Balancing and Classifying Chemical Equations

The subscript tells you how many of what there are in a chemical reaction?

• atoms of that element

• molecules of that compound

• number of reactions

• They don't tell you anything.

Tags

NGSS.MS-PS1-5

A coefficient tells you what about the chemical reaction?

• Numbers of atoms in that element

• Numbers of molecules for that compound.

• How many reactions there are.

• They don't tell you anything.

Classify
Zn + H₂S → ZnS + H₂

• synthesis

• combustion

• single replacement

• double replacement

Tags

NGSS.MS-PS1-5

Classify
CH₄ + O₂ → CO₂ + H₂O 

• single replacement

• double replacement

• synthesis

• combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify
FeS + HCl → H₂S + FeCl₂

• synthesis

• combustion

• single replacement

• double replacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify
Fe + O₂ → Fe₂O₃

• synthesis

• decomposition

• double replacement 

• single replacement

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Pb(NO₃)₂  +  KI --> PbI₂ + KNO₃
What type of reaction is this? 

• Synthesis 

• Decomposition 

• Single Replacement

• Double Replacement 

What type of reaction is this?  
__H₂O₂ ---->  __H₂O + O₂

• Synthesis

• Decomposition 

• Single Replacement

• Combustion 

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Mg + N₂ →Mg₃N₂

• Synthesis

• Decomposition

• Single replacement

• Combustion

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What coefficient should be used to make the following equation balanced?
N₂+O₂--> _NO 

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5