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Why neutralize alcohol with phenolpthalein?
Phenolphthalein is used as an acid-base indicator to determine the endpoint of a titration between a strong base and a weak acid when neutralizing alcohol. The pink color change indicates that all the weak acid has reacted with the strong base, allowing for accurate titration.
What color does phenolpthalein turn in the presenc of an acid?
Phenolphthalein only gives colour to bases with a pH above approximately 8.2-10. Then it gives a pink colour. As HCL is a strong acid it becomes colourless.
Why is phenolpthalein used as the indicator for the assay of tartaric acid?
Phenolphthalein is used as an indicator during the titration of tartaric acid because the pH at which phenolphthalein changes color (around pH 8.2-10) is close to the equivalence point of the titration of tartaric acid with a strong base like NaOH. This makes it a suitable indicator for detecting the endpoint of the titration when the acid has been completely neutralized by the base.
What colour would a mixture of thymol blue and phenolpthalein when adding sodium hydroxide?
The color of the mixture would depend on the specific concentrations and pH levels. Thymol blue transitions from yellow to blue with increasing pH, while phenolphthalein transitions from colorless to pink. It's likely that the mixture would show a combination of both yellow/blue and colorless/pink depending on the pH range reached with sodium hydroxide.
WHAT color do you get when a neutral substance is mixed with litmus?
It's purple the colour can change slightly. isn't that just great purple it's my favourite colour ya know
What turn phenolpthalein colorless?
acids or neutral substances
What is the reaction of phenolpthalein on acid and base?
make it useful for testing for signs of carbonation reactions in concrete
What colors do litmus paper and phenolpthalein turn in presence of an acid or of base?
Litmus paper: red color in acidic solutions and blue color in basic solutions.Phenolphthalein: no color in acidic solutions.
Why neutralize alcohol with phenolpthalein?
Phenolphthalein is used as an acid-base indicator to determine the endpoint of a titration between a strong base and a weak acid when neutralizing alcohol. The pink color change indicates that all the weak acid has reacted with the strong base, allowing for accurate titration.
What is the advantage of using pHydrion paper rather than bromthymol blue or phenolpthalein?
pHydrion paper gives you an actual pH level rather than if it's an acid or base.
What color does phenolpthalein turn in the presenc of an acid?
Phenolphthalein only gives colour to bases with a pH above approximately 8.2-10. Then it gives a pink colour. As HCL is a strong acid it becomes colourless.
Why is phenolpthalein used as the indicator for the assay of tartaric acid?
Phenolphthalein is used as an indicator during the titration of tartaric acid because the pH at which phenolphthalein changes color (around pH 8.2-10) is close to the equivalence point of the titration of tartaric acid with a strong base like NaOH. This makes it a suitable indicator for detecting the endpoint of the titration when the acid has been completely neutralized by the base.
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 the color of phenolphthalein in solutions with pH values ranging from 2 to 6?
Phenolphthalein is colorless in acidic solutions with a pH below 8, and turns pink in basic solutions with a pH above 8. In solutions with pH values ranging from 2 to 6, phenolphthalein would remain colorless.
What colour would a mixture of thymol blue and phenolpthalein when adding sodium hydroxide?
The color of the mixture would depend on the specific concentrations and pH levels. Thymol blue transitions from yellow to blue with increasing pH, while phenolphthalein transitions from colorless to pink. It's likely that the mixture would show a combination of both yellow/blue and colorless/pink depending on the pH range reached with sodium hydroxide.
Can phenolpthalein solution be used to prove that toothpaste is a base?
Phenolphthalein changes from colorless to pink in the range of pH 8.2 - 10. If toothpaste has a pH that is below this range, phenolphthalein will not indicate the basicity. if the pH is higher, which I believe it is in most (some) toothpastes, then phenolphthalein can be used, because it will turn from colorless to pink.
WHAT color do you get when a neutral substance is mixed with litmus?
It's purple the colour can change slightly. isn't that just great purple it's my favourite colour ya know
