Refer to the table below to answer the following questions: Pick an indicator fo

Question

Refer to the table below to answer the following questions: Pick an indicator for use in the titration of HF with a strong base. or bromthymol blue phenolphthalein or thymolphthalein phenol red or m-nitrophenol methyl red, Black T, or bromocresol purple o-cresolphthalein or phenolphthalein Pick an indicator for use in the titration of HCl with a strong base. methyl red, eriochrome or black T promenesol purple, bromphenol blue, m-nitrophenol, or phenol red erythrosin B, 2, 4 -dinitrophenol or or yellow R sigma- Pick an indicator for use in the titration of HCN with a strong base.

Explanation / Answer

ANS: (E) O-Crepslathein or phenolplathein used in tiration of HF and Strong base, equivalence point occurs around 8-9

Ans: (B)
HCl is a strong acid and KOH is a strong base. The pH at the equivalence point should be 7. So use bromothymol blue or phenol red, alizarin

Ans: (E) Alizarin Yellow R is used in titration of HCN with Strong base, as the equivalence point appears around PH range of 11-12

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