The colour of the solution observed after 30 minutes of placing zinc metal to coppersulphate solution is

Why does the colour of copper sulphate solution change when

Zinc is more reactive than copper and hence it displaces copper from copper sulphate solution. As a result a number of holes were observed on the zinc plate.

efers to the following experiment, which was set up and observed periodically for 1 hour:After 1 hour the following observations were made EXCEPTAThe solution had become paler blueBThe zinc rod had decreased in sizeCThe volume of the solution had decreasedDPink particles had collected at the bottom of the beaker

Shorten to 100 words: The experiment includes the process of decantation between copper solid and the supernatant. During this procedure, some copper solid was lost when the supernatant solution was separated from the precipitate. This could have been due to the incomplete separation of the solution and the precipitate which could have led to the loss of copper solid recovered (final mass) and therefore reduction of percentage yield. Another possible source of error could be that the reaction between CuSO4 and Zinc powder was incomplete. This indicates that the amount of zinc added to the solution was less than the stoichiometric amount required to completely displace all the copper ions. As a result, the actual amount of copper solid produced was less than the theoretical yield. This discrepancy reduced the percentage yield of copper.

Heat a few crystals of copper sulphatein a dry boiling tube.n What is the colour of the coppersulphate after heating?n Do you notice water droplets in theboiling tube? Where have these comefrom?n Add 2-3 drops of water on the sampleof copper sulphate obtained afterheating.n What do you observe? Is the bluecolour of copper sulphate restored?