Show:
Chemical Reactions
Chemical Reactions II
Chemical Reactions III
Chemical Reactions IV
Potpourri
100
One of the following is NOT a physical change: splitting wood, melting ice, burning wood or dissolving salt in water.
What is burning wood?
100
In the formula 5CaSO4, this is the number of oxygen atoms.
What is 20?
100
A substance that enters a chemical reaction is called this.
What is a reactant?
100
A reaction that releases energy is called this.
What is exothermic?
100

My middle name. 

What is Marie?

200
In a chemical reaction the substances to the right of the arrow are called this/these?
What is/are products?
200
DOUBLE JEOPARDY!!!!!!!!!!
C3H8 + O2 arrow 3CO2 + 4H2O + thermal energy is this type of reaction.
200
When two or more simple substances combine to form a new, more complex substance it is this type of reaction.
What is synthesis?
200
DOUBLE JEOPARDY!!!!!!!!!!!!!
A chemical reaction in which energy is absorbed.
200

The type of chemical reaction that occurs when soda goes flat. 

What is decomposition?

300
The number that describes how many molecules of a substance are involved in a chemical reaction.
What is a coefficient?
300
A substance that increases the reaction rate without changing itself is this.
What is a catalyst?
300
DOUBLE JEOPARDY!!!!!!!!!
An expression in which symbols and formulas are used to represent a chemical reaction.
300
During a chemical reaction chemical bonds can be formed when electrons are shared, gained or lost.....
What is all three?
300
State the Law of Conservation of Mass.
What is that matter can not be created or destroyed in a chemical reaction?
400
When balancing an equation, this can not be changed.
What is a subscript?
400
DOUBLE JEOPARDY!!!!!!!!!!!!!
A solid that forms from a solution during a chemical reaction.
400
An increase in temperature will usually cause the rate of reaction to ________________.
What is increase?
400
The reaction 2HgO arrow 2Hg + O is an example of this type of reaction.
What is decomposition?
400
Define activation energy.
What is the energy required to start a chemical reaction?
500
Give three examples that a chemical change has taken place.
What is temp. change, color change, formation of an alloy, formation of a precipitate, formation of a gas?
500
DOUBLE JEOPARDY!!!!!!!
What are four ways to speed up a reaction?
500
Balance the reaction: C3H8 +O2 -> CO2 + H20
What is C3H8 + 5O2 -> 3CO2 + 4H2O
500
Balance the reaction: Na + H2O -> NaOH + H2
What is 2Na + 2H2O -> 2NaOH + H2
500
Balance the reaction: HCl + Ca(OH)2 -> CaCl2 + H2O
What is 2HCl + Ca(OH)2 -> CaCl2 + 2H2O