Question

a) Write the chemical name for Na2CO3. 10H2O and NA2CO3.

b) Write the significance of 10 H2O in the substance.

C) Mention the term used for water molecules attached with salt

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Answer 1

( a ). Chemical name for Na2CO3. 10H2O is Washing Soda ( Sodium carbonate decahydrate ) and for Na2CO3 is Sodium Carbonate.

( b ). 10 H2O is the water of crystallisation which is attached with Na2CO3. This makes the salt look dry but it actually contains fixed number of water molecules present in one formula unit of a salt.

( c ). The term used is " Water of Crystallisation ".

Answer 2

a) Both are Sodium Carbonate but one with little water.

b) It is water which is fixed by chemical process or heating so, it can also be reduced by chemical process and heating only.

c) ☝️both are same.

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