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Experiment 2C Identifying Elements, Compounds and Mixtures

Experiment 2C Identifying Elements, Compounds and Mixtures. Testing a Liquid. Boil the liquid and look for a residue after boiling. If a residue is present, the original sample was a_________________ If no residue, the sample could have been a _________________. NOTE:

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Experiment 2C Identifying Elements, Compounds and Mixtures

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  1. Experiment 2CIdentifying Elements, Compounds and Mixtures

  2. Testing a Liquid Boil the liquid and look for a residue after boiling. If a residue is present, the original sample was a_________________ If no residue, the sample could have been a _________________

  3. NOTE: There are only two liquid elements at room temperature: Mercury and Bromine

  4. Testing a Solid • Look for visual clues • Test with a magnet – If all magnetic, could be__________________________ • If some magnetic and some not, could be __________________________

  5. There are no elements that are white crystals or powders!! I am NOT an element! Neither am I!

  6. Try to dissolve sample in water • Filter. Look for a residue. Save the filtrate If a residue is found in the filter, there is a substance which doesn’t dissolve in water. Filtrate comes through the paper

  7. Evaporate a small sample of the filtrate and look for another residue after evaporation If a residue is found in the test tube after evaporation, there must be a substance that DID dissolve in water. If no residue is found, then maybe nothing dissolved in the water.

  8. If there was a residue in the paper, but not in the evaporated filtrate, then nothing dissolved. The sample could have been __________________________________________ If there was no residue in the paper, but a residue in the test-tube then all the sample dissolved. The sample could have been __________________________________________If there is one residue in the paper and another residue in the test-tube, the original sample must have been a ______________________________

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