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Grade 12 · Chemistry

Grade 12 Analytical chemistry worksheet

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

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What is on the worksheet

  1. A 204 g sample is 46% desired substance by mass. Find the desired substance mass. Round to 3 decimal places if needed. Answer in g.

  2. A 243 g sample is 23% desired substance by mass. Find the desired substance mass. Round to 3 decimal places if needed. Answer in g.

  3. The theoretical dry pure product mass is 64 g; the actual dry pure product mass is 33 g. Find percentage yield. Round to 3 decimal places if needed. Answer in %.

  4. An aqueous solution has concentration 2 mol/L. A model aliquot has volume 367 mL. Find the solute amount. Round to 3 decimal places if needed. Answer in mol.

  5. A 18 mL aliquot at 1.6 mol/L is diluted to 108 mL total without reaction or loss. Find the final concentration. Round to 3 decimal places if needed. Answer in mol/L.

  6. A supplied valid-range calibration is S = 10c + 0.7. The signal is 2.8. Find c in the calibration's arbitrary concentration units. Round to 3 decimal places if needed.

  7. A supplied valid-range calibration is S = 19c + 0.9. The signal is 6. Find c in the calibration's arbitrary concentration units. Round to 3 decimal places if needed.

  8. A supplied valid-range calibration is S = 9c + 0.8. The signal is 7.1. Find c in the calibration's arbitrary concentration units. Round to 3 decimal places if needed.

  9. A 279 g sample is 25% desired substance by mass. Find the desired substance mass. Round to 3 decimal places if needed. Answer in g.

  10. A 67 g sample is 24% desired substance by mass. Find the desired substance mass. Round to 3 decimal places if needed. Answer in g.

  11. The theoretical dry pure product mass is 92 g; the actual dry pure product mass is 76 g. Find percentage yield. Round to 3 decimal places if needed. Answer in %.

  12. A 84 mL aliquot at 0.8 mol/L is diluted to 924 mL total without reaction or loss. Find the final concentration. Round to 3 decimal places if needed. Answer in mol/L.

  13. An aqueous solution has concentration 1.8 mol/L. A model aliquot has volume 390 mL. Find the solute amount. Round to 3 decimal places if needed. Answer in mol.

  14. Measured from the same origin, a spot travels 34 mm and the solvent front 57 mm. Find Rf. Round to 3 decimal places if needed.

  15. Measured from the same origin, a spot travels 23 mm and the solvent front 68 mm. Find Rf. Round to 3 decimal places if needed.

  16. A 16 mL aliquot at 1.3 mol/L is diluted to 176 mL total without reaction or loss. Find the final concentration. Round to 3 decimal places if needed. Answer in mol/L.

  17. An aqueous solution has concentration 1.5 mol/L. A model aliquot has volume 71 mL. Find the solute amount. Round to 3 decimal places if needed. Answer in mol.

  18. Measured from the same origin, a spot travels 28 mm and the solvent front 59 mm. Find Rf. Round to 3 decimal places if needed.

  19. A model solution contains 3.1 mol in a final volume of 0.47 L. Find its molar concentration. Round to 3 decimal places if needed. Answer in mol/L.

  20. A 75 mL aliquot at 1.6 mol/L is diluted to 150 mL total without reaction or loss. Find the final concentration. Round to 3 decimal places if needed. Answer in mol/L.

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