pH%20of%20Common%20Substances%20and%20Compounds

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pH of Common Substances and Compounds
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Denise ArandiaMichelle ArmarioRaisa
CrisologoJoshua FernandezRyan Santos
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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.

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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.

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Procedure

• PART 2
• Determine the pH range of the various substances
  and mixtures suggested by the instructor.
• Feminine WashTearsBody WashSugarSpriteAlcohol

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Results
H3O (M) OH- (M) pH Color
1 x 10-1 1 x 10-13 1 Dark red
1 x 10-2 1 x 10-12 2 Red
1 x 10-3 1 x 10-11 3 Red orange
1 x 10-4 1 x 10-10 4 Orange
1 x 10-5 1 x 10-9 5 Yellow orange
1 x 10-6 1 x 10-8 6 Lighter yellow orange
1 x 10-7 1 x 10-7 7 Dark yellow
1 x 10-8 1 x 10-6 8 Yellow
1 x 10-9 1 x 10-5 9 Yellow green
1 x 10-10 1 x 10-4 10 Darker yellow green
1 x 10-11 1 x 10-3 11 Green
1 x 10-12 1 x 10-2 12 Blue
1 x 10-13 1 x 10-1 13 Dark blue/ purple
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Results
Substance/Mixture Observations pH Range
Feminine Wash Bubbly, yellow orange 5
Tears Dark green 11-12
Body Wash Bubbly, yellow orange 5
Sugar Yellow orange 7-8
Sprite Bubbly, light red 2-3
Acetone Red 1-2
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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)

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Applications
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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

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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.

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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.

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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.