Decomposition Purpose: In this lab we will observe the products of decomposition of potassium perchlorate (KClO4). We will then predict from our results the correct chemical reaction equation. Procedure: 1. Weigh out about 4.0g of KClO4 in a test tube. Record the accurate weight below. Product Weight Before Weight After Mass of Test tube + KClO4 41.5g 39.8g Mass of Test tube 37.5g 37.5 Mass of KClO4 4.0g 2.3g 2. Set up the apparatus shown below. 3. Gently heat the test tube containing the potassium perchlorate. Gas should begin to collect in the collection bottle. Record all observation. 4. Once the reaction is ....

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