Percentage of Oxygen in a Compound -

Percentage of Oxygen in a Compound - - Percentage of Oxygen...

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Percentage of Oxygen in a Compound – Stoichiometry/Catalysis Purpose: This experiment will review weighing techniques, stoichiometric relationships and will use stoichiometry to calculate the percent purity of a sample along with calculate the percent of oxygen in potassium chlorate. Introduction: The quantitative relationship among elements in a compound and among reactants is known as stoichiometry. Some compounds with oxygen can be decomposed by heat, such as potassium chlorate. Oxygen is given off and it can be calculated by difference. The reaction is very slow, but when you add manganese dioxide, it speeds up, so it is called a catalyst. Procedure: Obtain two clean and dry 25x200mm Pyrex test tubes and label them #1 and #2. To the first test tube add a pinch of MnO 2 , heat the test tube gently using a test tube clamp over a Bunsen burner to drive off surface moisture. Let it cool on a wire gauge to room temperature and weigh. This will be referred to as the weight of the test tube since
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Percentage of Oxygen in a Compound - - Percentage of Oxygen...

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