0
Turmeric (curcumine) remain yellow in acidic solutions.
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
Why would phenolpthalein not be a suitable indicator for the standardisation of hydrochloric acid with Borax?
Phenolphthalein is not suitable for titration involving Borax and hydrochloric acid because it changes color at a pH lower (usually around pH 8-9) than the equivalence point of this specific titration. Borax reacts as a weak base while hydrochloric acid is a strong acid, making the equivalence point acidic in nature. A suitable indicator would need to change color near this acidic pH of the equivalence point.
What is acid base indicator?
An acid base indicator is a chemical substance that has the ability to change color depending on the pH.
Why is the colour of the turmeric indicator yellow if the substance is acidic?
Turmeric is yellow in acidic solutions because the pigment curcumin changes its structure at low pH levels, making it absorb light in the visible spectrum that corresponds to yellow. This change in structure is reversible, which is why turmeric can be used as an acid-base indicator.
Why did clothes turn red when stained with turmeric and washed with soap?
The red color that appears when clothes stained with turmeric are washed with soap is due to a reaction between the alkaline pH of soap and the curcumin compound in turmeric. The curcumin changes its structure under alkaline conditions, resulting in a red color.
If phenolphthalein is added to HBr?
If phenolphthalein is added to HBr (hydrobromic acid), which is a strong acid, the phenolphthalein indicator will remain colorless because it only changes color in the presence of a base. Since HBr is an acid, it will not cause the indicator to change color.
How will you identify hydrochloric acid you have only turmeric indicator?
it turns red colour
What color when acid is put on turmeric indicator?
it turns yellow
How can you identify hydrochloric acid sodium hydroxide and sugar solution with the help of turmeric indicator?
Hydrochloric acid: yellow color Sodium hydroxide: brown color Sugar: unchanged
What is the color of the indicator when an excess of hydrochloric acid has been added?
The indicator turns pink when an excess of hydrochloric acid has been added in a titration.
What color would hydrochloric acid pH 1 turn universal indicator?
Hydrochloric acid at pH 1 would turn universal indicator red, indicating a strongly acidic solution.
What is the colour with universal indicator hydrochloride acid in stomach?
Universal indicator changes color to red in the presence of hydrochloric acid in the stomach, indicating a low pH.
What effect does hydrochloric acid have on universal indicator paper?
Hydrochloric acid will typically turn universal indicator paper red, indicating a low pH or acidity. Universal indicator paper changes color based on the pH of the solution it comes into contact with, with red indicating a strong acid.
What colour does universal indicator turn in dilute hydrochloric acid?
Universal indicator will turn red or pink in dilute hydrochloric acid.
What colour does universal indicator change to Hydrochloric acid is added?
Universal indicator changes to red/orange when hydrochloric acid is added, indicating that the solution is acidic.
What is the reactions of hydrochloric acid to methyl orange?
Hydrochloric acid is an acid, so it reacts with methyl orange, which is a pH indicator. When added to hydrochloric acid, methyl orange turns red due to the low pH of the acid. This color change indicates the presence of an acidic solution.
What is the reaction of turmeric with hydrochloric acid?
If it is adulterated a black colour will be formed :D
Why is bromocresol green a suitable indicator in the titration of hydrochloric acid with sodium tetraborate?
Bromocresol green changes color in the pH range of 3.8 to 5.4, which is close to the pH at the endpoint of the titration of hydrochloric acid with sodium tetraborate. This makes it a suitable indicator for this titration as it changes color around the equivalence point.
