NEW
Font size
S
M
L
XL
WorksheetsHydrates and Chemical Equations
Total questions: 34
Worksheet time: 33mins
Name
Class
Date
1.
What is the empirical formula for the following:
32.40% sodium, 22.5% sulfur; 45.1 % oxygen, 37.75% water?
32.40% sodium, 22.5% sulfur; 45.1 % oxygen, 37.75% water?
a)
Na2SO4H6O3
b)
Na2SO4 . 2H2O
c)
Na2SO4 . 3H2O
d)
Na2SO4 . (H2O)3
2.
What are the chemicals on the right side of the arrow in a chemical equation called?
a)
product
b)
reactant
c)
chemicals
d)
mass
3.
What are the chemicals on the left side of the arrow in a chemical equation called?
a)
reactant
b)
product
c)
chemical
d)
mass
4.
What law says that the mass of the reactants should equal the mass of the products in a chemical equation?
a)
Law of Constant Mass
b)
Law of Conservation of Mass
c)
Law of Preservation of Mass
d)
Law of Balance of Mass
5.
Which coefficients balance this equation: Na + Cl2 ---> NaCl
a)
2,1,1
b)
2,1,2
c)
2,2,1
d)
1,2,2
6.
Which of these are not diatomic molecules?
a)
Boron
b)
Iodine
c)
Nitrogen
d)
Oxygen
7.
Which coefficients balance this equation:
NH3 + O2 ----> NO + H2O
NH3 + O2 ----> NO + H2O
a)
2,3,5,6
b)
5,5,4,6
c)
4,6,4,5
d)
4,5,4,6
8.
Name this compound:
Li2(SO4)
Li2(SO4)
a)
Lithium sulfide
b)
Lithium (I) sulfate
c)
Lithium sulfate
d)
Lithium sulfur
9.
What do Roman Numerals represent in the name of a compound?
a)
The number of atoms
b)
The oxidation number of the anion
c)
The oxidation number of the transition metal
d)
The coefficient needed to balance the equation
10.
What numbers balance the equation:
_Pb(SO4) +_NaCl -> _PbCl2 + _Na2(SO4)
_Pb(SO4) +_NaCl -> _PbCl2 + _Na2(SO4)
a)
2,1,2,2
b)
1,1,2,2
c)
1,2,1,1
d)
1,2,1,2
11.
What numbers balance the equation:
_H2 + _O2 --> _H2O
_H2 + _O2 --> _H2O
a)
2,1,2
b)
1,2,1
c)
1,1,2
d)
2,1,1
12.
Balance this equation:
BF3 + Li2SO3 --> B2(SO3)3 + LiF
BF3 + Li2SO3 --> B2(SO3)3 + LiF
a)
2,2,1,6
b)
2,1,6,3
c)
3,2,1,6,
d)
2,3,1,6
13.
Which is the correct equation for this reaction: Sodium Phosphide + Boron oxide --> Sodium oxide + Boron phosphide
a)
3Na3P + B2O3 --> 2Na2O + 2BP
b)
2Na3P + B2O3 --> 3Na2O + 2PB
c)
2NaP3 + B3O2 --> 3NaO2 + B3P
d)
2Na3P + B2O3 --> 3Na2O + 2BP
14.
The correct equation for this reaction is: Manganese (I) hydroxide + Aluminum carbide --> Aluminum hydroxide + Manganese (I) carbide
a)
4Mn(OH) + Al4C3 --> 4Al(OH) + Mn4C3
b)
3Mn(OH)4 + Al3C4 --> 3Al(OH)4 + Mn3C4
c)
Mn(OH)3 + AlC --> Al(OH)3 + Mn4C3
d)
4Mn(OH)3 + Al4C3 --> 4Al(OH)3 + Mn4C3
15.
How many diatomic molecules are there?
a)
4
b)
5
c)
6
d)
7
16.
Which are both diatomic molecules?
a)
Boron and carbon
b)
Bromine and chlorine
c)
Nickel and chromium
d)
Indium and helium
17.
Decomposition occurs when...
a)
Two formulas combine.
b)
A formula breaks apart.
c)
An atom is replaced during a reaction.
18.
A synthesis occurs when...
a)
Two formulas combine.
b)
A formula breaks apart.
c)
An atom is replaced during a reaction.
19.
Ca + AlCl3 --> CaCl2 + Al
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
20.
Si + S8 --> Si2S4
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
21.
KOH + H3PO4 --> K3PO4 + H2O
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
22.
KOH + H3PO4 --> K3PO4 + H2O
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Double replacement
23.
Pb(NO3)2 --> PbO + NO2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
24.
C3H8 + O2 --> H2O + CO2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
25.
Mg + N2 --> Mg3N2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
26.
NO2 --> N2 + O2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
27.
Fe + H2SO4 --> Fe2(SO4)3 + H2
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
28.
C3H6O + O2 --> CO2 + H2O
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
29.
P4 + O2 --> P2O3
a)
Synthesis (combination)
b)
Decomposition
c)
Single replacement
d)
Combustion
30.
How do we name a hydrate?
a)
Add "water" to the end of the chemical name
b)
Use a prefix and add hydrate
c)
Do nothing, it does not change
31.
A compound is a hydrate when it...
a)
is composed of only hydrogen and oxygen
b)
is a state of water
c)
traps water inside of the compound
d)
repels water from the compound
32.
A 15.67 g sample of a hydrate of magnesium carbonate was heated to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate?
a)
MgCO3 · 5H2O
b)
MgCO3 · 4H2O
c)
MgCO3 · 6H2O
d)
MgCO3 · 1H2O
33.
Na2CO3 · 10H2O is known as sodium sulfate ______
a)
Hydroxide
b)
Hydrate
c)
Decahydrate
d)
None of the above
34.
A hydrate of magnesium chloride is present and the following data is collected:
mass of crucible = 22.130 grams
mass of crucible + hydrate = 25.290 grams
mass of crucible and contents after heating = 23.491 grams
What is the complete formula of this hydrate?
mass of crucible = 22.130 grams
mass of crucible + hydrate = 25.290 grams
mass of crucible and contents after heating = 23.491 grams
What is the complete formula of this hydrate?
a)
MgCl2 · 12H2O
b)
MgCl2 · 11H2O
c)
MgCl2 · 6H2O
d)
MgCl2 · 13H2O
Reset
