Tag: some useful compounds in everyday life

Super phosphate of lime is a mixture of two salts calcium dihydrogen phosphate $Ca\left( { H } _{ 2 }{ PO } _{ 4 } \right) _{ 2 }$ and calcium sulfate dihydrate ${ CaSO } _{ 4 }\cdot { 2H } _{ 2 }O$

First by filtration sand can be separated from the mixture of sand, salt and water. Then by evaporation the water will get evaporated leaving behind the salt. The evaporated vapours can be collected and condensed to get water.

Salt plays a primary role in the process of digestion and absorption. Salt plays a role in digestion by helping to break down food. It creates hydrochloric acid which is very important digestive secretion lining the stomach walls. Salt helps the body to digest food.

Gypsum is a mineral and is hydrated calcium sulfate in chemical form. Gypsum plays a very important role in controlling the rate of hardening of the cement. During the cement manufacturing process, upon the cooling of clinker, a small amount of gypsum is introduced during the final grinding process.

Gypsum is added to control the “setting of cement”. If not added, the cement will set immediately after mixing of water leaving no time for concrete placing.

Gypsum plays an important role in controlling the rate of hardening of the cement. During cement manufacturing process upon cooling of clinker a small amount of gypsum is added during the final grinding process. Gypsum controls the setting of the cement and if not added the cement will set immediately leaving no time for concrete placing.

 $MnO _2$which is black, is used to remove the green color from the glass and imparts purple tint to the glass. $Cr _2O _3$ imparts dark green colour, $Cu _2O$ produces a turquoise color, and $AuCl _3$ gives ruby red coloured glass.

In the manufacture of Portland cement, clinker occurs as lumps or nodules, usually $3: mm \ (0.12: in)$ to $25\ mm (0.98: in)$ in diameter, produced by sintering (fused together without melting to the point of liquefaction) limestone and alumino-silicate materials such as clay during the cement kiln stage. Gypsum is not present in it. 

Potash alum is widely used in water treatment plant for clarification of water.

Sodium hydroxide is used in many industries, mostly as a strong chemical base in the manufacture of pulp and paper, textiles, drinking water, soaps and detergents and as a drain cleaner.

Light sensitive compounds are used in photography for developing films. Halides of silver like silver chloride and silver bromide shows such kinds of properties therefore used in photography.