Question

Prepare colloidal solution of startch and ferric hydroxide separately.

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Answer 1

Answer:

Procedure

ProcedureTake a 250 ml conical flask and clean it by To this cleaned flask, add 100 ml of distilled water and heat it to boil by placing the flask on a wire-gauze.

Add ferric chloride solution drop wise (by the use of a burette or a dropper) to the boiling water.

Continue heating until deep red or brown solution of ferric hydroxide is obtained. Replace the water lost by evaporation during boiling at regular intervals.

Keep the contents of conical flask undisturbed for sometime at room temperature. Label the solution as “ferric hydroxide sol”.