Chemistry Sem Rev Practice Sp 1516 Chemical Reactions

What type of chemical reaction is this one?
Al(OH)₃ --> Al2O3  + H2O

• Decomposition
• Combustion
• Synthesis
• Single Replacement 

What type of chemical reaction is this one?
CUO + CO2 --> CuCO3

• Decomposition
• Combustion
• Synthesis
• Single Replacement 

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Is the equation balanced?: 2H₂ + 2O₂ --> 2H₂O

• Yes
• No

What is a reactant?

• The chemical substances that begin the reaction.
• What comes from the reaction.

Decomposition occurs when...

• Two formulas combine.
• A formula breaks apart.
• An atom is replaced during a reaction.

What must go in the blank space to balance the equation?
4Fe  +  _O₂  -->  2Fe₂O₃

• 1
• 2
• 3
• 4

What coefficients are needed to correctly balance the equation?
_Bi   +   _O₂   >   _Bi₂O₃

• 3,2,3
• 2,3,2
• 4,3,2
• none of these

In a chemical equation, the substances that are on the right side of the arrow are the...

• reactants
• products
• catalysts
• inhibitors

Why must chemical equations be balanced?

• So that the equation doesn't explode
• The reaction won't happen until it is balanced
• Matter cannot be created or destroyed
• None of these