Question

(a) What are the common names of (a) CaOCl2, and (b) Na2CO3.10H2O?
(b) Why should plaster of Paris be stored in a moisture-proof container?
​(c) Explain why, while diluting a concentrated acid, acid should be added to water and not water to the acid.

Answer 1

Answer:

1. Bleaching powder, Washing soda.
2. Plaster of Paris in contact with moisture (water) changes to solid hard mass, gypsum. Therefore, it gets wasted. Hence it should be stored in moisture proof containers.
3. Acid should be added to water because the reaction is highly endothermic, and so, the heat evolved may cause the spurting of the acid.

Answer 2

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Answer in Attachment...