GENERAL KNOWLEDGE

GK

CHEMISTRY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the name of the precipitate formed in the reaction of calcium sulfide and aluminum nitrate
A
calcium nitrate
B
aluminum sulfide
C
no ppt is formed
D
aluminum nitrate
Explanation: 

Detailed explanation-1: -Yes, CaS(s) is the precipitate. Its name is calcium sulfide.

Detailed explanation-2: -The utilization of CaS as a precipitation agent, resulted in effective metal removal from acidic wastewater effluent.

Detailed explanation-3: -When mixed, solutions of aluminum nitrate, Al(NO3)3, and ammonium carbonate, (NH4)2CO3, will form a precipitate of aluminum carbonate, Al2(CO3)3.

Detailed explanation-4: -Calcium sulfide is used in phosphors, lubricant additives and luminous paints. It reacts with elemental sulfur to give a lime-sulfur. Further, it is used in ore dressing and flotation agent. In addition to this, it is used as a depilatory in the tanning industry and in cosmetics.

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