Conduct the practical and try to match the result with this.
In this article, we have given step-by-step procedure to perform an experiment which will help you understand how to prepare colloidal solution of starch. Read the article carefully to understand the aim, procedure and the apparatus required for the experiment. Conduct the practical and try to match the result with this.
Preparation of lyophilic sol of starch.
When water is used as a dispersion medium, starch has the ability to form sol. This formation is enhanced with the help of heating. To prepare sol the mixture of water and starch is heated to about 100° C.
2. The starch and distilled water is heated to what temperature?
3. How much amount of distilled water is taken to prepare 500 mg of starch sol?
4. Pour the paste into cold distilled water before boiling. True or false?
5. Constantly keep stirring the water in the beaker while adding the paste. True or false?
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