Question

Q.15. A blue colour salt becomes white on heating. Give reason for the above
heating. Give reason for the above observation.
What happens when we add water to the salt which is obtained after heating? Also
write its formula. 3marks​

Answer 1

Answer:

Copper sulphate (CuSO4) turns blue in colour after adding few droplets of water because of addition of water of crystallization in it.

It turns into white on heating because of heat water of crystallization get removed and become anhydrous solution. So the colour of Copper sulphate becomes white on heating.

CuSO4 +5H2O __________ CuSO4.5H2O _________ CuSO4 (by heating)

Answer 2

Hello

Njn Malayali Ann

keralathil evideya?

ANSWER:

_________

Hydrated Copper Sulphate crystals [CuSO4.5H2O] are blue in colour.

Hydrated Copper Sulphate crystals [CuSO4.5H2O] are blue in colour.When copper sulphate crystals are heated strongly, they loose all the water of crystallization and form anhydrous copper sulphate [which is white in colour].

Hydrated Copper Sulphate crystals [CuSO4.5H2O] are blue in colour.When copper sulphate crystals are heated strongly, they loose all the water of crystallization and form anhydrous copper sulphate [which is white in colour].CuSO4.5H2O ---------> CuSO4 + 5H2O

Hydrated Copper Sulphate crystals [CuSO4.5H2O] are blue in colour.When copper sulphate crystals are heated strongly, they loose all the water of crystallization and form anhydrous copper sulphate [which is white in colour].CuSO4.5H2O ---------> CuSO4 + 5H2OHydrated Anhydrous

Hydrated Copper Sulphate crystals [CuSO4.5H2O] are blue in colour.When copper sulphate crystals are heated strongly, they loose all the water of crystallization and form anhydrous copper sulphate [which is white in colour].CuSO4.5H2O ---------> CuSO4 + 5H2OHydrated Anhydrous Copper sulphate Copper sulphate

Hydrated Copper Sulphate crystals [CuSO4.5H2O] are blue in colour.When copper sulphate crystals are heated strongly, they loose all the water of crystallization and form anhydrous copper sulphate [which is white in colour].CuSO4.5H2O ---------> CuSO4 + 5H2OHydrated Anhydrous Copper sulphate Copper sulphateThe water of crystallisation gives the crystals of their salts their shape and colour.

________________

Pls Mark Me as Brainliest....

Don't forget to follow me....