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Prep Compounds and Formulas Lab

# Prep Compounds and Formulas Lab - Ryan O'Hearn Chemical...

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Ryan O’Hearn Chemical Principles I Lab - 1011.205.51 Experiment 4 – Preparation of Compounds and Determination of Formulas 09:42:16 Purpose Make two compounds and figure out their empirical formulas. First, we will create a reaction between metal, magnesium, and oxygen by heating strips of magnesium, which will combine with oxygen in the air. Also, make a solid out of two ions in water. Procedure See “Experiment 4: Preparation of Compounds and Determination of Formulas” Chemistry 205 Lab Manual Data Tables, Graphs Part A: Trial One Trial Two Crucible, Cover, Mg 21.491g 21.049g Crucible, Cover 21.109g 20.515g Mass Mg 0.382g 0.534g Crucible, Cover, Product 21.679g 21.0343g Mass Product 0.57g 0.828g Mass O 0.188g 0.294g Possible Formulas: Formula Grams Mg Grams O Grams Cmpd %Mg %O Mg 3 O 72.93 16.00 88.93 82.01 17.99 Mg 2 O 48.62 16.00 64.62 75.24 24.76 Mg 3 O 2 72.93 32.00 104.93 69.50 30.50 MgO 24.31 16.00 40.31 60.31 39.69 Mg 2 O 3 48.62 48.00 96.62 50.32 49.68 1

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Mg 3 O 5 72.93 80.00 152.93 47.69 52.31 MgO 2 24.31 32.00 56.31 43.17 56.83 Mg 2 O 5 48.62 80.00 128.62 37.80 62.20 MgO 3 24.31 48.00 72.31 33.62 66.38 Sample Calculations Finding Mass of Magnesium (Mg): Mass of Crucible, Cover and Mg – Mass of Crucible and Cover = Mass of Mg in grams 21.491g – 21.109g = 0.382 grams of Mg
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Prep Compounds and Formulas Lab - Ryan O'Hearn Chemical...

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