the amount of sodium hydrogen , NaHCO3, in an antacid tablet is to be determined by dissolving the tablet in water and titrating the resulting solution with hydrochloric acid. which indicator is the most appropriate for this titration? acid Ka H2CO3 2.5* 10^-4 HCO3- 2.4*10^-8 a) methyl orange , pkin= 3.7 b) bromothymol blue, pkin=7.0 c) phenolphthalein, pkin=9.3 d) alizarin yellow, pkin= 12.5

Dear student,

The equivalent point of the titration will be in acidic region i,e pH < 7

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