Why Does Blue Copper Sulfate Turn White on Heating? | Water of Crystallization | Class 10 Chemistry

Added: 2026-05-17

[00:00:00]What if I told you that color of a crystal can disappear just because it lost water, no chemicals added, no reaction with acid, just heat and suddenly this beautiful crystal becomes white powder. That blue color of copper sulfate pentahhydrate is actually because water molecules are attached inside the crystal. As heating removes the water, the crystal loses both its color and crystal shape. And this attached water is called water of crystallization. An important NCERTT class 10th concept. Washing soda also contains water molecules attached to it.

[00:00:40]That's why it is called sodium carbonate decahhydrate and gypsum also contains water. When heated, gypsum loses water and forms plaster of Paris. So next time you see a crystal remember water molecules are sometimes responsible for their color, shape and identity. Thank you so much for watching this video. For more such science and maths related videos subscribe to our channel.