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 blue in colour?

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Solution

$C u S O_{4} .5 H_{2} O$ is blue in colour due to the water of crystallisation.

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Similar questions

{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 ?

_{A drop of water is poured over a white powdery substance. Then it is observed that the substance turns blue. Answer the following questions :}

_{(i) What is the white powdery substance?}

_{(ii) Why does the substance change to blue colour?}

_{(iii) Write the chemical formula of the blue substance .}

_{(iv) Is the blue substance an acidic salt or a basic salt?}

_{(v) Give a reason for your answer in (iv).}

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