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pH Lab- Lab Report - the same substance and touch it to the...

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pH Lab Mitchell T. Heaton Objective: To determine the different pH levels of various liquids and their H 3 O + concentrations. Hypothesis: The majority of the substances will be acids except for coffee, bleach, and diet Pepsi. Materials: 10 Test tubes 1 Milliliter of coffee 1 Milliliter of tea 1 Milliliter of diet Pepsi 1 Milliliter of ammonia 1 Milliliter of vinegar 1 Milliliter of Listerine mouthwash 1 Milliliter of water 1 Milliliter of bleach 1 Milliliter of sodium hydroxide 1 Milliliter of hydrochloric acid 1 Glass stirring rod 1 Test tube rack 10 Strips of red litmus paper 10 Strips of blue litmus paper 10 Strips of pH paper Methods: 1. Fill a different test tube with one milliliter of each chosen substance. 2. Tape down in groups of three, one strip of red litmus paper, one strip of blue litmus paper, and one strip of pH paper. 3. Dip the glass stirring rod into the first substance and touch it to the red litmus paper. Record the result. Dip the glass stirring rod into the same substance and touch it to the blue litmus paper. Record the result. Dip the glass stirring rod into
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Unformatted text preview: the same substance and touch it to the pH paper. Record the pH level. 4. Wash off the stirring rod and repeat step three for a different substance until you have done so for each substance, washing the stirring rod each time you change substances. *Be quick to record the results for the liquid bleach because it will bleach the litmus paper and null the results within seconds. Results: See chart on page 19. Conclusion: The substances that are acids have increased concentration levels of H 3 O + and decreased concentration levels of OH-. The substances that are bases have increased concentration levels of OH-and decreased concentration levels of H 3 O + . The substances that are bases have a pH level greater than 7 and change the red pH Lab Mitchell T. Heaton litmus paper blue. The substances that are acids have a pH level less than 7 and change the blue litmus paper red....
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