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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 complete, no more gas give off, allow the test tube to cool. While
the test tube is cooling test the gas in the collection bottle with glowing
splint. Caution: Do not leave the rubber tubing down in the water trough during
cooling or you will experience back-up. 5. After the test tube has
cooled weigh it on a balance. What is the change in mass?
Observations: Oxygen flowed from the test tube into the bottle of water, forcing
the water out...
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