# Given one use of (i) calcium sulphate hemihydrate (ii) caustic soda Write the balanced equation for the action of water on KO2.

Dear Student,

Please find below the solution of your asked queries:

1.(i) Plaster of Paris is chemically Calcium Sulphate Hemihydrate, and has the chemical formula CaSO4.1/2H2O. Its uses are as follows:
• It is used in making toys, materials for decoration and for making smooth surfaces.
• It is used in surgical bandages by doctors for supporting fractured bones in the right position.
(ii) Sodium hydroxide or caustic soda is majorly used:
• As liquid drain cleaners or cleaning ovens.
• It is also used for the manufacture of plastic wrap, soaps and paper.
2. Reaction Involved-

2KO2 + 2H2O $\stackrel{}{\mathbf{\to }}$ 2KOH + O2 + H2O2

Hope this information clears your doubts about the topic.

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