04 What happens when: Give chemical reactions wherever possible)
a)Zinc granules are dropped in copper sulphate solution.
b)magnesium ribbon is burn in air
c)Sulphur is burn in presence of air
d) Sulphur dioxide is dissolved in water
e)Copper pieces are dropped in iron sulphate.
Answers
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When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.
When a strip of zinc metal is placed into a blue solution of copper(II) sulfate ( Figure below ), a reaction immediately begins as the zinc strip begins to darken. If left in the solution for a longer period of time, the zinc will gradually decay due to oxidation to zinc ions.
(a) When zinc metal is added to copper sulphate solution, the colour of CuSO4 solution disappears and colourless zinc sulphate solution is formed. Solid brown copper is deposited as it displaces by Zn. ... (c) Silver is a Nobel metal and does not exhibit any reaction with copper sulphate.