The indicator used in the titration of Na_2CO | vedclass

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Question

(B) The titration of $Na_2CO_3$ with $HCl$ involves the reaction of a weak base with a strong acid.At the first equivalence point,$NaHCO_3$ is formed,

Vedclass · Accepted Answer

Methyl orange

Vedclass · Answer

(B) The titration of $Na_2CO_3$ with $HCl$ involves the reaction of a weak base with a strong acid.At the first equivalence point,$NaHCO_3$ is formed,and phenolphthalein can be used.However,for the complete neutralization to $NaCl$,$CO_2$,and $H_2O$,the pH drops into the acidic range (around $3.7$ to $4.5$).Methyl orange is the suitable indicator for this range,as it changes color in the acidic pH range.

The indicator used in the titration of $Na_2CO_3$ with $HCl$ is..................

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