4c. Balancing Equations 2

Which side of a chemical equation is the reactant side?

• Left (before the yields sign)
• Right (after the yields sign)

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which side of a chemical equation is the product side?

• Left (before the yields sign)

• Right (after the yields sign)

Which problem is balanced?

• PbO₂ + 2H₂
• SO₂ + H₂0 --> H₂SO₄
• 2Na + 2H₂O --> 2NaOH + H₂

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a coefficient?

• The small number on the right of the chemical symbol.
• The large number to the left of a formula.

Decomposition occurs when...

• Two formulas combine.
• A formula breaks apart.
• An atom is replaced during a reaction.

Tags

NGSS.MS-PS1-5

How would this equation be classified?
O₂ + 2H₂ --> 2H₂O 

• Synthesis
• Decomposition
• Combustion
• Single Displacement

Balance this equation:
FeS + 2HCl -->
FeCl₂ + H₂O

• FeS₂ + 2HCl --> FeCl₂ + H₂O
• It's already balanced
• FeS₂ + 2HCl --> FeCl₂ + H₄O
• None of these

Tags

NGSS.MS-PS1-5

Is this equation balanced?

• yes
• no
• Not enough information
• Left side is balanced

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Balance this equation
_Zn+_HCl-->_ZnCl₂ +_H₂

• 1,1,2,1
• 1,1,1,2
• 1,2,1,1
• 2,1,1,1

Tags

NGSS.MS-PS1-5

How many atoms of aluminum are on each side of the following equation: 4Al + 3O₂ --> 2Al₂ O₃

• 2
• 6
• 1
• 4

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5