chemical quantities, reactions and equilibrium
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what is 1 mole
6.02 x 10*23 (which is avogadro’s number)
when was avogadro’s number (1 mole) developed
1811
in a calculation what do brackets suggest
that we have to multiply everything in the bracket by the number outside it
what is molar mass
this is the mass of a compound divided by the moles (g/mol)
how do we calculate molar mass
mass/ amount in moles (n)
how do we calculate mass
molar mass x amount in moles
how do we calculate moles
mass/ molar mass
what is concentration
the amount of a substance in a defined volume
what are the units of concentration
molarity (M)
how do you calculate concentration
molarity (M)= moles (mol)/ volume (L)
how do you calculates moles of a solution
molarity x volume
how do you calculate the volume of a solution
moles/ molarity
if you see a volume with ml as units what do you do
convert it into L by dividing it by 1000
what is the calculation for dilution
C1 x V1 = C2 x V2
what does C1 and V1 stand for
initial concentration and initial volume
what does C2 and V2 stand for
final concentration and final volume
what is the calculation for initial concentration
C2 x V2/ V1
what the calculation for initial volume
C2 x V2/ C1
what’s the calculation for final concentration
C1 X V1/ V2
what’s the calculation for final volume
C1 X V1/ C2
what are reversible reactions
a reaction that can go forward and back
what is an example of a reversible reaction
N2 + 3H2= 2NH3 2NH3= N2 + 3H2
what is equilibrium
when a forward reaction equal to the rate of the reverse reaction
what is the equation to represent equilibrium
rate F = rate R (forward) (reverse)