What are the six indicators in chemistry?

Answer 1

In science indicators are used for seeing weather a liquid is either a stong acid or alkailine or a week acid or aklaline or it can be neutral which is neither. You can check what it is by using a pH Scale.

Answer 2

In chemistry, an indicator can refer to one of a few things:

• pH indicator, a chemical detector for protons in acid-base titrations
• Redox indicator, a chemical detector for redox titrations
• Complexometric indicator, a chemical detector for metal ions in complexometric titrations
• Zeta potential, a property of interfaces in fluids for Zeta potential titration

The most common usage is generally as a pH indicator. Synthetic indicators include:

• Gentian violet (Methyl violet) - Turns yellow to blue-violet
• Leucomalachite green (first transition) - Turns yellow to green
• Leucomalachite green (second transition) - Turns green to colorless
• Thymol blue (first transition) - Turns red to yellow
• Thymol blue (second transition) - Turns yellow to blue
• Methyl yellow - Turns red to yellow
• Bromophenol blue - Turns yellow to purple
• Congo red - Turns blue-violet to red
• Methyl orange - Turns red to orange
• Bromocresol green - Turns yellow to blue-green
• Methyl red - Turns red to yellow
• Methyl red / Bromocresol green - Turns red to green
• Azolitmin - Turns red to blue
• Bromocresol purple - Turns yellow to purple
• Bromothymol blue - Turns yellow to blue
• Phenol red - Turns yellow to red
• Neutral red - Turns red to yellow
• Cresol Red - Turns yellow to reddish-purple
• Phenolphthalein - Turns colorless to fuchsia
• Thymolphthalein - Turns colorless to blue
• Alizarine Yellow R - Turns yellow to red

Many plants or plant parts contain chemicals from the naturally-colored anthocyanin family of compounds. This would include litmus paper, which is a water-soluble mixture of different dyes extracted from lichens, especially Roccella tinctoria. They are red in acidic solutions and blue in basic. Extracting anthocyanins from red cabbage leaves or the skin of a lemon to form a crude acid-base indicator is a popular introductory chemistry demonstration.

Anthocyanins can be extracted from a multitude of colored plants or plant parts, including from leaves (red cabbage); flowers (geranium, poppy, or rose petals); berries (blueberries, blackcurrant); and stems (rhubarb).

Answer 3

A chemical indicator is a substance that indicates the absence or presence of certain compounds.

It is a material that changes color in the presence of an alkali and an acid. It is a safe way to find out if a chemical substance is basic or acidic.

Answer 4

An indicator is a chemical which will give a signal when a certain pH level is reached. Nearly always color, most indicators will change color, sometimes drastically, sometimes on a scale, on a certain range of pH. Most indicators work well either in an acidic or basic environment, but some are more universal.

Answer 5

Indicators are used to determine whether the solution is acidic, basic or neutral.

• Litmus- Blue litmus turns red in acid and red litmus turns blue in base.
• Phenolphathelein- It is colourless in acid and neutral and pink in base.
• Methyl Orange- It turns red in acid, orange in neutral and yellow in base.
• Red Cabbage juice turns red in acid and green in base.
• Turmeric Juice remains yellow in acid and neutral but turns reddish brown in base.

Answer 6

halochromic chemical compound that is added in small amounts to a solution so that the pH (acidity or basicity) of the solution can be determined visually.

Answer 7

Some indicators are: methyl orange, thymol blue, Congo red, bromcresol green, phenolphthalein, alizarine yellow R.

Answer 8

tamarind,litmus paper,methyle orange