Question

are the step to prepare the Colloidal solution from starch​

Answer 1

Take 500 mg of starch in a mortar and add few ml of distilled water.

Grind the starch to make a thin paste and transfer this paste to a 50 ml beaker.

Take about 100 ml of distilled water in a 250 ml beaker and heat the beaker so that water starts boiling.

Pour the paste slowly with stirring into boiling water in the beaker (Fig. 2.1).

Continue boiling for about 10 minutes and there allow the beaker to cool.

Filter the contents of the beaker through a filter-paper, fixed in a funnel.

Label the filtrate ‘Starch Sol’.

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Answer 2

To prepare a colloidal solution of starch , one should first add a thin paste of starch powder to boling water and stir