Balancing Chemical Equations

What does the Law of Conservation of Mass state?

• Matter cannot be gained or lost in a chemical reaction.
• Matter can only be lost in a chemical reaction.
• Matter can only be gained in a chemical reaction.
• Matter can be gained and lost in a chemical reaction. 

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 

Match the symbol to the correct word.

• Liquid

• aq

• Yields

• g

• Aqueous

• →

• Solid

• s

• Gas

• l

Balance the equation:  Li + Cl₂ -> LiCl

• 2Li + Cl₂ -> 4LiCl2

• 2Li + Cl₂ -> LiCl₂

• 2Li + Cl₂ -> 2LiCl

What is the little number after an element in a chemical equation called? Example:Cl₂

(a)  

• Subscript
• Coefficient 
• Atom
• Equation

what is a product in a chemical equation?

• a volatile chemical

• a dangerous substance

• the substance(s) you start within a chemical reaction

• the substance(s) you end within a chemical reaction

When the equation is balanced what are the correct coefficients?

Complete the equation :

2K + Magnesium bromide ------- 2 Potassium bromide + Magnesium

Balance this equation, and classify the type of reaction that it corresponds to

__P₄ + __O₂ --> __P₂O₃

• it is already balanced, single replacement

• 2, 1, 3

  Synthesis

• 1, 3, 2

  single replacement

• 1, 3, 2

  Synthesis