Question

While performing an experiment in a laboratory smith has exchanged his test

tube containing water and HCl solution. Currently in his lab only two indicators are

available i.e phenolphthalein & methyl orange. Which among these two indicators

must be used by him to distinguish his solution? Why?​

Answer 1

Explanation:

Answer:

Methyl orange is a pH indicator used in titrations because of its clear and distinct colour change. It shows red colour in acidic and yellow colour in basic medium.

Electrolysis of brine or sodium chloride solution produces sodium hydroxide, NaOH which is a strong base. Using methyl orange as an indicator gives a yellow colour solution for NaOH.

Explanation:

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NTSE WB Stage I 2012-13

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Related Questions to study

Identity the titration for which phenolphthalein is suitable indicator.

Answer 2

In this question, we are asked to tell which indicator will be used to check the HCl solution.

• Because of its obvious and distinct colour change, methyl orange is a pH indicator that is used in titrations. It exhibits a red colour in an acidic medium and a yellow colour in a basic one.
• It exhibits a red colour in an acidic medium and a yellow colour in a basic one.
• Because it almost entirely dissociates, HCl is a powerful acid. A weak acid, such as acetic acid (CH3COOH), on the other hand, does not dissociate easily in water because numerous H+ ions are still locked inside the molecule.
• To dilute hydrochloric acid, methyl orange is added. When methyl orange is added, the color of the solution changes to red since diluted hydrochloric acid is acidic by nature.

PROJECT CODE #SPJ2

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