Question

how can you prepare the colloid of sulphur, egg albumin and starch powder ?​

Answer 1

Answer:

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Explanation:

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A. Preparation of Lyophilic Sol

I. Egg Albumin Sol

(i) Prepare 100 mL of 5% (w/v) solution of NaCl in water in

a 250 mL beaker.

(ii) Break one egg in a porcelain dish and pipette out the

albumin and pour it in sodium chloride solution.

Stir well to ensure that the sol is well prepared.

II. Starch/gum Sol

(i) Measure 100 mL of distilled water with the help of a

measuring cylinder and transfer it to a 250 mL beaker

and boil it.

(ii) Make a paste of 500 mg starch or gum in hot water

and transfer this paste to 100 mL of boiling water with

constant stirring. Keep water boiling and stirring for

10 minutes after addition of paste. To judge the efficacy

of the prepared sol, you may compare it with the

original paste prepared.

B. Preparation of Lyophobic Sol

I. Ferric hydroxide/Aluminium hydroxide

(i) Take 100 mL of distilled water in a 250 mL beaker and

boil it.

Answer 2

Answer:

To prepare colloidal solutions of starch and egg albumin in water.

1)Colloidal solution of starch in water: Take about 1 g of starch in a china dish, pour 10 mL of distilled water in the dish and stir the mixture.

2)Colloidal solution of egg albumin in water: Take 10 ml of water in a beaker.

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