Question

Pieces of four metals A,B,C & D were one by one added to four solutions, namely Fe(II)SO4, Cu(II)SO4, ZnSO4 and AgNO3.The observations are tabulated below:
METAL:Fe(II)SO4 Cu(II)SO4 ZSO4 AgNO3
A No react Displacemnt - -
B Displacmnt - No react -
C - - No react Dsplacmnt
D - - No react No react
(e)Which of the above solutions can be safely stored in a container made up of any one of these metals?

Answer 1

Consider from the previous question (in chemistry that had the same table).
Order of reactivity was found to be Zn > B > Fe > A > Cu > C > Ag > D

For a solution to be safely stored in a container, the metal in the solution must be more reactive than the metal from which the container is made otherwise, the if the metal of the container is more reactive, it will react with the solution and displace the metal and itself will start dissolving.

For example, ZnSO4 can be stored in all containers made from A/B/C/D because Zn is more reactive than all those metals.
But if you place CuSO4 in container made of B, B will displace Cu from CuSO4 dissolving the container.

So, ZnSO4 can be stored in a container made of any one of those metals (A,B,C,D)

Answer 2

Thank you for your kind help and guidance, FoolAroundMath ! :)