some iron filings were shaken with some copper (II) sulfate solution. The ionic equation for the reaction is :

a)write down any one change that you would observed during this reaction
b)which substance has been oxidized in this reaction
c) write down the full (not ionic) equation for this

a) The change here is that metallic iron is converted into ions and copper is deposited. This is called a displacement reaction.

b) is oxidised in this reaction.

c)$ \mathrm{Fe_{(s)}+ CuSO_{4(aq)} \rightarrow FeSO_{4(aq)} + Cu_{(s)}}$

a patient chooses to not take a beneficial medical treatment.

explanation: