogen in water

b)

No, gold (Au) is more active than the hydrogen in water

c)

Yes, but you can't physically see the reaction happen

d)

Yes, gold (Au) is more active than the hydrogen in water

8.

What are the seven diatomic elements?

a)

H2, Cl2, Br2, O2, N2, I2, F2

b)

H2, Cl2, I2, F2, Hg2, Br2, Fe2

c)

H2, Cu2, Ni2, B2, O2, I2, Fe2

9.

What are diatomic elements?

a)

Elements that form two-atom molecules when not combined in a compound.

b)

Two elements that combine with one atom from each element.

c)

Elements that are always in pairs no matter what.

10.

Is Fe2 a diatomic element?

a)

Yes

b)

No

11.

Is K2 a diatomic element?

a)

Yes

b)

No

12.

What number do the diatomic elements form on the periodic table?

a)

7

b)

1

c)

2

13.
In Cl2, the 2 is known as
a)
the subscript.
b)
the coefficient.
c)
the molecular mass.
d)
the number of protons.
14.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
d)
Left side is balanced
15.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
16.
Which side of a chemical equation is the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
17.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
18.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
19.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
20.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
21.
The blue numbers in the image below represent ________
a)
Charges
b)
coefficients
c)
subscripts
d)
none of the answers are correct
22.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
23.
What is a precipitate?
a)
A solid formed from a single replacement reaction
b)
An aqueous compound formed from single replacement reaction 
c)
An aqueous compound formed from double replacement reaction
d)
A solid formed from a double replacement reaction
24.

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)

25.

Predict the products of the following equation.

MgCl2 + AgNO3 ---->

a)

AgCl(s) + Mg(NO3)2(aq)

b)

No Reaction

c)

AgCl(aq) + Mg(NO3)2(s)

d)

AgCl(s) + MgNO3(aq)

26.

Complete the following reaction:

HCl + Mg(OH)2 -->

a)

MgCl2 + H2O

b)

Mg +H2O

c)

MgCl2 + H2

d)

MgCl2 + H2O + CO2

27.

Predict the products of this DR reaction: NaCl + CaO ----->

a)

Na2O + CaCl2

b)

NaCa + OCl2

c)

This reaction will not occur

d)

NaO + CaCl

28.

Double replacements reactions have to be checked on the metal activity series to see if they will occur.

a)

True

b)

False

29.

Predict the products of this reaction: Ag2S + CuCl2--->

a)

This reaction will not occur.

b)

AgCl + CuS

c)

Ag2Cl2 + CuS

d)

AgCu + SCl2

30.

Without balancing the final equation, predict the products for the synthesis reaction:  Li + Cl2 →Li\ +\ Cl_2\ \rightarrow  ?

a)

 LiCl2LiCl_2  

b)

 LiClLiCl_{ }  

c)

 Li2Cl2Li_2Cl_2  

d)

 Li2ClLi_2Cl_{ }  

31.

Without balancing the final equation, predict the products for the synthesis reaction: Mg + Br2 →Mg\ +\ Br_2\ \rightarrow ?

a)

 MgBrMgBr  

b)

 MgBr2MgBr_2  

c)

 Mg2BrMg_2Br  

d)

 Mg2Br2Mg_2Br_2  

32.

What is the final balanced equation for: Li + P4 → ?Li\ +\ P_4\ \rightarrow\ ?   

a)

 Li + P4 → LiP4Li\ +\ P_4\ \rightarrow\ LiP_4  

b)

 4 Li + 3 P4 → 4 LiP34\ Li\ +\ 3\ P_4\ \rightarrow\ 4\ LiP_3  

c)

 4 Li + P4 → 4 LiP4\ Li\ +\ P_4\ \rightarrow\ 4\ LiP_{ }  

d)

 12 Li + P4 → 4 Li3P12\ Li\ +\ P_4\ \rightarrow\ 4\ Li_3P  

33.
A decomposition reaction can be represented as _____________________.
a)
AB  → A + B
b)
A + B → AB
c)
AB + CD → AC + BD
d)
A + BC → B + AC
34.
A chemical change in which two or more substances react to form a new substance is a ____________________________.
a)
decomposition reaction
b)
synthesis reaction
c)
double displacement reaction
d)
combustion reaction
35.
A synthesis reaction can be represented as ________________________.
a)
AB + CD → AC + BD
b)
AB → A + B
c)
A + B → AB
d)
A + BC → B + AC
36.
What is decomposition?
a)
putting substances together
b)
breaking substances apart
c)
element replacing another element in a compoud
d)
burning of a subtance
37.
How many outs do you need to get to get out of an inning 
a)
4
b)
2
c)
3
d)
10
38.

who is the best team in baseball

a)

Yankees

b)

Mets

c)

Dodger

d)

Cubs

39.
Measure of the amount of matter 
a)
mass
b)
volume
c)
weight
d)
density
40.
Anything that has mass & takes up space
a)
gravity
b)
force
c)
matter
d)
volume
41.

In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B have?

a)

4g

b)

5g

c)

9g

d)

14g

42.
If reaction starts with 20g of reactants it should produce 
a)
a total of 40g of products
b)
a total of 10g of products
c)
a total of 80 g of products
d)
a total of 20g of products
43.
In the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?
a)
17g
b)
2g
c)
7g
d)
None of the above
44.

When a log is burned, what happens to the wood?

a)

The mass stays the same, but becomes smoke and ash.

b)

It disappears.

c)

The mass changes as it goes away.

d)

Nothing. You're imagining things.

45.
Matter can not be created nor destroyed: it can only be
a)
Destroyed a little bit
b)
Invisible
c)
Transformed, changed
d)
None of the above
46.
In a synthesis reaction
a)
A compound breaks apart into two or more compounds
b)
Two or more compounds make one single product
c)
CO2 and H2O must be products
d)
O2 must be a reactant
47.
Which of these is not a chemical reaction?
a)
Burning of wood
b)
Milk going bad
c)
Mixing vinegar and baking soda
d)
Melting of ice
48.
What will weigh more when a chemical change is complete?  The reactants before the chemical reaction, or the product after the reaction is complete?
a)
They both will weigh the same
b)
The product always weighs more than the reactant
c)
The reactant will weigh more than the product
d)
They both will loose mass after the reaction
49.
What is the Law of Conservation of mass?
a)
Mass is created in a chemical reaction
b)
Mass is created in a physical change
c)
New chemicals formed from a chemical reaction have a larger overall mass than the original reactants
d)
Mass is never created or destroyed
50.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge
51.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
52.
How many nitrogen atoms does NH3 have?
a)
1
b)
2
c)
3
d)
4
53.

Which Chemical Equation is Balanced?

a)

CH₄+O₂------CO₂+2H₂O

b)

H₂+O₂-----2H₂O₄

c)

4Al+3O₂-----2Al₂O₃

54.

How many oxygen atoms are in this chemical formula?

a)

6 oxygen atoms

b)

2 oxygen atoms

c)

3 oxygen atoms

d)

4 oxygen atoms

55.
24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride
a)
62 
b)
38
c)
24
d)
14
56.

How many Oxygen atoms are present in the product of the following equation: 2SO2 + 2H2O2 ----> 2H2SO4

a)

2

b)

3

c)

4

d)

8

57.

How many Hydrogen atoms are present in the product of the following equation: 2SO2 + 2H2O2 ----> 2H2SO4

a)

2

b)

3

c)

4

d)

8

58.
The number of atoms of  N (nitrogen) in 3N2O5 is
a)
2
b)
5
c)
6
d)
15
59.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
60.
The number in front of a compound or element is a 
a)
Subscript
b)
Coefficient
c)
Superscript
d)
Charge
61.
Evidence of a chemical reaction include:
a)
Phase change
b)
No new substance
c)
Bubbles forming
d)
Shape change
62.
Substances present at the start of a chemical reaction
a)
subscripts
b)
coefficients
c)
reactants
d)
products
63.
Electrons in the outermost orbit or shell
a)
quarks
b)
molecules
c)
valence
d)
compounds
64.
How many iron atoms are in 
Fe(NO3)2
a)
1
b)
2
c)
3
d)
6
65.

Make this problem a double replacement reaction

AB + CD →

a)

AD + CB

b)

BB + CD

c)

AA + AD

d)

AB + CD

66.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
6
c)
8
d)
24
67.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
68.
Balance this equation,            
Al2O3 --> Al + O2 
a)
Cannot be balanced
b)
2Al2O3 --> 2Al+3O2 
c)
2Al2O3--> 4Al+3O2 
d)
3Al2O3--> 2Al+O2 
69.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced

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