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

When zinc metal is placed in a copper sulphate solution, a displacement reaction occurs. This is because zinc is more reactive than copper.

Here are the steps of the reaction:

1. Zinc displaces copper from the copper sulphate solution. The equation for this reaction is: Zn(s) + CuSO4(aq) -> ZnSO4(aq) + Cu(s).

2. As a result of this reaction, the blue color of the copper sulphate solution fades and the solution becomes colorless. This is because the blue copper ions (Cu2+) are replaced by colorless zinc ions (Zn2+).

3. After 30 minutes, you will observe that the solution has turned colorless and a reddish-brown deposit (copper) has formed on the zinc metal.

So, the color of the solution observed after 30 minutes of placing zinc metal in a copper sulphate solution is colorless.