Red Diet programs Juice Ph level Indicator

16-3

Reddish colored Cabbage Juice pH Sign

Sources: Prof. George Ewing's C100 Exhibition Notes; Prof. Carolyn Huffman's Fall '93 C100 address; B. Unces. Shakhashiri, 1989, Chemical Demos: A Handbook for Instructors of Hormone balance, vol. several, pp 162-166.

Description and Concept: Red cabbage drink will change to a variety of colors when included in solutions of various pH. Red cabbage juice is a pH indicator.

Materials:

red cabbage*

blender

warm or boiling water

filter newspaper (coffee filtration work well)

1 liter beaker

Six 250 milliliters beakers

Professors/Instructors please specify which chemical compounds you wish to employ. Some we may have on hand are: household freezing mixture (NH3)

the baking soda (sodium bicarbonate, NaHCO3)

washing soda (sodium carbonate, Na2CO3)

" lemon " juice (citric acid, C6H8O7)

vinegar (acetic acid, CH3COOH)

cream of tartar (Potassium bitartrate, KHC4H4O6)

Other household items that can be used include:

antacids (calcium carbonate, calcium hydroxide, magnesium hydroxide... ), seltzer water (carbonic acid, H2CO3),

muriatic chemical p or masonry's cleaner (hydrochloric acid, HCl), or lye (potassium hydroxide, KOH or perhaps sodium hydroxide, NaOH).

Safety:

Hydrochloric acidity and Salt Hydroxide happen to be strong irritants.

You should wear safety safety glasses and disposable gloves for this demo, especially if you choose to use HCl and NaOH.

Procedure:

Slice cabbage in small parts.

Put cabbage in a few liter beaker and then cover with hot water, let are a symbol of 10 minutes or even more (the more you wait a lot more potent the indicator). OR PERHAPS

Set about two cups of cabbage within a blender, cover with hot water, and mixture. Filter out the rose material to find the red-purple-bluish coloured liquid. This kind of liquid reaches about pH 7.

Pour about 50 - 100 multiple listing service of your red cabbage indication into every single 250 mL beaker. Put your sign to various home solutions till you see a color change. For example: Hydrogen will switch...

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