Definitions
What is a Mole
It is the amount of a substance needed to make it have the same mass in grams as its molar mass.
Moles
Moles = mass/ Mr
What are the two ways we can measure efficiency?
Atom economy
Percentage yeild
what is the law of conservation of mass
mass cannot be destroyed or created only turned into other forms.
How many atoms are in one mole of a substence
6.02x1023
Mr
Concertation
Concentration = moles,Grams/ volume.
Why is it important to have a high yeild
A high yeild limits waste and saves resorces.
An equation is balanced when?
The same number amount of atoms of each element is on the products and reactant side.
What do we call the exact number of atoms in a mole?
Concentration
The amount of a solute dissolved in a solution.
Percentage yeild
What is one way to improve efficiency?
using a catalyst to change the reaction pathway.
C2H4 + O2 = CO2 + H2O
How many moles are there in 16 grams of O2?
0.5
Limiting factor
The substance that runs out first causing the reaction to stop
Atom economy
Mr of wanted product/ total Mr of reactants
Carbon is used to extract tin (Sn) from tin oxide (SnO2).
The equation for the reaction is:
SnO2 + C → Sn + CO2
Calculate the percentage atom economy for extracting tin in this reaction.
Relative atomic masses (Ar): C = 12 O = 16 Sn = 119
73 (%)
Na + Cl2 = NaCl
2Na + Cl2 = 2NaCl
How many moles are there in 64 grams of CaCO3?
0.64
Burrete
A piece of equipment that is used to add volumes together very carefuly.
moles X 24
Why can a percentage or atom economy never be over 100%
because it is not possible to create mass out of nothing.
C6H12O6+O2 = CO2 + H2O
C6H12O6+ 6O2 = 6CO2 + 6H2O
How many atoms are in 3 moles of Magnesium
1.806X1024