Vinegar is a dilute solution ethanoic acid in water (see the question above for the structure of ethanoic acid). In order to tes
t the strength of a vinegar, a 10.00 gram sample was titrated with sodium hydroxide (0.1001 mole/kg of solution). The mass of the. burette before the titration is 131.44 g and upon reaching the endpoint the burette weighted 48.11 g. How many moles of acetic acid are in the sample?
To determine limiting reactant divide mole quantities of reactants by the respective coefficient in the balanced equation. The smaller value is the limiting reactant.
P₄ + 5O₂ => 2P₂O₅
12/1 = 12 15/5 = 3
O₂ is the limiting reactant. P₄ will be in excess when rxn stops.