What color does purple cabbage turn when it is acid, what color does it turn when it is alkaline? Wh

Purple cabbage water is an indicator, which will turn red when exposed to acid and turn green when exposed to alkali, which can identify the acidity and alkalinity of the substance.

It is purple in water.

When the alkaline surface turns green, I don't know.

Summary. Hello, it's the chemistry. In fact, not only purple cabbage juice, petals and some leaves can be used to do acid-base indication, its main color component is anthocyanin, which is an amphoteric nonionic surfactant, but also a dye, anthocyanin side becomes red when it encounters acidity, and turns blue when it encounters alkaline, its homologues and gardenia pigments that are common in our natural food pigments (gardenia blue and gardenia red), as well as anthocyanin glycosides encounter sodium hypochlorite and other strong oxidizing "bleaching" significant discoloration (chromogenic groups are redoxed) at the time of solvents, and so on.

Hello, may I ask purple cabbage juice as an acid-base indicator, is it a chemical reaction that turns red when it meets vinegar and turns green when it meets alkali?

Please wait a few minutes.

Hello, it's the chemistry. In fact, Li Shushou is not only purple cabbage juice, petals and some leaves can be used to do acid-base indication, its main color component is anthocyanin, is an amphoteric nonionic surfactant, but also a dye, anthocyanin side when it encounters acidity, when it encounters alkaline, it turns blue, its homologues and our natural food pigments which are common gardenia pigments (gardenia blue gardenia red **), and anthocyanin glycosides encounter sodium hypochlorite and other strong oxidation and cherry "bleaching" significant discoloration (chromogenic groups are redoxed) at the time of solvents, and so on.

Purple cabbage juice can be used as an acid-base indicator, it turns red when it encounters acid, it turns blue when it encounters alkali, and after adding vinegar, the solution is acidic, so it turns red; Add baking soda or alkaline surface to the aqueous solution to talk about alkaline resistance, which can be neutralized with acid, and the solution becomes neutral and returns to the original color of the previous commetic; If there is too much aqueous solution of baking soda or alkaline surface with the spring fruit, the solution will be alkaline and turn blue.

Purple cabbage water and alkaline water.

It will turn green, and it will be red with acidic substances, both because purple cabbage has acid-base indicator substances like litmus reagent, which turn red when exposed to acid and green when exposed to alkali.

pH The color of the purple cabbage juice display.

7 9 Blue.

10 11 Green.

12 14 Yellow.

Purple cabbage. Purple cabbage, also known as red cabbage, red cabbage, commonly known as purple cabbage, is a variant of the Brassica oleraceae species, and is a type of cabbage. The leaves of purple cabbage are purple-red, the leaf surface has wax powder, and the leaf bulbs are nearly round.

The nutritional content of purple cabbage includes carbohydrates.

Protein, folic acid, ascorbic acid.

Vitamins such as vitamin A and tocopherol, minerals such as copper, iron, selenium, calcium, manganese, and zinc.

The main characteristic of purple cabbage is the anthocyanins in the leaves.

The content or proportion is higher.

It originated in the Mediterranean Sea.

Coastal, adaptable, high yield, is currently cultivated in most parts of our country. Purple cabbage** is inexpensive and has a shelf life.

It is long and not easy to spoil, and has become one of the common dishes on the table.

Two-year-old herb, powdered. Short and stout annual stems are fleshy, unbranched. basal leaves numerous, thick, layered into globules, oblate spherical, 10-30 cm in diameter or larger; The biennial stem is branched and has stems and leaves.

Basal leaves and lower stems oblong-obovate to rounded, up to 30 cm long and wide. apex rounded, base abruptly narrowed into a very short petiole with broad wings, margins wavy and inconspicuously serrate; The upper stem has ovate or oblong-ovate leaves, and the base holds the stem. The leaf surface of purple cabbage is waxy, and the leaf bulbs are spherical.

It will turn green with alkaline water, and red with acidic substances, both because purple cabbage has acid-base indicator substances like litmus reagent, which turn red when exposed to acid and green when alkalin.

pH The color of the purple cabbage juice display.

9 Blue. 10 11 Green.

12 14 Yellow.

Because purple cabbage is very rich in anthocyanins, it can be used to make acid-base indicators, and white vinegar, water, and baking soda are acidic, neutral and alkaline substances respectively.

Hello, it is a pleasure to serve you and give you the following answer: Purple cabbage juice turns gray when exposed to carbonaceous substances. Reason:

Purple cabbage juice contains a substance called anthocyanins, which are a very stable pigment, but when it encounters carbonaceous substances, it reacts and turns anthocyanins gray. Workaround:1

Avoid exposing purple cabbage juice to carbon-based substances, and if unavoidable, use non-carbon-evoking substances instead. 2.Store the purple cabbage juice and carbonaceous substances separately to avoid reactions.

3.Adding a small amount of acidic substance, such as lemon juice, to the purple cabbage juice can prevent the purple cabbage juice from reacting with carbonaceous substances. Personal Tips:

1.When using purple cabbage juice, contact with carbonaceous substances should be avoided as much as possible to avoid reactions. 2.

If it is unavoidable, a non-carcoal substance can be used instead, or the purple cabbage juice and carbonaceous substance can be stored separately to avoid reactions. 3.Adding a small amount of acidic substance, such as lemon juice, to the purple cabbage juice prevents the purple cabbage juice from reacting with carbon and billowing dust.

It should be blue when it is alkaline and red when it is acidic.

Three is just a big brother, more or less three lives three lives try.

The acidic and alkaline solution of purple cabbage water is colored

Purple cabbage: red (acidic) purple (medium) green (alkali) Discolored purple cabbage is dark purple in water.

Purple cabbage is red in white vinegar.

Purple cabbage is blue in a soda ash solution.

Purple cabbage is blue-purple in an edible salt solution.

Purple cabbage is green in soapy water.

Purple cabbage is blue-purple in distilled water.

The range of discoloration of the purple cabbage indicator is as follows:

pH< pink.

7 07 58 5ph> yellow.