Easy to understood; Science

QUATIONS
AND
MEMICAL
REACTIONS

CHEMICAL


J
in state
change =>D REACTION
in colour
-


change
evolution of gas
change in temperature
CHEMICAL EQUATIONS (MgO)
(Mg) (02) - Oxide
Magnesium t
Oxygen Magnesium

3
(Product)
creactant)
Plus

Sign
each element
atoms of
count and compare the number of number of
RHS on the arrow If .




sides
on the LHS and both the
the same on
element
atoms each
Of m
Balanced SKELETAL EQUATION
↓ -




>
-
Is not - unbalanced

, H2
Example
-
Fe + 120 >
- Fezy +



from
Malance
> FezOp + Ha
120
-


3fe +


Balance
Oxygen
3 fe + 4120 >
- fez0y + 12

Hydrogen
Balance
4120 +
fez0y + 44z
3fe +



Final Balanced equation

-Fe +
4420,g) + Fez0y(s) +
442(9)
[S]