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Phenolphthalein is pink in basic solutions.
Phenolphthalein is used as an indicator in volumetry - acid-base titration.

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Q: What is the action of sodium hydroxide on the colour of phenolphthalein?
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Colors of sodium hydroxide in phenolphthalein?

pink to fuchsia or colorless depending on the amount of sodiumhydroxide . Sodium hydroxide is colorless. The Phenophtalein gives the solution its colour


What is the action of sodium hydroxide on the colour of red litmus?

It turns blue


Why phenolphthalein is chosen as the suitable indicator for sodium hydroxide?

Sodium hydroxide is a base. And phenolphthalein is a pH indicator that changes color at around a pH of 8.4, so you can tell when your solution that endpoint.


Why is phenolphthalein indicator used in the titration of oxalic acid against sodium hydroxide?

Yes. Phenolphthalein can be used as an indicator for the titration of a weak acid (oxalic acid) against strong base (sodium hydroxide).


What would happen if you added phenolphthalein to sodium hydroxide?

Phenolphthalein is the indicator to see if it is more acidic or more basic


What colour changes will appear when phenolphthalein is mixed with sodium chloride solution?

Sodium Chloride is neutral. And Phenolphthalein is colourless when neutral.


What colo is PHTH in Sodium Hydroxide?

Phenolphthalein turns pink in basic solutions


Copper sulphate add to sodium hydroxide result colour?

Calcium sulphate + Sodium hydroxide > Sodium sulphate + Calcium hydroxide


What happen when sodium hydroxide is added drop wise to a solution containing phenolphthalein?

It Turns Pink.


What is colour of an aqueous solution of sodium carbonate in presence of a drop of phenolphthalein?

Pink


Is sodium hydroxide a base or acid how will you justify?

Adding an acid base indicator to a sodium hydroxide solution can verify that it is an alkaline solution. For example, phenolphthalein turns pink in an NaOH solution.


What indicator can you choose for the titration of oxalic acid with sodium hydroxide?

Phenolphthalein, because NaOH is a strong base.