Cabbage+Juice

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Video 1. A Cabbage Juice Indicator Video (Ryan C. with Rick M.- Videographer)

//- Be able to describe our experiment with cabbage juice as Ryan C. does here. -JT//

- [|Juice Diet]

-Definitions:
Red Cabbage Juice is a natural indicator, that helps determine whether a solution is an acid or base by the pH number. The pH changes when you add an acid or alkali to the solution. Another indicator is Litmus paper (red and blue) and this is also made from Cabbage juice. pH indicators." __sambal.co.uk__. 10 Nov 2006 . 22 Feb 2007 <[|http://www.sambal.co.uk/indicators.html>.]

Red cabbage juice is mixed with a series of buffers to obtain a set of color standards. Various household substances are added to red cabbage juice. By comparing the color of the resulting solution to that of the color standards, the approximate pH of the household materials is determined. "Cabbage Juice Indicator." __Teaching and Research Website__. 22 Feb 2007 <[|http://chemmovies.unl.edu/Chemistry/DoChem/DoChem099.html>.]

//- What colors does cabbage juice change to depending upon the alkalinity or acidity of the substance?// -JT

Unknown, "Anthocyanins." __Sci Network__. 11 Dec 2006. MadSci. 22 Feb 2007 <[|http://www.madsci.org/FAQs/anthocyanins.html>.]
 * __Anthocyanin__**- Any pigment or juice pH indicator that is found in nature, mainly in red/purple fruits and vegetables. Red cabbage juice is one type of anthocyanin, because it comes from a red/purple vegetable. On top of red cabbage juice, there are also beets, blueberries, cherries, raspberries, and purple grapes that have anthocyanins in their pigments/juices.

//- This is the natural pigment that changes color depending upon the acidity or alkalinity (if it is basic). - JT//

Unknown, Unknown. "Cabbage Juice: pH Indicator." __Cabbage Juice: pH Indicator__. Dec 11 2006. Mad Science Net. 22 Feb 2007 http://www.madsci.org/experiments/archive/859332497.Ch.html.
 * __Flavonoid-__** A flavonoid is a group of chemicals. Anthocyanin belongs to this group.

-Recipe
Below is a recipe for the red cabbage juice pH tester.

1) Take one cup of shredded red cabbage and boil it in two cups of water for 5 minutes in a non-aluminum pan. 2) Strain out the cabbage and keep water. The water should be purple. If it is any other color, throw this set away and try again. 3) Refrigerate any red cabbage juice that you do not use immediately. It will keep for up 2 days. Frozen cabbage juice can be kept for months. Johnson, Marian. "Indication For Acids and Bases." __SMILE__. 1 Feb 2007 . Illinois Institute of Technology. 22 Feb 2007 http://www.iit.edu/~smile/ch9310.html.

-Data:
All neutral solutions were purple after the cabbage juice was added. All of the acidic solution changed to pink after the cabbage juice was added. All of the basic solutions changed to green/blue after the cabbage juice was added.

Figure 1. Cabbage juice in beaker No author cited "<-CHM-107Lab Home Page", 2/22/2007 http://www.chemistryland.com/CHM107Lab/Lab1/PourCabbageJuiceIntoBeaker5.jpg

-Analysis:
Figure 2. Results of Cabbage Juice No author cited "Acids and Bases" 2/22/07 [|http://images.google.com/imgres?imgurl=http://wwwchem.csustan.edu/chem3070/images/cabbage.gif&imgrefurl=]

Figure 3. Cabbage Juice Colors No author cited "Great Science Projects from The Great Lakes Science Center." 22 Feb 2007. http://www.glsc.org/think/projects.php?id=21.

//- Observe the colors above and be familiar with them. -JT//

Figure 4. Pouring Cabbage Juice

No Author Cited, "Lab #1 Part 2." 3 Mar 2004. Chem-107- Home Page. 22 Feb 2007 <http://www.chemistryland.com/CHM107Lab/Lab1/Lab1PreparingCabbageExtract.htm

-Other natural pH indicators:
Beets Blackcurrant juice Blueberries Carrots Cherries Curry powder Delphinium petals Geranium petals Grapes Horse Chestnut leaves Hydrangea Morning Glories Onion Pansy petals Petunia petals Poison primrose Poppy petals Purple peonies Rayhan leaves Red cabbage juice Red radish Rhubarb Rose petals Strawberries Tea Thyme Turmeric Tulip petals Violet petals

juicing diet