pH of Common Substances and Compounds
pH of Common Substances and Compounds
Denise ArandiaMichelle ArmarioRaisa Crisologo
Joshua FernandezRyan Santos
Denise ArandiaMichelle ArmarioRaisa Crisologo
Joshua FernandezRyan Santos
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.
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.
Procedure
PART 2:
Determine the pH range of the various substances and mixtures suggested by the instructor.
Feminine WashTearsBody WashSugarSpriteAlcohol
Results
[H3O+] (M) [OH-] (M) pH Color1 x 10-1 1 x 10-13 1 Dark red1 x 10-2 1 x 10-12 2 Red1 x 10-3 1 x 10-11 3 Red orange1 x 10-4 1 x 10-10 4 Orange1 x 10-5 1 x 10-9 5 Yellow orange1 x 10-6 1 x 10-8 6 Lighter yellow
orange1 x 10-7 1 x 10-7 7 Dark yellow1 x 10-8 1 x 10-6 8 Yellow1 x 10-9 1 x 10-5 9 Yellow green1 x 10-10 1 x 10-4 10 Darker yellow
green1 x 10-11 1 x 10-3 11 Green1 x 10-12 1 x 10-2 12 Blue1 x 10-13 1 x 10-1 13 Dark blue/
purple
ResultsSubstance/Mixture
Observations pH Range
Feminine WashBubbly, yellow
orange5
Tears Dark green 11-12
Body WashBubbly, yellow
orange5
Sugar Yellow orange 7-8
Sprite Bubbly, light red 2-3
Acetone Red 1-2
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)
ApplicationsApplications
AquariumsAquariumsSome 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
Commercial Products
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.
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.
PlantsPlantsThe 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.
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.
Marine LifeMarine LifeCorals 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.
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.