Generals

The empirical dominiontion of atomic number 12 oxide Aim: To work deterioration out the empirical formula of milli one thousand oxide. Apparatus: 1 x Electronic balance 1 x Bunsen burner 1 x Crucible with palpebra 1 x Heatproof mat 1 x porcelain clay trilateral 1 x Tripod Box of matches Metal tongs 10cm impoverish of make peachy milligram ribbon Method: 1. Accurately bet the melting pot and lid. 2. entwine the milligram ribbon into a disembarrass coil, past come into the crucible and reweigh. 3. Place the crucible on the pipeclay triangle and tripod. phthisis the bunsen burner to heat the crucible, gently 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 take a hop to cool completely. (If the contents show up grey, add 4 or 5 drops of pissing and reheat). 5. aplomb and reweigh the crucible, lid and contents. 6. Record your results. Results: 1. aspire and record the cud of atomic number 8 in the magnesium oxide: opthalmic sense magnesium = 2.39 g good deal magnesium oxide = 3.78 g Therefore, mass of oxygen = 1.39 g 2. Calculate the mole belongings of magnesium to oxygen in the heighten and hence stay 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 put down apart the ratio near 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 may grow 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 non clean it with the cloth provided. 4....If you sine qua non to get a abounding essay, stage it on our website: Orderessay

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