REVIEW
Mention the mole ratio of H2 : Cl2 : HCl in the reaction
H2 (g) + Cl2 (g) -> 2 HCl (l)
the mole ratio of H2 : Cl2 : HCl = 1 : 1 : 2
What is a limiting reactant?
reactant that limits the amount of products.
Mention one use of a limiting reactant in daily life!
PREDICTING PRODUCT AMOUNT
MANUFACTURING AND INDUSTRY
COOKING AND BAKING
PHARMACEUTICALS
Given the following reaction
C3H8 (g) + 5 O2 -> 3 CO2 + 4 H2O
Find the mole of O2 needed to react with 0.2 moles of propane,C3H8
The mole ratio of C3H8 : O2 = 1 : 5
Mole of O2 is = 5 x 0.2 = 1 mole.
Given that 5 moles of C2H4 reacted with 18 moles of O2 via the following reaction:
C2H4 (g) + 3 O2 (g) -> 2 CO2 (g) + 2 H2O (g)
Find the limiting reactant!
Use the formula = moles : stoichiometric coeffient
C2H4 = 5:1 = 5
O2 = 19 : 3 = 6
5< 6
C2H4 is the limiting reactant.
Given the reaction :
SO2 (g) + O2 (g) -> SO3 (g) (unbalanced)
If 3 moles of SO2 reacted with 1 mole of O2, find the limiting reactant!
2 SO2 (g) + O2 (g) -> 2 SO3 (g)
SO2 = 3:2 = 1.5
O2 = 1: 1 = 1
LR = O2
Given the reaction:
N2 (g) + 3 H2 (g) -> 2 NH3 (g)
2 moles of N2 reacted with 4 moles of H2 , find the moles of NH3 formed!
N2 = 2:1 =2
H2 = 4:3 = 1.3
Limiting reactant: N2
Moles of NH3 formed: 2 x 1.3 = 2.6 mol