Question

Procedure :
(1) Take about 20 ml of copper sulphate solution in a test tube. Note its colour,
(2) Take 2 or 3 iron nails free from rust. Clean them with sandpaper and wash with water. Note the colou
of the iron nails.
(3) Place the iron nails in copper sulphate solution for about 15 minutes.
(4) Remove the nails from the solution, wash them with water and keep them on a filter paper to dry
(5) Finally note the colour of the solution as well as the nails after reaction.
Diagram : Label the various components in the given diagram.
Before reaction
After reaction
bservation table :
Experimental procedure
Observation
Colour of copper sulphate solution​

Answer 1

Blue colour of the copper sulphate solution changes into green colour & then iron nail acquires a brownish look. This is because that iron is more reactive than copper. The following chemical reaction takes place in this activity. Fe+CuSO  4  →FeSO  4  +Cu  In this reaction, iron displaces copper from CuSO  4   solution.

Copper(II) sulfate, also known as copper sulphate, are the inorganic compounds with the chemical formula CuSO4(H2O)x, where x can range from 0 to 5. The pentahydrate (x = 5) is the most common form. Older names for this compound include blue vitriol, bluestone,[9] vitriol of copper,[10] and Roman vitriol.[11]

The pentahydrate (CuSO4·5H2O), the most commonly encountered salt, is bright blue. It exothermically dissolves in water to give the aquo complex [Cu(H2O)6]2+, which has octahedral molecular geometry. The structure of the solid pentahydrate reveals a polymeric structure wherein copper is again octahedral but bound to four water ligands. The Cu(II)(H2O)4 centers are interconnected by sulfate anions to form chains.[12] Anhydrous copper sulfate is a light grey powder.

Appearance gray-white (anhydrous) blue (pentahydrate)

Density 3.60 g/cm3 (anhydrous) 2.286 g/cm3 (pentahydrate)

Melting point 110 °C (230 °F; 383 K) decomposes (·5H2O) if pentahydrate <560 °C decomposes if anhydrous

Boiling point decomposes