(Solved): 9. Figure 4 shows what happens when copper is added to different concentrations of hydrochloric aci ...

9. Figure 4 shows what happens when copper is added to different concentrations of hydrochloric acid and nitric acid. Figure 4 Identical pieces of copper metal are placed in hydrochloric acid and nitric acid. A reaction is only observed in test tube D. After a few minutes the solution in this test tube turns blue, the characteristic colour of the copper(II) ion. (a) Use the Table 1 in Appendix B7 to justify the difference between the reactivity of copper in hydrochloric acid and its reactivity in nitric acic (b) Suggest an explanation for the difference in reactivity in the two nitric acid solutions. 9.3 Predicting Redox Reactions Table 14: Standard Reduction Potentials for Half Renctions (all ions are in water, ionic concentrations $$=1\mathrm{mol}{\mathrm{L}}^{?1}$$, temperature $$=25^{?}\mathrm{C}$$ ) $$\begin{array}{l}2{\mathrm{H}}_2\mathrm{O}+2{\mathrm{e}}^{?}=2{\mathrm{OH}}^{?}+{\mathrm{H}}_2(8)\\ {\mathrm{Mn}}^{2+}+2{\mathrm{e}}^{?}=\mathrm{Mn}(\mathrm{s})\\ {\mathrm{V}}^{??}+2{\mathrm{e}}^{?}?=\mathrm{V}\text{ (s) }\\ A^{3?}+3e^{?}=Al(s)\\ {\mathrm{Tr}}^{\mathrm{H}+}+2{\mathrm{e}}^{?}=\mathrm{Ti}(\mathrm{s})\\ {\mathrm{Mg}}^{2?}+2e^{?}=\mathrm{Mg}\text{ (s) }\mathrm{B}/OA\\ {\mathrm{Na}}^{?}+{\mathrm{e}}^{?}?=\mathrm{Na}(\mathrm{s})\\ {\mathrm{Ca}}^{2?}+2{\mathrm{e}}^{?}=\mathrm{Ca}\text{ (s) }\\ {\mathrm{Sr}}^{2+}+2{\mathrm{e}}^{?}=\mathrm{Sr}(s)\\ ?{\mathrm{Ba}}^{2?}+2{\mathrm{e}}^{?}?\mathrm{Ba}(\mathrm{s})0/?\mathrm{A}\\ {\mathrm{Cs}}^{?}+{\mathrm{e}}^{?}?\mathrm{Cs}\text{ (s) }\\ {\mathrm{K}}^{?}+{\mathrm{e}}^{?}?\mathrm{K}(\mathrm{s})\\ {\mathrm{Rb}}^{?}+{\mathrm{e}}^{?}?\mathrm{Rb}\text{ (s) }\\ {\mathrm{Li}}^{?}+{\mathrm{e}}^{?}=\mathrm{Li}(\mathrm{s})\end{array}$$ - These values are for neutral aqueous solutions.