Zgjidhja e ushtrimit 2

a) Cili nga këto reaksione është redoks? Shpjegoni pse.

1. $\text{2Mg}_{\text{(ng)}}$ $+$ $\text{CO}_{2\text{(g)}}$ $\rarr$ $\text{2MgO}_{\text{(ng)}}$ $+$ $\text{C}_{\text{(ng)}}$
2. $\text{SiO}_{2\text{(ng)}}$ $+$ $\text{C}_{\text{(ng)}}$ $\rarr$ $\text{Si}_{\text{(ng)}}$ $+$ $\text{CO}_{2\text{(g)}}$
3. $\text{NaOH}_{\text{(uj)}}$ $+$ $\text{HCl}_{\text{(uj)}}$ $\rarr$ $\text{NaCl}_{\text{(uj)}}$ $+$ $\text{H}_{2}\text{O}_{\text{(l)}}$
4. $\text{Fe}_{\text{(ng)}}$ $+$ $\text{CuO}_{\text{(ng)}}$ $\rarr$ $\text{FeO}_{\text{(ng)}}$ $+$ $\text{Cu}_{\text{(ng)}}$
5. $\text{C}_{\text{(ng)}}$ $+$ $\text{PbO}_{\text{(ng)}}$ $\rarr$ $\text{CO}_{\text{(g)}}$ $+$ $\text{Pb}_{\text{(ng)}}$

b) Për secilin reaksion redoks tregoni:

1. Cila substancë oksidohet?
2. Cila substancë reduktohet?