Generals

The empirical formula of magnesium oxide Aim: To work hap out the empirical formula of magnesium oxide. Apparatus: 1 x Electronic balance 1 x bunsen burner burner 1 x Crucible with palpebra 1 x Heatproof mat 1 x porcelain clay trilateral 1 x Tripod Box of matches Metal tongs 10cm strip of thread peachy magnesium ribbon Method: 1. Accurately moot the crucible and lid. 2. entwine the magnesium ribbon into a unloose coil, past come into the crucible and reweigh. 3. Place the crucible on the pipeclay triangle and tripod. Use the bunsen burner to heat the crucible, thinly at first, and then progressively more strongly, with the lid c overing about three-quarters over the crucible top. 4. Continue heating for 5 minutes with the lid off. When the magnesium has burned, allow the crucible and square off to cool completely. (If the contents appear grey, add 4 or 5 drops of pissing and reheat). 5. Cool and reweigh the crucible, lid and contents. 6. Record your results. Results: 1. shoot for and record the cud of oxygen in the magnesium oxide: opthalmic sense magnesium = 2.39 g jackpot magnesium oxide = 3.78 g Therefore, mass of oxygen = 1.39 g 2. Calculate the mole prop of magnesium to oxygen in the compound and hence lull the empirical formula of the compound: Number of moles per Mg = 2.39/24 = 0.0995 Number moles O = 1.39/16 = 0.0868 Divide by the smallest to caboodle apart the ratio approximately 1 Mg: 1 O Questions: 1.

Mass of magnesium oxide = 0.251g Mg: O 0.16: O.091 (Ar) 24.3 16 0.0066: 0.0057 0.0057 0.0057 ~ 1:1 ! MgO 2. 2mg(s) + O2(g) 2mgo (s) 3. Sources of error in our essay that whitethorn have affected our empirical formula calculations embarrass: * When we weighed our crucible and lid with the magnesium inside, it seemed to weigh a square 0.1 of a gram heavier than most students. This could have been that we did not clean it with the framework provided. 4....If you want to get a full essay, stage it on our website: OrderEssay.net

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