Question

An efflorescent salt that partially loses its water of crystallization

Answer 1

Answer:

Na2CO3·10H2O.

Explanation:

is an example

Answer 2

Let us look at the answer:

Explanation:

Efflorescence is the loss of water of crystallization of certain hydrated compounds.

It occurs when the aqueous vapour pressure of hydrate is greater than the partial pressure of water vapour in air.

Na₂CO₃.10H₂O --> Sodium carbonate decahydrate commonly called as washing soda loses its 9 molecules of water of crystallization.

Another example is Na₂SO₄.10H₂O --> Sodium sulphate decahydrate commonly called as Glauber's salt. loses its water of crystallization wholly or partially.

So, Na₂CO₃.10H₂O and Na₂SO₄.10H₂O are two salts which are efflorescent.