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The most suitable indicator for the titrations of $Ba(OH)_2$ against HI is

(a) phenolphthalein
(b) methyl orange
(c) phenolphthalein & methyl orange
(d) None of these
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  • Suitable indicator for strong acid-strong base titrations are phenolphthalein & methyl orange.
Answer: phenolphthalein & methyl orange
$Ba(OH)_2$ is a strong base and HI is a strong acid, therefore both phenolphthalein & methyl orange can be used as an indicator in their titration.
answered Feb 1, 2014 by mosymeow_1
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