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PH of Common Substances and Compounds. Denise Arandia Michelle Armario Raisa Crisologo Joshua Fernandez Ryan Santos.

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Presentation on theme: "PH of Common Substances and Compounds. Denise Arandia Michelle Armario Raisa Crisologo Joshua Fernandez Ryan Santos."— Presentation transcript:

1 pH of Common Substances and Compounds

2 Denise Arandia Michelle Armario Raisa Crisologo Joshua Fernandez Ryan Santos

3 Introduction What is pH? A measurement used in order to indicate whether a substance/mixture is acidic or basic. The negative logarithm of the hydrogen ion concentration.

4 Procedure PART 1: Number the test tubes from 1-13. Add 5 mL of each solution to each test tube. Test Tube 1: Most concentrated acid Test Tube 7: 0.01M NaCl solution Test Tube 8: Least concentrated base. Add a few drops of indicator solution and observe the results.

5 Procedure PART 2: Determine the pH range of the various substances and mixtures suggested by the instructor. Feminine Wash Tears Body Wash Sugar Sprite Alcohol

6 Results [H 3 O + ] (M)[OH - ] (M)pHColor 1 x 10 -1 1 x 10 -13 1Dark red 1 x 10 -2 1 x 10 -12 2Red 1 x 10 -3 1 x 10 -11 3Red orange 1 x 10 -4 1 x 10 -10 4Orange 1 x 10 -5 1 x 10 -9 5Yellow orange 1 x 10 -6 1 x 10 -8 6Lighter yellow orange 1 x 10 -7 7Dark yellow 1 x 10 -8 1 x 10 -6 8Yellow 1 x 10 -9 1 x 10 -5 9Yellow green 1 x 10 -10 1 x 10 -4 10Darker yellow green 1 x 10 -11 1 x 10 -3 11Green 1 x 10 -12 1 x 10 -2 12Blue 1 x 10 -13 1 x 10 -1 13Dark blue/ purple

7 Results Substance/MixtureObservationspH Range Feminine Wash Bubbly, yellow orange 5 TearsDark green11-12 Body Wash Bubbly, yellow orange 5 SugarYellow orange7-8 SpriteBubbly, light red2-3 AcetoneRed1-2

8 Conclusion Indicator Dye that changes color Acid-base Weak organic acids (different colors from their conjugate bases) Range of hydrogen ions Phenolphtalein pH measured with pH meter (numerical value)

9 Applications

10 Aquariums Some fish can only live in a certain range of pH leve of water. An ideal pH for goldfish to live safely is 6.6-8.4 Some fish can only live in a certain range of pH leve of water. An ideal pH for goldfish to live safely is 6.6-8.4

11 Commercial Products Liquid soap usually has a pH level of 6-10. Having a high pH level makes the soap more anti-bacterial. Shampoo has a slightly acidic pH level since a more basic environment weakens the hair.

12 Plants The ideal pH living conditions for common fruits and vegetables is around 4.5-7.5. Using limestone could increase the pH level of soil while using aluminum sulfate can lower pH levels.

13 Marine Life Corals are very sensitive to the pH of the seawater. They only survive in 8.3- 8.5 pH. If the pH of the seawater drops or increases, the corals would eventually die.


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