Empirical Formula PRE LAB

Materials and Equipment: Equipment: Crucible Crucible Tongs Clay Triangle Ring Stand w/ Clamps Bunsen Burner Electronic Balance Wire Gauze Scissors Materials: ; Soapy Water ; Magnesium Ribbon Safety: Be cautious with hot crucibles and crucible covers as they can cause burns who en in contact with skin. To avoid coming in contact with hot materials, tie back long hair and sec ere loose clothing. Wear an apron, goggles, and closed toed shoes while performing the lab to pr detect from falling chemicals, glass, etc.

Finally, while performing the lab, keep Magnesium away from open flames at all times. Procedure: . Refer to handout Rest Its: Data Table Mass (g) Crucible+magnesium Crucible + Magnesium oxide 23. 4433 23. 7018 23. 8894 Observations: 1 . Clay triangle and crucible glow red when heated by Bunsen burner. 2. While being strongly heated, MGM appears powdery and white, like ashes. 3. At 6 minutes of strong heat, some of the MGM begins to turn red. 4. After being strongly heated for ten minutes, the MGM leaves a white residue in t he crucible.

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Lab Questions: The masses (in grams) of the magnesium used and oxygen reacted are not in he same ratio as the ratio Of moles Of magnesium to moles Of oxygen. The molar ratio of magnesium and oxygen is 1 making the compound’s formula, MGM. The La w of Definite Proportions states that a chemical compound always contains exactly the same proportion of elements by mass. The ratios of molar mass are 24. 30 g/ mol of Magnesium and 16. 00 g/ mol of Oxygen. When these are divided to find simple ratio, the ratio becomes 1. 5 grams of Magnesium to 1 gram of Oxygen, making the ratio oft he mass of