Chemical Reactions

Chemical Reactions

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?

200

In a chemical reaction the substances to the right of the arrow are called this/these?

What is/are products?

300

This is the symbol written above the yields arrow to show that a reaction must be heated.

What is a triangle?

400

When balancing an equation, these numbers can not be changed.

What is a subscript?

500

Give 2 examples that a chemical change has taken place.

What is temp. change, color change, odor change, formation of a precipitate, formation of a gas?

Chemical Reactions II

100

In the formula 5CaSO₄, this is the number of oxygen atoms.

What is 20?

200

DOUBLE JEOPARDY!!!!!!!!!!

C₃H₈ + O₂ ----> 3CO₂ + 4H₂O + energy

What is this type of temperature chemical reaction.

What is combustion?

300

Is this a balanced chemical equation?:

H₂ + NaCl --> HCl + Na

What is no? There is 2 hydrogens on the reactant side and only 1 on the product side. 

400

DOUBLE JEOPARDY!!!!!!!!!!!!!

A solid that forms from a solution during a chemical reaction.

a precipitate

500

An example of this type of reaction is:

2Ca + O₂ -------> 2CaO

What is synthesis?

Chemical Reactions III

100

These are the symbols used to show a precipitate has formed in a chemical equation.

What are a down arrow or (s)?

200

What is the basic formula for a Decomposition reaction?

What is a AB -> A + B?

300

DOUBLE JEOPARDY!!!!!!!!!

An expression in which symbols and formulas are used to represent a chemical reaction.

A chemical equation

400

An example of this type of reaction is:

2Na + NiCl₂ ----->  2NaCl + Ni

What is single replacement?

500

This reaction always results in the production of water, carbon dioxide, and energy

What is a Combustion Reaction?

Chemical Reactions IV

100

This is a chemical compound that helps a reaction to proceed faster but does not change in anyway during the reaction.

What is a catalyst?

200

DOUBLE JEOPARDY!!!!!!!!!!!!!

What is the name for the elements that always appear bonded in pairs?

What is Diatomic?

300

An example of this type of reaction is:

3Ca(OH)₂ + 2FeCl₃ -----> 3CaCl₂ + 2Fe(OH)₂

What is double replacement?

400

The reaction 2HgO ---> 2Hg + O is an example of this type of reaction.

What is decomposition?

500

Is this a balanced equation?: Na + H₂O --> NaOH + H₂

What is no? There are 2 H in the reactants and 3 H in the products.

Chemical Reactions V

100

This type of change occurs with a change in the properties of a substance that is usually reversible.

What is physical?

200

Is the following equation balanced?

6K + 2B₂O₃ -> 3K₂O + 6B

What is yes?

300

State the Law of Conservation of Mass.

What is that matter can not be created or destroyed in a chemical reaction?

400

These are used when balancing a chemical equation in order to obey the Law of Conservation of Mass.

What are coefficients?

500

The chemical change that happens when one element and one compound react to create a new element and a new compound.

What is a single replacement reaction?