Magnesium (mg) Strip
Biochemistry Internal Examination 8
Lee Dong Hun (16) your five. 12 Proverbs
Table 1: Mass of Magnesium Strip
Mass of Magnesium Remove and Evaluating bottle /g (± zero. 001g)| 3. 585| Mass of Considering bottle /g (± zero. 001g)| three or more. 460
Mass of Magnesium (mg) Strip /g (± zero. 002g)| 0. 125
Stand 2: Mass of Crucible and top
Mass of Crucible /g (± zero. 001g)| 12-15. 147
Mass of Cover /g (± 0. 001g)| 9. 670
Table several: Mass of Magnesium O2
Mass of Magnesium O2 and Crucible and Cover /g (± 0. 001g)| 24. 985| Mass of Crucible and Lid /g (± zero. 002g)| twenty-four. 817
Mass of Magnesium (mg) Oxide /g (± 0. 003g)| zero. 168
Mass of Fresh air reacted with Magnesium
= 0. 168 - 0. 125
sama dengan 0. 042g ± 0. 005g
Both the crucible as well as the lid are in good condition, with a few stains. The magnesium tape was finished to reveal a grey solid.
When ever burning in air, the magnesium deprive glows.
After complete effect, a dark powder was observed inside the crucible.
Finalizing of Data| Processing of Uncertainties
No of moles of Mg in reaction= 0. 12524. 31= 0. 00514 mol (to 3sf)No of moles of Oxygen in reaction= zero. 04216. 00= 0. 00263 mol (to 3sf)No of moles of Mg: Not any of moles of O= 2: one particular ∴ Scientific formula of the compound sama dengan Mg2O| Percentage Uncertainty of No of moles of Mg in reaction= zero. 0020. 125 ×100%= 1 . 60% (to 3sf)Absolute concern of Simply no of moles of Magnesium in reaction= 0. 00514 × 1 ) 60100= zero. 00008 mol (to 5dp)Percentage Uncertainty of No of moles of O in reaction= fully × 0. 0050. 042= 11. 9%Absolute Uncertainty of No of moles of O= eleven. 9100 ×0. 00263= 0. 00032 mol (to 5dp)
There have been a existence of a systematic error, since the experiment setup cannot stop the fumes of Magnesium o2 from getting out the crucible, which generated the amount of fresh air being noticed as much smaller than the worth that it really should have been.