Question

250 g of calcium oxide formed when heating 500 g of calcium carbonate percentage yield?

Answer 1

To calculate the percentage yield, follow these steps:

1. Determine the molar masses:

   • CaCO3: 40 (Ca) + 12 (C) + 3 * 16 (O) = 100 g/mol
   • CaO: 40 (Ca) + 16 (O) = 56 g/mol

2. Calculate the theoretical yield of CaO:

   • Moles of CaCO3 used: 500 g / 100 g/mol = 5 moles
   • The reaction shows a 1:1 mole ratio between CaCO3 and CaO
   • Theoretical yield of CaO: 5 moles * 56 g/mol = 280 g

3. Calculate the percentage yield:

   • Percentage yield = (actual yield / theoretical yield) * 100
   • Percentage yield = (250 g / 280 g) * 100 ≈ 89.29%

Therefore, the percentage yield of calcium oxide is approximately 89.29%.