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Grade 10 · Chemistry

Grade 10 Physical chemistry worksheet

20 questions on physical chemistry. The answer key is a separate download.

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What is on the worksheet

  1. At 25 °C, use the dilute model pH + pOH = 14. A solution has pH 8.4. Find pOH. Round to 3 decimal places if needed.

  2. For A ⇌ B, use Kc = [B]/[A]. Equilibrium concentrations are [A] = 1.7 and [B] = 0.4 mol/L. Find Kc. Round to 3 decimal places if needed.

  3. A reactant concentration decreases from 0.31 to 0.16 mol/L in 30 s. Find its positive average disappearance rate. Round to 3 decimal places if needed. Answer in mol/(L·s).

  4. For one reaction as written, a bond model requires 949 kJ/mol to break bonds and releases 905 kJ/mol on forming bonds. Estimate ΔH. Round to 3 decimal places if needed. Answer in kJ/mol.

  5. Use PV = nRT and R = 8.314 kPa·L/(mol·K). Find the ideal-gas volume for 2.5 mol at 313 K and 137 kPa. Round to 3 decimal places if needed. Answer in L.

  6. An ideal gas has initial pressure 111 kPa and volume 5.1 L. At fixed amount and temperature its volume becomes 1.9 L. Find the new pressure. Round to 3 decimal places if needed. Answer in kPa.

  7. A reactant concentration decreases from 0.91 to 0.85 mol/L in 48 s. Find its positive average disappearance rate. Round to 3 decimal places if needed. Answer in mol/(L·s).

  8. A reactant concentration decreases from 0.68 to 0.59 mol/L in 12 s. Find its positive average disappearance rate. Round to 3 decimal places if needed. Answer in mol/(L·s).

  9. A reactant concentration decreases from 1.42 to 1.22 mol/L in 15 s. Find its positive average disappearance rate. Round to 3 decimal places if needed. Answer in mol/(L·s).

  10. A reactant concentration decreases from 0.77 to 0.66 mol/L in 6 s. Find its positive average disappearance rate. Round to 3 decimal places if needed. Answer in mol/(L·s).

  11. Use PV = nRT and R = 8.314 kPa·L/(mol·K). Find the ideal-gas volume for 2.3 mol at 309 K and 144 kPa. Round to 3 decimal places if needed. Answer in L.

  12. Use PV = nRT and R = 8.314 kPa·L/(mol·K). Find the ideal-gas volume for 1 mol at 329 K and 84 kPa. Round to 3 decimal places if needed. Answer in L.

  13. Use PV = nRT and R = 8.314 kPa·L/(mol·K). Find the ideal-gas volume for 1.4 mol at 274 K and 137 kPa. Round to 3 decimal places if needed. Answer in L.

  14. For one reaction as written, a bond model requires 1180 kJ/mol to break bonds and releases 1138 kJ/mol on forming bonds. Estimate ΔH. Round to 3 decimal places if needed. Answer in kJ/mol.

  15. An ideal gas has initial pressure 158 kPa and volume 7.5 L. At fixed amount and temperature its volume becomes 4 L. Find the new pressure. Round to 3 decimal places if needed. Answer in kPa.

  16. For one reaction as written, a bond model requires 549 kJ/mol to break bonds and releases 705 kJ/mol on forming bonds. Estimate ΔH. Round to 3 decimal places if needed. Answer in kJ/mol.

  17. A reactant concentration decreases from 0.78 to 0.63 mol/L in 52 s. Find its positive average disappearance rate. Round to 3 decimal places if needed. Answer in mol/(L·s).

  18. Use PV = nRT and R = 8.314 kPa·L/(mol·K). Find the ideal-gas volume for 0.6 mol at 369 K and 95 kPa. Round to 3 decimal places if needed. Answer in L.

  19. An ideal gas has initial pressure 66 kPa and volume 4.2 L. At fixed amount and temperature its volume becomes 6.6 L. Find the new pressure. Round to 3 decimal places if needed. Answer in kPa.

  20. For A ⇌ B, use Kc = [B]/[A]. Equilibrium concentrations are [A] = 3.2 and [B] = 4.3 mol/L. Find Kc. Round to 3 decimal places if needed.

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