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