Question

what prosecution should you take while preparing starch solution? ​

Answer 1

Pour a few drops of distilled water and pestle the starch into a thin paste. Transfer the grinded paste to a 50 ml beaker. Take a 250 mL beaker and pour 100 mL of distilled water to it and heat the water to boiling. Slowly pour the paste into the boiling water and constantly keep stirring with the help of glass rod.

Answer 2

Explanation:

● Forming colloidal solution of starch -

◆ Procedure -

- Make thin paste of starch.

- Add this paste to thin stream of boiling water with constant stirring.

◆ Precautions -

- Equipment should be properly cleaned before expt.

- Solution should be prepared only using distilled water.

- Starch should be made into paste.

- Solution should be prepared in boiling water.

- Continuously stir the solution to avoid formation of lumps.