I have a chemistry lab write-up due tomorrow. We had to construct an "air bag" using a plastic bag, sodium carbonate, and aceitic acid. One of our question is:
What amounts of reactants did you use? What volume of gas was generated?
We used 15 g of sodium carbonate and 20 ml aceitic acid. How would I find out how much gas was generated??
Thanks
2007-04-04 15:07:27 · 2 answers · asked by Jennifer 2 in Science & Mathematics ➔ Chemistry
write the balanced equation and calculate the stoichiometry
Assuming STP, each mole of gas occupies 22.4 liters
2007-04-04 15:13:16 · answer #1 · answered by reb1240 7 · 0⤊ 0⤋
okay, well i think you actually used sodium bicarbonate so i'm going to follow this through using that.
NaHCO3 + CH3OOH --> CO2 + NaCH3O2 + H2O
1:1:1:1:1 ratio
calculate limiting reactant
use stoichiometry
15 gNaHCO3 * inverted molar mass * mole ratio = mol CO2
20mL CH3OOH * density of CH3OOH * inverted molar mass * mole ratio = mol CO2
the one that yields the smallest number of moles is the limiting reactant and that number of moles of CO2 should be produced.
so this gives you the number of moles of gas produced. I think the volume of a gas depends on the volume of its container. So without knowing that, i can only suggest trying to use gas laws.
2007-04-04 15:30:00 · answer #2 · answered by Anonymous · 0⤊ 0⤋