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 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 [H3O+] (M) [OH-] (M) pH Color 1 x 10-1 1 x 10-13 1 Dark red2
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 7
Dark yellow 8
Yellow 9
Yellow green 10
Darker yellow green 11
Green 12
Blue 13
Dark blue/ purple

7. Results Substance/Mixture Observations pH Range Feminine Wash
Bubbly, yellow orange 5
Tears
Dark green
11-12
Body Wash
Sugar
Yellow orange
7-8
Sprite
Bubbly, light red
2-3
Acetone
Red
1-2

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

11. Commercial Products
Liquid soap usually has a pH level of 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 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 pH. If the pH of the seawater drops or increases, the corals would eventually die.