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Red cabbage powder is a natural acid-base indicator. It contains a compound that changes color when exposed to varying concentrations of hydrogen and hydroxide ions. When citric acid and water are added to the powder, the hydrogen ions from the acid interact with a chemical in the red cabbage powder, giving it a purple color.

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15y ago
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2w ago

Red cabbage contains a pigment molecule called anthocyanin that changes color depending on the pH of its environment. When citric acid is added, it lowers the pH of the solution, causing the molecule to change from a blue color to a purple one.

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Q: Why does red cabbage powder and water turn purple when citric acid is added?
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What happens when sodium hydroxide is added to red cabbage juice?

When sodium hydroxide is added to red cabbage juice, the cabbage juice will change color. The cabbage indicator will turn from red/pink to blue/purple because sodium hydroxide is a strong base, causing a shift in the pH of the solution. This color change is due to the anthocyanin molecules in the red cabbage juice reacting with the change in acidity.


An indegestion powder contains sodium hydrogencarbonate and a small amount of citric acid. the powder starts to fizz when it is added to water. what gas is given off when the mixture fizzes?

Carbon dioxide gas is given off when the indigestion powder containing sodium hydrogen carbonate and citric acid is added to water. This reaction produces effervescence and helps relieve indigestion symptoms by neutralizing excess stomach acid.


What color does an acid turn if red cabage indacator is added?

An acid will turn the red cabbage indicator red, pink, or magenta in color. This change occurs because the anthocyanin pigments in the cabbage react with the acidic solution, causing a color change.


When citric acid is added will the pH increase or decrease?

When citric acid is added, or any acid for that matter, the pH of a substance will decrease. This is because since acids have a low pH they will decrease the pH of other substances when added to it.


Can citric acid not dissolve with water or it will?

Citric acid can dissolve in water. When citric acid is added to water, it dissociates into ions, increasing its solubility in the water.

Related questions

What happens when a base is added to red cabbage solution?

Base turn red cabbage solution to blue-ish purple


What color does cabbage juice change to when sprite is added?

When adding tomato juice to cabbage juice, the cabbage juice turns redish


Why is citric added to juice drink preparation?

Citric acid is added for tartness.


An indegestion powder contains sodium hydrogencarbonate and a small amount of citric acid. the powder starts to fizz when it is added to water. what gas is given off when the mixture fizzes?

Carbon dioxide gas is given off when the indigestion powder containing sodium hydrogen carbonate and citric acid is added to water. This reaction produces effervescence and helps relieve indigestion symptoms by neutralizing excess stomach acid.


Why is citric acid added to juice drink preparations?

Citric acid is added to juice drink preparations to enhance the flavor of the juice by providing a tart and tangy taste. It also acts as a natural preservative, helping to extend the shelf life of the juice by inhibiting the growth of bacteria and mold. Additionally, citric acid helps to balance the sweetness in the juice by providing a contrasting flavor profile.


What color does an acid turn if red cabage indacator is added?

An acid will turn the red cabbage indicator red, pink, or magenta in color. This change occurs because the anthocyanin pigments in the cabbage react with the acidic solution, causing a color change.


What is red cabbage?

Red cabbage is one of many varieties of cabbage grown in temperate regions worldwide. Its juice contains the pigment cyanidin, which is used as a homemade indicator of acids and alkalies because it turns the purple colored juice pink when an acid is added and blue when mixed with an alkali (or colorless in a strong alkali solution).


Can citric acid not dissolve with water or it will?

Citric acid can dissolve in water. When citric acid is added to water, it dissociates into ions, increasing its solubility in the water.


When citric acid is added will the pH increase or decrease?

When citric acid is added, or any acid for that matter, the pH of a substance will decrease. This is because since acids have a low pH they will decrease the pH of other substances when added to it.


If you add coke to red cabbage juice what color will it turn?

Red cabbage juice will turn pink when an acid is added to it. Due to the acids in a carbonated drink, 7up till turn the juice a pink colour.


What color does red cabbage juice turn salt when added?

no it reacts only with rainbow cabbage juice and not red


Is citric acid in cheese?

Some cheeses have citric acid added to them to improve the melting qualities of the cheese. Quick Mozzarella is a classic example of this. Many Processed cheeses have citric acid in them to give a smooth melting cheese.