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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