STOICHIOMETRY : Theoretical and Actual Yield

 

Theoretical and actual yield

Q1. When 50.0 g of calcium carbonate (CaCO₃) is heated, 22.4 g of calcium oxide (CaO) is obtained. Calculate the percentage yield of CaO.

Q2. In a reaction, 25.0 g of sodium chloride (NaCl) is obtained from 30.0 g of sodium (Na). Calculate the percentage yield of NaCl.

Q3. A reaction produces 40.0 g of magnesium oxide (MgO) from 30.0 g of magnesium (Mg). If the theoretical yield is 50.0 g, calculate the percentage yield of MgO.

Q4. When 100.0 g of copper(II) sulfate (CuSO₄) is reacted with excess iron, 35.0 g of copper (Cu) is obtained. Calculate the percentage yield of Cu.

Q5. A reaction produces 60.0 g of zinc chloride (ZnCl₂) from 40.0 g of zinc (Zn). If the theoretical yield is 80.0 g, calculate the percentage yield of ZnCl₂.

Higher Thinking

Q6. A reaction involves the combustion of methane (CH₄) to produce carbon dioxide (CO₂) and water (H₂O). If 16.0 g of CH₄ is combusted and 44.0 g of CO₂ is obtained, calculate the percentage yield of CO₂.

Q7. A sample of impure zinc (Zn) is reacted with excess hydrochloric acid (HCl) to produce zinc chloride (ZnCl₂) and hydrogen gas (H₂). If 25.0 g of ZnCl₂ is obtained from 15.0 g of Zn, and the purity of Zn is 80.0%, calculate the percentage yield of ZnCl₂.

Q8. A reaction involves the production of ammonia (NH₃) from nitrogen (N₂) and hydrogen (H2). If 50.0 g of N₂ is reacted with excess H₂ and 60.0 g of NH₃ is obtained, calculate the percentage yield of NH₃.

Q9. A sample of limestone (CaCO₃) is heated to produce calcium oxide (CaO) and carbon dioxide (CO₂). If 200.0 g of limestone is heated and 90.0 g of CaO is obtained, calculate the percentage yield of CaO. Assume the limestone is 90.0% pure.

Q10. A reaction involves the production of sulfuric acid (H₂SO₄) from sulfur trioxide (SO₃) and water (H₂O). If 100.0 g of SO₃ is reacted with excess H₂O and 120.0 g of H₂SO₄ is obtained, calculate the percentage yield of H₂SO₄.