Lab Report: The Castle of Quantification
Mass of “R” boiling tube: 41.83g
Mass of zinc used: 2.00g
Mass of iodine used: 1.00g
Volume of acetic acid used: 5.00 mL
Mass of excess zinc and “R” boiling tube after rinsing, heating and cooling: 43.56g
Mass of excess zinc and “R” boiling tube after rinsing, heating and cooling a second time: 43.56g
Mass of “P” boiling tube and boiling chip: 41.92g
Mass of “P” boling tube, boiling chip, and zinc iodide after heating and cooling: 43.19g
Mass of “P” boling tube, boiling chip, and zinc iodide after heating and cooling a second time: 43.19g
Atomic mass of zinc: 65.39g/mol
Atomic mass of Iodine: 253.8g/mol
Description of reaction between zinc and iodine:
Zinc and iodide combine to form zinc iodide. Zinc loses an electron while iodide gains an electron thus making it a redox reaction.
Results of trials:
Trials | Mass of zinc before rxn | Mass of iodine before rxn | Mass of excess zinc | Mass of zinc reacted | Mass of iodine reacted (assumed) | Mass of zinc and iodine reacted | Mass of zinc iodide produced |
1 | 2.00g | 3.00g | 0.80g | 1.20g | 3.00g | 4.20g | 3.90g |
2 | 1.00g | 2.00g | 0.03g | 0.97g | 2.00g | 2.97g | 2.61g |
3 | 2.00g | 1.00g | 1.73g | 0.27g | 1.00g | 1.27g | 1.27g |
4 | 2.99g | 1.99g | 0.80g | 2.19g | 1.99g | 4.18g | 4.02g |
5 | 2.00g | 2.00g | 1.52g | 0.48g | 2.00g | 2.48g | 2.60g |
1. Yes, mass is conserved in the chemical reaction we studied.
Confidence report part 1:
I believe my group and class did not, for the most part, “good” data. All of the containers we used were properly sanitized before using them. All of the measurements we took were double checked and done accurately to the best of our ability. All of our calculations were correctly done via calculator. Most of the data made sense. Each group produced less zinc than they started out with as well as less iodine, which means they did the test and reaction properly. I say our...