Answer the following question relating your answers only -to salts in the list given below:
Anhydrous ${C a C l}_{2}, {C u S O}_{4}, 5 H_{2} {O, N a}_{2} {C O}_{3} {10 H}_{2} O$
Which compound is deliquescent?

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Solution

Deliquescent substances are solids that absorb moisture from the atmosphere until they dissolve in the absorbed water and form solutions. Example: $C a C l_{2}$

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{C a C l}_{2}, {C u S O}_{4} .5 H_{2} {O, N a}_{2} {C O}_{3} . {10 H}_{2} O

{C a C l}_{2}, {C u S O}_{4} . 5 H_{2} {O, N a}_{2} {C O}_{3} . {10 H}_{2} O

{C a C l}_{2}, {C u S O}_{4} .5 H_{2} {O, N a}_{2} {C O}_{3} . {10 H}_{2} O

Answer the question below, relating your answers only to salts in the following list :

Sodium chloride, anhydrous calcium chloride, copper sulphate-5-water ?

(a) What name is given to the water in the compound copper sulphate-5-water ?

(b) If copper sulphate-5-water is heated, anhydrous copper sulphate is formed. What is its colour ?

(c) By what means, other than heating, could you dehydrate copper sulphate-5-water and obtain anhydrous copper sulphate ?

(d) Which one of the salts in the given list is deliquescent ?

{N a}_{2} {C O}_{3} . {x H}_{2} O

x

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