Download Balance the following equations and identify their reaction type

Science 90 Chemistry Review Sheet
Balance the following equations and identify their reaction type.
___Au2O3  ____ Au + ___ O2
___H2O2  ____ H2O + ____ O2
___SiO2 +___ HF  ___ SiF4 + ____H2O
___Fe2O3 + ___ C  ___ CO + ___Fe
___Fe3O4 + ___ H2  ___ Fe + ___ H2O
Draw the Bohr models for the following elements
C
H
Cl
Ar
Draw the electron dot diagrams for the following elements
Na
P
Ne
B
1. Write the word equations for the following reactions. (8)
a. Hydrochloric acid reacts with Zinc to produce Zinc Chloride and
Hydrogen gas.
b. Lead iodide and potassium nitrate are produced by the reaction of
Potassium iodide and lead nitrate.
c. Sodium chloride is produced from the reaction of sodium and
chlorine gas.
d. Acetylene burns to produce carbon dioxide and water (careful with
this one, there’s a trick)
2. Identify each of the following substances as (5)
E = Element
C = Compound
M = Mechanical Mixture
S = Solution
a. Salt water
d. Gold
b. Oxygen gas
e. Salt
c. Lemonade
For each of the following elemental symbols, state the element
1. Fe
6. Helium
2. Mg
7. Copper
3. Au
8. Nickel
4. Be
9. Phosphorus
5. Na
10.
Boron
Explain the meaning of each letter and number in the following equations.
NaCl
S2SO4
CO2
List the 5 clues that a chemical change has occurred.
How many Protons, Neutrons and electrons are in the following elements?
Ag
Ca
Si
U
Ne
F
P
P
P
P
P
P
N
N
N
N
N
N
e
e
e
e
e
e
Identify the following WHMIS symbols
Identify the following as either Physical or Chemical changes. If it is Chemical,
explain what indicators were present.
1. Sugar dissolves in warm water
7. Dry Ice (solid carbon dioxide -- CO2) is
sublimed at room temperature.
Physical Change
Physical Change
Chemical Change
Chemical Change
2. A nail rusts.
Physical Change
Chemical Change
3. A glass breaks.
Physical Change
8. Vinegar reacts when mixed with baking
soda.
Physical Change
Chemical Change
9. Water boils at 100 degrees Celsius
Chemical Change
Physical Change
4. A piece of paper burns.
Chemical Change
Physical Change
10. Zinc when immersed in Hydrochloric Acid
produces hydrogen gas.
Chemical Change
Physical Change
5. Iron and sulfur mix and form a partially
magnetic black and yellow mixture.
Physical Change
Chemical Change
6. Iron and sulfur are heated and form a nonmagnetic shiny grey substance.
Physical Change
Chemical Change
Chemical Change