Question

write about s lacked lime and plaster of Paris

Answer 1

✔️✔️️Ca(OH)2

⭕️Ca(OH)2 or s-lacked lime is used to detect the presence of Co2 which turns milky due to formation of caco3

⭕️On passing excess of co2 the solution becomes transparent due to formation of calcium bicarbonate which is slouble in water.

Caco3+H2o+co2→ ca(hco3)2

✔️✔️Uses :-

⭕️Ca(oh)2 is used for white washing.

️⭕️maufature of bleaching powder.

✔️✔️POP

⭕️Plaster of Paris is prepared by heating gypsum [which is chemically calcium sulphate dihydrate (CaSO4.2H2O)] at 373 K.

⭕it was first made by heating gypsum which is mainly found in Paris.

️⭕CaSO4·2H2O + Heat → CaSO4·½H2O + 1½ H2O (released as steam)



✔️✔️Uses :-


️⭕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.

⭕️It is used in making casts of statues, moulds for pottery and ceramics. 

⭕️It is also used in building material. 

⭕️It is used in dentistry.

Answer 2

Calcium oxide (CaO) reacts vigorously with water to form Slaked Lime.

¶ The product Formed Is Slaked lime for which the chemical formula is Ca(OH)2.

Uses Of Calcium hydroxide ;-

Calcium hydroxide is used in many applications, including food preparation etc.

Plaster of Paris ;-

Chemical name ;- calcium sulphate hemihydrate.

Chemical formula:- CaSO4.1/2H2O

Uses of plaster of Paris;-

For making statues, toys etc.

For making fireproof material.

For setting fractured bones.
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