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it is a agar medium for Microbiology containing phenolphthalein biphosphate. It is used in Petri plates and detects the phosphatase character of microbial colonies but requires final addition of alkali to color the phenolphatlein and the color rapidly fades.
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∙ 11y ago
Phenolphthalein is a chemical compound commonly used as a pH indicator in laboratory experiments. It changes color in response to acidic or basic conditions, making it useful for determining the acidity or alkalinity of a solution. It is often colorless in acidic solutions and pink to magenta in basic solutions.
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∙ 14y agoAn acid-base indicator which produces no color in an acid solution but turns pink or red in an alkaline solution. Also used as a laxative.
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∙ 15y agoAn indicator used in titration to test basicity. An indicator used in titration to test basicity.
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∙ 13y agoPhenolphthalein solution is a synthetic indicator. Indicators are used to find out whether a solution is acidic or basic.
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∙ 9y agoph indicator for cell cultures
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Is phenolphthalein a compound?
Yes, phenolphthalein is a compound with the molecular formula C20H14O4.
Why is phenolphthalein indicator used?
Phenolphthalein is used as an indicator because the color of the solution is changed according to pH.
Do bases turn phenolphthalein clear?
No, bases turn phenolphthalein pink or purple in color. Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions with a pH higher than around 8.2.
What is the action of sodium hydroxide on the colour of phenolphthalein?
Phenolphthalein is pink in basic solutions.Phenolphthalein is used as an indicator in volumetry - acid-base titration.
What is phenolphthalein made of?
Phenolphthalein is a synthetic organic compound made from phenol and phthalic anhydride. It is commonly used as a pH indicator in chemistry experiments due to its color-changing properties.
Is phenolphthalein a compound?
Yes, phenolphthalein is a compound with the molecular formula C20H14O4.
What colour in sulfuric acid is phenolphthalein?
Phenolphthalein is colorless in sulfuric acid.
Does Ammonia turns phenolphthalein in to pink?
No, ammonia does not turn phenolphthalein pink. Phenolphthalein is a pH indicator that turns pink in basic solutions, but ammonia is a weak base and typically does not have a strong enough pH to turn phenolphthalein pink.
Which Colour do alkali turn phenolphthalein?
Alkalis turn phenolphthalein pink or magenta.
What color does NaoH turn when phenolphthalein?
NaOH turns pink when phenolphthalein is added.
When phenolphthalein is added to ammonium hydroxide is the color of the final solution is pink?
Phenolphthalein is a colorless indicator in acidic solutions but turns pink in basic solutions. If phenolphthalein turns pink when added to ammonium hydroxide, which is a basic solution, it indicates the presence of a pH above 7.
What would happen if I placed a Vial of phenolphthalein into a jar with ammonia?
If you placed a Vial of phenolphthalein into a jar with ammonia, the phenolphthalein would turn pink. This color change occurs due to the ammonia making the solution more basic, causing the phenolphthalein to shift from its colorless form to a pink hue.
Phenolphthalein goes what colour in a base?
Phenolphthalein turns pink in a base and turns colourless in a base
Why phenolphthalein get colour on basic medium?
Phenolphthalein is colorless in acidic solutions but turns pink or purple in basic solutions because the hydroxide ions in the basic medium react with phenolphthalein to form a pink-colored compound. This color change is due to a shift in the chemical structure of phenolphthalein when exposed to a basic environment.
Which is more polar bromophenol blue or phenolphthalein?
Phenolphthalein is more polar than bromophenol blue due to its structure and functional groups. Phenolphthalein contains more oxygen atoms that can participate in hydrogen bonding, making it a more polar compound compared to bromophenol blue.
What would happen if you added phenolphthalein to sodium hydroxide?
Phenolphthalein is a pH indicator that turns pink in basic solutions. When added to sodium hydroxide, which is a strong base, the phenolphthalein will turn pink to indicate that the solution is basic.
Is phenolphthalein a chemical property or a physical property?
Phenolphthalein itself is a chemical. It changing color is a chemical change.
