MCQ
The indicator used in the titration of iodine against sodium thiosulphate is
- ✓Starch
- B${K_3}Fe{(CN)_6}$
- C${K_2}Cr{O_4}$
- DPotassium
✓
Answer
Correct option: A.
Starch
a
In an iodometric titration, a starch solution is used as an indicator since it can absorb the $I _2$ that is released. This absorption will cause the solution to change its colour from deep blue to light yellow when titrated with a standardized thiosulfate solution. This indicates the endpoint of the titration.
In an iodometric titration, a starch solution is used as an indicator since it can absorb the $I _2$ that is released. This absorption will cause the solution to change its colour from deep blue to light yellow when titrated with a standardized thiosulfate solution. This indicates the endpoint of the titration.
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