Balancing Chemical Reaction Equations

What law governs the balancing of chemical equations?

• Law of Conservation of Energy

• Law of Conservation of Mass

• Law of Conservation of Charge

• Law of the United States of America

What is the left part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

What is the right part of a chemical equation called...
2H_{2 +} O₂ --> 2H₂O

• Reactants
• Products 
• Yields 
• Chemical Equation 

Tags

NGSS.MS-PS1-5

How many different types of elements are in C₆H₁₂O₆?

• 1

• 2

• 3

• 4

What is the number before a chemical formula called?

Example: 2H₂ + O₂ ---> 2H₂O

• Coefficient

• Atom

• Subscript

• Equation

What is the little number after an element in a chemical equation called.
Example: H₂

• Coefficient 
• Subscript
• Atom
• Equation

Is the following equation balanced?...
Al + O₂ --> 2Al₂O₃

• Yes!
• No!

Tags

NGSS.MS-PS1-5

Is the following equation balanced?
4Fe + 3O₂ --> 2Fe₂O₃

• yes
• no

Tags

NGSS.MS-PS1-5

Balance the following:

_P₄+_O₂ → _P₂O₃

• 3 P₄+1 O₂ → 2 P₂O₃

• 1 P₄+1 O₂ → 2 P₂O₃

• 1 P₄+ 3 O₂ → 2 P₂O₃

• 1 P₄+ 2 O₂ → 3 P₂O₃

Balance the following:

_AlBr₃ + _K₂SO₄ → _KBr + _Al₂(SO₄)₃

• 6 AlBr₃ + 1 K₂SO₄ → 6 KBr + 1 Al₂(SO₄)₃

• 2 AlBr₃ + 3 K₂SO₄ → 6 KBr + 1 Al₂(SO₄)₃

• 1 AlBr₃ + 1 K₂SO₄ → 2 KBr + 3 Al₂(SO₄)₃

• 2 AlBr₃ + 3 K₂SO₄ → 1 KBr + 2 Al₂(SO₄)₃