​
a
2
b
2
Plot
reaction/product masses
MW A
10
mA
50
MW B
10
mB
50
2A + 2B ⟶
2
3
A
2
B +
2
3
AB
2
excess A (g)
required A (g)
0
50.0
A
2
B (g)
AB
2
(g)
50.0
50.0
total reactants (g)
total products (g)
100.
100.
mA / (MW A × a)
mB / (MW B × b)
2.50
2.50
stoichiometric
stoichiometric
A
B
A
2
B
AB
2
start
end