Question

5. In titration of Na,Co, against HCl the burette usually filled with
a. sodium carbonate
c. hydrochloric acid
b. sodium bicarbonate
d. methyl orange​

Answer 1

In titration of Na,Co, against HCl the burette usually filled with Hydrochloric Acid.

Option (c).

Explanation:

• Titration is basically a process used to 'determine' the 'concentration' of a solution using another solution with a known Concentration.

• In the above when titration is done of Sodium Carbonate, Hydrochloric acid is filled in the burette and added drop by drop to the solution to reduce the alkalinity of the solution until the pH is 7.

• For titration, Indicators are used for detection like the Phenolphthalein Indicator or a methyl Orange Indicator.

• Here HCl is used because a colour at the 'endpoint changes' from yellow to red which is more comfortable to recognise from red to yellow.

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