Now, I'm going to post how to figure out the theoretical yield of carbon dioxide from 1.00g sodium bicarbonate...
The reaction of citric acid and sodium bicarbonate is written as
H3C6H5O7(aq) + 3 NaHCO3(aq) → Na3C6H5O7(aq) + 3 H2O(l) + 3 CO2(g)
Um.. I think it's the same mole ratio so would I just take the moles of NaHCO3 and divide by the moles of CO2? and then what? I found the moles of CO2 = 1/molar mass 44 = 0.227 so would it be 0.0119 NaHCO3/ 0.227 CO2 = 0.0524? but what is that? what is the 0.0524 number supposed to be?
Thanks Dr. Bob,
Jennie
Then it asks me to calculate percentage yield of plastic cup A.. My records for cup A is
mass of cup, water, and stirrer = 54.66 g
mass of sodium bicarbonate = 1.02g
mass of citric acid = 0.77 g
total mass (add 1,2,3) = 56.45g
mass of cup, solution, and stirrer after the reaction = 56.21
difference (mass of carbon dioxide)=0.24g
So the answer to the top question will give me my theoretical yield, and the actual yield is my calculations of my experiment and I know that % yield is AY/TY... However, How do I start my calculations?? I need a nudge!! and I'm on my way! thanks, Dr. Bob!!
I answered below at the first post and I don't agree with your calculations. You never had 1g CO2 did you?
To calculate the theoretical yield of carbon dioxide (CO2) from 1.00g of sodium bicarbonate (NaHCO3) in the given reaction, you are correct that you need to use the mole ratio between NaHCO3 and CO2 to determine the number of moles of CO2 that should be produced.
1. Calculate the moles of NaHCO3:
- Moles = mass / molar mass
- Moles of NaHCO3 = 1.00g / molar mass of NaHCO3
2. Use the balanced equation to determine the mole ratio between NaHCO3 and CO2: 3 moles of NaHCO3 produce 3 moles of CO2.
3. Calculate the moles of CO2 that should be produced:
- Moles of CO2 = moles of NaHCO3 * (3 moles of CO2 / 3 moles of NaHCO3)
Now, addressing your question about the number 0.0524, that would be the moles of NaHCO3 relative to the moles of CO2. It represents the ratio of moles of NaHCO3 to moles of CO2, not an actual physical quantity.
Moving on to calculating the percentage yield of plastic cup A:
1. Calculate the actual yield (AY) of carbon dioxide:
- AY = mass of carbon dioxide produced
2. Calculate the theoretical yield (TY) of carbon dioxide using the previously calculated moles of CO2 and the molar mass of CO2:
- TY = moles of CO2 * molar mass of CO2
3. Calculate the percentage yield (% yield) using the formula:
- % Yield = (AY / TY) * 100
By substituting the values of AY and TY into the formula, you will be able to find the percentage yield of plastic cup A. Remember that the theoretical yield represents the maximum amount of a product that can be obtained in a reaction, while the actual yield represents the amount obtained in the experiment. The percentage yield compares the actual yield to the theoretical yield and tells you how efficient the reaction was.