Question

Is starch a redox indicator?

Answer 1

Answer:

Explanation:

Starch is the indicator of choice for redox titrations involving iodine, because it forms an intense blue complex with iodine. Starch is not a redox indicator; it responds specifically to the presence of I2, not to a change in redox potential.

Answer 2

Explanation:

Starch is the indicator of choice for redox titrations involving iodine, because it forms an intense blue complex with iodine. Starch is not a redox indicator; it responds specifically to the presence of I2, not to a change in redox potential

The starch forces the iodine atoms into a linear arrangement in the central groove of the amylose coil. It can also be used as a general redox indicator: when there is excess oxidizing agent, the complex is blue; when there is excess reducing agent, the I5- breaks up into iodine and iodide and the color disappears.

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