Question

A metal 'X' forms a salt 'XSO4'.The salt 'XSO4' forms a clear solution in water which reacts with sodium hydroxide solution to form blue precipitate 'Y'.Metal 'X' is used in making electric wires and alloys like brass.
a)What do you think metal 'X' could be?
b)Write the name,formula and colour of salt 'XSO4'
c)What is blue precipitate 'Y'?
d)Write a chemical equation of the reaction which takes place when salt 'XSO4' reacts with sodium hydroxide solution.Give the state symbols of all the reatants and product which occur in the above equation.

Answer 1

a) Metal X is Cu (Copper).
b) Copper(II) sulfate, gray-white (anhydrous) blue (pentahydrate), CuSO4
c) Cu(OH)2
d)
CuSO4 (aq) + 2NaOH (aq) = Cu(OH)2 (s) + Na2SO4