Kemija - 2011./12. jesen - 38.

A. ${\mathrm{C}\mathrm{u}}^{2+}+{\mathrm{A}\mathrm{l}}^{3+}\to \mathrm{C}\mathrm{u}+\mathrm{A}\mathrm{l}\backslash mathrm\{Cu\}^\{2+\}+\backslash mathrm\{Al\}^\{3+\}\; \backslash rightarrow\; \backslash mathrm\{Cu\}+\backslash mathrm\{Al\}$

B. $\mathrm{C}\mathrm{u}+{\mathrm{A}\mathrm{l}}^{3+}\to {\mathrm{C}\mathrm{u}}^{2+}+\mathrm{A}\mathrm{l}\backslash mathrm\{Cu\}+\backslash mathrm\{Al\}^\{3+\}\; \backslash rightarrow\; \backslash mathrm\{Cu\}^\{2+\}+\backslash mathrm\{Al\}$

C. ${\mathrm{C}\mathrm{u}}^{2+}+\mathrm{A}\mathrm{l}\to \mathrm{C}\mathrm{u}+{\mathrm{A}\mathrm{l}}^{3+}\backslash mathrm\{Cu\}^\{2+\}+\backslash mathrm\{Al\}\; \backslash rightarrow\; \backslash mathrm\{Cu\}+\backslash mathrm\{Al\}^\{3+\}$

D. $\mathrm{C}\mathrm{u}+\mathrm{A}\mathrm{l}\to {\mathrm{C}\mathrm{u}}^{2+}+{\mathrm{A}\mathrm{l}}^{3+}\backslash mathrm\{Cu\}+\backslash mathrm\{Al\}\; \backslash rightarrow\; \backslash mathrm\{Cu\}^\{2+\}+\backslash mathrm\{Al\}^\{3+\}$