What are the examples of efflorescent substances?

Answer 1

Efflorescence refers to the process where wet particles decrease in size through losing water to eventually crystallize out. An example of an efflorescent substance is the common Copper(II) sulfate crystal (CuSO4.5H2O), a blue crystalline solid that when exposed to air, slowly loses water of crystallization from its surface to crystallise to form a white layer of anhydrous copper(II) sulfate.

Answer 2

The loss of water (or solvent) of crystallization from a hydrated or solvated salts to the atmosphere on exposure to air

Examples:

•Na2CO3 (washing soda)

•CuSO4 (copper sulfate)

•Na2SO4 (glauber salt)

Answer 3

Examples of efflorescent substances include hydrated salts like sodium sulfate, sodium carbonate, and magnesium sulfate. These substances tend to lose water molecules when exposed to air, leading to the formation of a powdery crystalline residue on the surface.