When 25g of So2 reactants with oxygen, 27g of So3 is formed. What's the percentage yield?
To determine the percentage yield, we need to find the theoretical yield first and then compare it to the actual yield (27g of SO3).
1. Write the balanced chemical equation:
2 SO2 + O2 → 2 SO3
2. Calculate the moles of SO2:
25g SO2 * (1 mol SO2 / 64.07g SO2) = 0.390 mol SO2
3. Calculate the moles of SO3 using the mole ratio:
0.390 mol SO2 * (2 mol SO3 / 2 mol SO2) = 0.390 mol SO3
4. Calculate the theoretical yield of SO3:
0.390 mol SO3 * (80.07g SO3 / 1 mol SO3) = 31.23g SO3
5. Calculate the percentage yield:
Actual yield / Theoretical yield = 27g / 31.23g = 0.865
Percentage Yield = 0.865 * 100 = 86.5%