Balance equations: Synthesis Reaction

NaBr + Ca(OH)2 →CaBr2 + NaOH What type of reaction?

• Synthesis
• Decomposition
• Single Replacement
• Double Replacement

How many Oxygens are in this molecule? 
(OH)₂

• 4
• 1
• 2
• 3

What are the smaller numbers that you CANNOT change in a chemical equation? 

• Coefficient
• Products
• Reactants
• Subscript

What are the larger numbers that you CAN CHANGE in a chemical equation? 

• Coefficient 
• Products
• Reactants
• Subscripts

__Na  +  O₂ ----->  __Na₂O
Type of reaction? 
Balance it too. :)

• Synthesis, 2Na /  4Na₂O
• Decomposition, 4Na /  2Na₂O
• Synthesis, 4Na /  2Na₂O
• Decomposition, 2Na /  4Na₂O

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

• Synthesis
• Decomposition 
• Single Replacement
• Combustion 

What law governs the balancing of chemical equations? 

• Law of Energy
• Law of Conservation of Matter/Mass
• Law of Gravity
• Law of Matter Movement 

Why is it called the Law of Conservation of Matter/Mass? 

• Energy is created and destroyed 
• Energy is never created, nor destroyed-- it always moves 
• Energy moves between particles
• Energy stops moving at the end of the universe 

Without balancing the final equation, predict the products for the synthesis reaction:  $Li\ +\ Cl_2\ \rightarrow$  ?

•  $LiCl_2$  

•  $LiCl_{ }$  

•  $Li_2Cl_2$  

•  $Li_2Cl_{ }$  

Without balancing the final equation, predict the products for the synthesis reaction: $Mg\ +\ Br_2\ \rightarrow$ ?

•  $MgBr$  

•  $MgBr_2$  

•  $Mg_2Br$  

•  $Mg_2Br_2$