Barium sulfate, BaSO4 is made by the following reaction.
Ba(NO3)2(aq) + Na2SO4(aq)----> BaSO4(s) + 2NaNO3(aq)
An experiment was begun with 91.77 g of Ba(NO3)2 and an excess of Na2SO4. After collecting and drying the product, 62.3 g of BaSO4 was obtained. Calculate the theoretical yield and percentage yield of BaSO4.
------?----------g of BaSO4 would be expected, hence we have-------?-------- % yield.
I got answer 119.45g and theoratical yield 52.1557 %
Is that correct?
please help me out, thanks
Ratio
To calculate the theoretical yield and percentage yield of BaSO4, we need to use the given information and stoichiometry.
First, we need to determine the limiting reagent, which is the reactant that will be completely consumed and determine the maximum amount of product that can be formed.
1. Calculate the moles of Ba(NO3)2:
Molar mass of Ba(NO3)2 = (1 x molar mass of Ba) + (2 x molar mass of NO3)
= (1 x 137.33 g/mol) + (2 x (14.01 + (3 x 16.00) g/mol))
= 261.34 g/mol
Moles of Ba(NO3)2 = mass (g) / molar mass (g/mol)
= 91.77 g / 261.34 g/mol
= 0.3510 mol
2. Calculate the moles of BaSO4 based on the balanced equation:
From the balanced equation: 1 mol of Ba(NO3)2 reacts with 1 mol of BaSO4
So, moles of BaSO4 = moles of Ba(NO3)2 = 0.3510 mol
3. Calculate the theoretical yield of BaSO4:
Molar mass of BaSO4 = (1 x molar mass of Ba) + (1 x molar mass of S) + (4 x molar mass of O)
= (1 x 137.33 g/mol) + (1 x 32.07 g/mol) + (4 x 16.00 g/mol)
= 233.39 g/mol
Theoretical yield (g) = moles of BaSO4 x molar mass of BaSO4
= 0.3510 mol x 233.39 g/mol
= 81.7039 g
Therefore, the theoretical yield of BaSO4 is 81.7039 g.
4. Calculate the percentage yield of BaSO4:
Percentage yield = (Actual yield / Theoretical yield) x 100
Actual yield = 62.3 g (given)
Percentage yield = (62.3 g / 81.7039 g) x 100
= 76.18%
Therefore, the theoretical yield of BaSO4 would be expected to be 81.7039 g, hence we have a percentage yield of 76.18%.
I don't get those numbers.
1. Convert 91.77 g Ba(NO3)2 to moles. moles = grams/molar mass.
2. Using the coefficients in the balanced equation, convert moles Ba(NO3)2 to moles BaSO4.
3. Convert moles BaSO4 to grams. g = moles x molar mass. This is the theoretical yield. Post your work if yu get stuck.