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Red Cabbage Essay

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Below is an essay on "Red Cabbage" from Anti Essays, your source for research papers, essays, and term paper examples.

Red Cabbage Indicator Lab
The objective of this lab is to determine the approximate pH of household solutions by using a red cabbage as an indicator solution.
A red cabbage contains a pigment molecule that is called flavin. When placed in very acidic solutions, the anthocyanin in the flavin will turn a reddish color. In neutral solutions, the color stays purple. In basic solutions, the solution will turn greenish-yellow. The color of the solution changes in response to the changes in the hydrogen ion concentration. The equation for pH is pH=-log[H+]. A pH indicator measures whether a substance, usually a liquid, is acidic or basic. When the indicator comes in contact with the substance, the indicator’s color corresponds to the substance’s approximate change.

If I test the pH of household items with the red cabbage, then the solution will undergo a physical change.

Household Liquid | Color Guess | Approximate pH Guess |
Apple Cider Vinegar | Purple | 3 |
Mouthwash | Green | 9 |
Baking Soda | Green | 11 |
Cream of Tartar | Red | 2 |
Detergent | Violet | 6 |
Lemon Juice | Red | 2 |
Denture Cleaner | Blue | 8 |

  * (1) Red/Purple Cabbage
  * Boiling Water
  * Pan
  * Strainer
  * Large Container
  * 7 Bowls or Cups
  * Spoons
  * Lemon Juice
  * Apple Cider Vinegar
  * Mouthwash
  * Cream of Tartar
  * Baking Soda
  * Detergent
  * Denture Cleaner Tablet

  1. Cut and dice about half of the cabbage and place into a pan with water.
  2. Heat the water until it boils and creates a purple liquid.
  3. Strain the cabbage and place liquid in a container.
  4. Label the 7 cups/bowls with the liquid you will place in it. (Ex: Vinegar, Lemon Juice, etc.)
  5. Pour about ¼ cup of each liquid into the respective cup except for the cream of tartar, and the baking soda.
  6. For the baking soda, add about a spoonful of water to the powder and mix...

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"Red Cabbage". Anti Essays. 17 Dec. 2018


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