Question: When 4 Drops Of Phenolphthalein Are Added To Hydrochloric Acid What Is The Solution?

What is the effect of acid on phenolphthalein?

Phenolphthalein is often used as an indicator in acid–base titrations.

For this application, it turns colorless in acidic solutions and pink in basic solutions.

It belongs to the class of dyes known as phthalein dyes..

What happens when some drops of phenolphthalein are added to the substance B?

Solution : The solutio A is basic in nature and phenolphthalein has imparted pink colour to it. The solution B is of an acid which has ultimately made solution A colourless by neutralising its basic effect. Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

Does the Colour of phenolphthalein reappear?

Phenolphthalein is basic indicator which remain colorless in acidic and neutral solution and turns pink or magenta in basic solution. … (iii) If few drops of NaOH is added again to the same solution, the solution become basic and the pink color of the phenolphthalein reappears.

What happens when acid is added to methyl orange?

Methyl orange shows red color in acidic medium and yellow color in basic medium. … In a solution becoming less acidic, methyl orange changes from red to orange and, finally, to yellow—with the reverse process occurring in a solution of increasing acidity.

What happens when a few drops of phenolphthalein is added to dilute HCL?

When few drops of phenolphthalein are added to a dilute solution hydroxide a pink colour is produced.

When few drops of phenolphthalein are added to a dilute solution of sodium hydroxide?

When few drops of phenolphthalein are added to dilute solution of sodium hydroxide a pink colour is produced .

What happens when water is added to concentrated acid?

If you add water to acid it forms an extremely concentrated solution of acid initially. So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container and all this because the reaction is exothermic. … So,You should add acid to water.

What happens when phenolphthalein is added to Naoh?

Explanation: When the sodium hydroxide, which is a base, is mixed with phenolphthalein, it turns pink. … This happens because the base is neutralized in an acid solution, which causes the indicator to become colorless. All of the base is neutralized by the citric acid.

What happens when a few drops of phenolphthalein is added to an acidic solution?

Answer: We all know that phenolphthalein gives no colour when added to an acidic solution. Phenolphthalein is an acid indicator,means when we add water (pH 7) to it,it ionises giving a pink colour. If concentration of is greater than that of then the solution will be colourless.

Is phenolphthalein a base or acid?

Phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator. As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8.5 and attains a pink to deep red hue above pH 9.0.

Why is phenolphthalein the best indicator?

A strong acid- strong base titration is performed using a phenolphthalein indicator. Phenolphtalein is chosen because it changes color in a pH range between 8.3 – 10. It will appear pink in basic solutions and clear in acidic solutions.

Why did the Colour of phenolphthalein change after the addition of acid?

Answer: Phenolphthalein is a weak acid, which is why when it is added in a strong base, it gives pink color and the color gets intense as the PH of the base increases. … By adding HCL in the solution, the pink color of phenolphthalein will disappear.

What happens when phenolphthalein is added to hydrochloric acid?

On adding nearly 5 mL sodium hydroxide solution to the mixture of hydrochloric acid and phenolphthalein solution, the colour of the mixture changes to pink. On addition of hydrochloric acid solution to the pink solution, the colour starts fading gradually and finally the solution becomes colourless.

When a few drops of phenolphthalein indicator are added to an acidic solution what will be the change in Colour of the solution?

Solution : Phenolphthalein acquires pink colour in sodium hydroxide solution because of its basic nature. On adding excess of HCl, the solution will become acidic and the solution will change colour from pink to colourless.

What color is phenolphthalein in an acidic solution?

PinkOther indicatorsIndicatorAcidicAlkalineMethyl orangeRedYellowPhenolphthaleinColourlessPink

What happens when two drops of phenolphthalein are added to a dilute solution of NaOH?

Phenolphthalein remains colourless in neutral or acidic solution but turns out magenta or pink in basic solutions. When it is added to NaOH, the solution has the colour of pink since sodium hydroxide is a strong base.

When 4 drops of phenolphthalein added to hydrochloric acid What is the solution?

Answer. Phenolphthalein is an indicator which is colourless in acidic medium and pink in basic medium. Since Hydrochloric acid is an acid,the solution will turn Colourless.