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In a weak acid solution phenophthalein has the "lactone" form which hasn't color.

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What happen when oxalic acid is added to phenolphthalein?

Phenolphtalein is colorless in an acidic medium.


What color does ammonia turn when phenolphthalein is added?

Ammonia will turn pink when phenolphthalein is added, indicating that the solution is basic.


What colour would phenolphthalein go if added to borax solution?

Phenolphthalein would turn pink in a borax solution, indicating the solution is basic. Borax acts as a weak base in solution and would cause phenolphthalein to change color due to its alkaline nature.


What colour does phenolphthalen go when an alkali is added?

Phenolphthalein turns pink/magenta in the presence of an alkali.


When phenolphthalein is added to ammonium hydroxide is the color of the final solution is pink?

Phenolphthalein is an indicator often used in chemical titrations. Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions. The more basic the solution the pinker the solution will become when Phenolphthalein is present.


What happens if phenolphthalein was added to salts?

If phenolphthalein is added to a solution of salts, it will not undergo any specific reaction. Phenolphthalein is used as an indicator in acid-base titrations, where it changes color depending on the pH of the solution. Since salts do not have acidic or basic properties, phenolphthalein will not exhibit any color change.


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.


What happens if phenolphthalein solution is added in hydrochloric acid?

If phenolphthalein solution is added to hydrochloric acid, it will remain colorless since the pH of hydrochloric acid is too low for phenolphthalein to change color. Phenolphthalein typically turns pink in a basic solution but does not show a color change in acidic conditions.


What happens when water is added to phenolphthalein?

When water is added to phenolphthalein, the color remains the same, which is colorless. Phenolphthalein is typically used as an indicator in titrations with strong acid and strong base where the color change is triggered by changes in pH, not by the addition of water.


What colour would lime water turn in phenolphthaleln?

Lime water, which is a solution of calcium hydroxide, does not change color when phenolphthalein is added. Phenolphthalein is colorless in acidic solutions and turns pink in basic solutions. Since lime water is basic, it would typically show a pink color when phenolphthalein is present. However, if the lime water is sufficiently dilute, the color change may not be very pronounced.


What is the color of lime water when phenolphthalein is added into lime water?

The color is pink with phenolphthalein.


What colour is phenolphthalein when soda is added?

As soda contains carbon dioxide, it's actually a dilute solution of carbonic acid, hence phenolphthalein remains colourless.