Balanced equations and associated calculations

Question 1

Steps for Balanced equation

Answer 1

Al + O2 –> Al2O3

Question 2

Balance aluminium atoms

Answer 2

2Al + O2 –> Al2O3

Question 3

Balance Oxygen

Answer 3

2Al + 3O2 –> 2AlO3

Question 4

Balance Aluminium

Answer 4

4Al + 3O2 –> 2AlO3

Question 5

1) Ionic Equations

Answer 5

H+ + Cl- + Na+ + OH- –> Na+ + Cl- + H2O

Question 6

2) Strike out ions that appear on each side

Answer 6

H+ + OH- –> H2O

Question 7

Spectator Ions

Answer 7

Na+ and Cl-

Question 8

Balancing Tips

Answer 8

• Ionic equation charges must be equal

- number in front of symbol tell u how many moles reacting