Balanced Equations and Reaction Types

What is a reactant?

• a volatile chemical

• a dangerous substance

• the substances you start with in a chemical reaction

• the substances that are formed by a chemical reaction 

Tags

NGSS.MS-PS1-2

What is a product?

• a fancy word for make-up

• a volatile chemical

• the substances you start with in a chemical reaction

• the substances that are formed by a chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The number of atoms you begin with in a chemical reaction ...

• must be the same as the number of  atoms you end with

• must be an even number

• can be different to the number you finish with

• changes depending on how much energy is formed

Tags

NGSS.MS-PS1-5

Which type of reaction is:

2 NaBr + Ca(OH)₂ → CaBr₂ + 2 NaOH

• Synthesis

• Single Displacement

• Double Displacement

• Combustion

Tags

NGSS.MS-PS1-2

Which type of reaction is: C₂H₄ + 3 O₂ → 2 CO₂ + 2 H₂O

• Synthesis

• Decomposition

• Single Displacement

• Combustion

Tags

NGSS.MS-PS1-2

Which type of reaction is:

2 NH₃ + H₂SO₄ → (NH₄)₂SO₄

• Synthesis

• Decomposition

• Single Displacement

• Double Displacement

Tags

NGSS.MS-PS1-2

What observations could indicate a chemical reaction has taken place?

• A change in color.

• A change in temperature.

• The evolution of a gas.

• A change in odor.

• A change in shape.

How many ELEMENTS are in the compound O₂

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many ELEMENTS are in the compound H₂O

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

Balance this equation.
_Mg + _Cl₂ --> _MgCl₂

• 1, 2,1

• already balanced

• 2,1,1

• 1,1,2

Tags

NGSS.MS-PS1-5