Chapter 15, Problem 15.86CQ

Using the activity series in Table 15.3, indicate whether each of the following reactions is spontaneous: (15.3)

1. $Cu\left(s\right)+N{i}^{2+}\left(aq\right)\to C{u}^{2+}\left(aq\right)+Ni\left(s\right)$
2. $2Cr\left(s\right)+3F{e}^{2+}\left(aq\right)\to 2C{r}^{3+}\left(aq\right)+3Fe\left(s\right)$
3. $Fe\left(s\right)+M{g}^{2+}\left(aq\right)\to F{e}^{2+}\left(aq\right)+Mg\left(s\right)$