Chemical Equations

Diatomic Gases Elements that bond to another atom of itself to become stable H2 , N2 , O2 , F2 , Cl2 , Br2 , I2 More on Molecules

Write the following as a Chemical Equation Hydrogen gas reacts with oxygen gas to produce water H2 + O2  H2O What’s wrong with this equation? It appears as if we lost an oxygen atom

Balancing Equation Blogs Balancing Equations Balancing Equation Blogs

2 H2 +  O2 H2O 2 Reactants Products H  2 4 H  2 4 O  2 O  1 2

Balancing Equations Use coefficients (# in front of formula) to balance Never change subscripts to balance

Practice These Equations

Tips for Balancing Balance elements one at a time Balance elements that only appear once on each side of the  Balance hydrogen and oxygen last if possible Use the smallest coefficients possible (reduce) Balance polyatomic ions as a unit if they appear on both sides of the 

Balancing Quiz