7.3- REDOX EQUATIONS

Question 1

What must be obeyed for an equation to be balanced? (2)

Answer 1

number of atoms of each element on each side of equation must be same
total charge on each side of equation must be same

Question 2

How to balance equation using oxidation states? (4)

Answer 2

write oxidation state above each element
identify species that has been oxidised + reduced
include this info in unbalanced equation
balance remaining atoms