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Indicactor Lab - Online Essay

Indicactor Lab

What is in each test-tube? What proof do I have of this?
Test-tube A: Test-tube A had water in it. I can base this on the fact that it was a neutral, reacting neither to red or blue litmus paper. Phenolphthalein also did not react to this substance. The pH value was 7, neutral, also adding to the proof that this substance was water, because water is neutral. The substance was clear and odorless, and all of these reactions combined led me to my conclusion of substance A being water.
Test-tube B: Test-tube B had spoiled milk in it. The substance reacted to blue litmus paper, and red litmus paper underwent no change. Phenolphthalein did not change, and the pH value was 6, a weak acid. The ...

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D: Test-tube D contained lemonade. The substance reacted to blue litmus paper, and red litmus underwent no changes. It had no effect on Phenolphthalein, and its pH value was 3, a strong acid. Knowing that lemons are very acidic, and that the substance was yellow and sweet smelling, I concluded that substance D was lemonade.

Test-tube E: I could not come to a conclusion on what substance E was. It reacted weakly to blue litmus paper, and it did not change red litmus. It had no effect on Phenolphthalein, but its pH value tested as 7. This cannot be correct however, because all acids have a pH value less than 7. The appearance and smell were not of any help, because it was a clear substance with a slight odor I couldn’t key in on. So my conclusion is that this substance was an extremely weak acid of some sort.

Test-tube F: Test-tube F contained sodium hydroxide. The substance had a very strong reaction to red litmus and no reaction to blue litmus paper. It had a very strong ...

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Indicactor Lab. (2004, December 21). Retrieved November 23, 2024, from http://www.essayworld.com/essays/Indicactor-Lab/19314

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PAPER DETAILS

Added: 12/21/2004 12:15:15 PM
Category: Science & Nature
Type: Premium Paper
Words: 430
Pages: 2

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