Law of Constant Composition Lab: Magnesium and Oxygen

Purpose: To determine the percent magnesium by optical sense in magnesium oxide and to observe if the percentage opus is constant by comparing class tops. Hypothesis/ omen: The percent makeup by mass of magnesium in magnesium oxide ordain not change significantly with each(prenominal) group that conducted the experiment. The composition of each substance should stay the alike and any differences essential be due to some error. Materials: magnesium denude melting potmelting pot considerClay triangleIron ringRetort standTongsBalanceBunsen burnerProcedure:1.obtained a strip of magnesium between 30-40 cm long2.coiled magnesium strip into a tight roll3.measured the mass of the crucible and sweep up4.Added the magnesium strip to the crucible and measured the magnesium, crucible and cover together. 5.Partially covered the crucible with the cover and heated it using a Bunsen burner until the magnesium ignited. 6.Turned by Bunsen burner. 7.waited for combustion to proceed8.wh en the reply appeared completed, heated the crucible once more for another pentad minutes9.allowed crucible to cool for ten minutes10.measured the mass of the crucible, cover and magnesium oxideObservations:When ignited, the magnesium strip gave rack up a bright light. there was a colour change on the magnesium. It started out as silver and turned into a vacuous colour. The combustion gave off a distinct odour. The end result was a flannel powder but some magnesium had been left in its original shape. Individual Group ResultsTrial no.

Mass of Crucible and CoverMass of Crucible, cover and MgMass of Crucible, Cover and MgO133.8834.7735.12233.8834.7735.12333.9134.8035.15Class ResultsTria l zero(prenominal)Mass of Crucible and Cove! rMass of Crucible, cover and MgMass of Crucible, Cover and MgO436.6137.3934.83533.9134.6634.92633.5734.3434.28733.7934.5235.12832.8034.6134.83935.6136.3936.631032.8033.5734.37Analysis and rendering:Calculations1.Calculate the mass of the magnesium used. Mass = Mass of Crucible, cover and Mg ? Mass of Crucible and CoverTrial no 1 Mass = 34.77 ? 33.88= 0.89Trial none 2 Mass = 34.77 ? 33.88= 0.89Trial No. 3 Mass = 34.80 ? 33.91= 0.89Trial No. 4 Mass = 37.39 ? 36.61= 0.78Trial... If you want to get a innocent essay, order it on our website: OrderEssay.net

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