Question

why cola sample is heated before titration?
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Answer 1

Answer:

The carbonation can produce some carbonic acid in the Cola, which would affect your results. Therefore, to ensure that you are only titrating the phosphoric acid you will use de-carbonated soda. This can easily be obtained by gently heating the soda, or as you may already know, by rapidly shaking the bottle.

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Answer 2

this is the answer for the question