Question

Methyl orange and phenolphthalein are used for which purpose (1)Titration (2) Cooking (3)Dissolution (4)Neutralisation​

Answer 1

Answer:

phenolphthalein is used only for titration aming the options.

Explanation:

we use methyl orange and phenolphthalein to determine end points of acid-base titration. The selection of a particular indicator for the titration is decided on the basis of plot known as pH curve, which is typical of a particular reaction. The indicator is always added to the reactant in the flask.

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Answer 2

Methyl orange and phenolphthalein are used for purpose of (1)Titration

• Phenolphthalein and methyl orange are both used as acid-base indicators to determine the endpoint in titration.
• Phenolphthalein changes colour at a pH above 7. So it is good as an indicator for titrations of strong acids with strong bases. It is colourless with acids while pink with bases.
• Methyl orange changes colour at a suitable pH. It shows red colour with acids and turns to yellow with bases.