A metal X forms a salt `XSO_(4).` The sale `XSO_(4)` forms a clear solution in water which reacts with sodium hydroxide solution to from a blue precipitate Y. Metal X is used in making electric wires and alloys like brass.
(a) What do you thing metal X could be ?
(b) Write the name, formula and colour of salt `XSO_(4).`
(c ) What is the blue precipitate Y ?
(d) Write a chemical equaltion of the reaction which takes place when salt `XSO_(4)` reacts with sodium hydroxide solution. Give the state symobols of all the reactants and products which occur in the above equation.

Answer

(a) Copper, Cu (b) Copper sulphate, `CuSO_(4),` Blue colour (c ) Copper hydroxide, `Cu(OH)_(2)`
(d) `CuSO_(4)(aq)+2NaOH(aq)toCu(OH)_(2)(s)+Na_(2)SO_(4)(aq)`