Answer to Question #125431 in Organic Chemistry for Kwaku

Question

Student X titrated 25.0cm

3 of 0.1M K2CO3 with 0.1M HCl, using methyl orange as indicator. Student Y carried out the same exercise but used phenolphthalein as indicator.Which of the following statements about the titrations is true?

A.The titre values obtained from the two titrations are equal

B.The titre value for the titration by X is twice that by Y

C.The titre value for the titration by X is half that by Y

D.CO2(g) was released in the reactions in both titrations

Answer 1

Answer is " B ".

When Methyl Orange is Used as a indicator then 2 mole of HCl is reacted with K₂CO₃ .

When  phenolphthalein is used as indicator then 1 mole of HCl is Used With K₂CO₃ .

Titre Value with Methyl Orange is Used as a indicator is twice that of phenolphthalein is used as indicator .