. Then the final products and , respectively,…

CHEMISTRY · Single correct · A Level · Chemistry · Transition metals and their chemistry · Transition metals and their chemistry

Problem

\mathrm{CuSO_4(aq)}\xrightarrow{\mathrm{H_2S}}\mathrm{M}\downarrow\xrightarrow{\text{excess }\mathrm{KCN}}\mathrm{N}+\mathrm{O}

. Then the final products

\mathrm{N}

and

\mathrm{O}

, respectively, are: (1)

[\mathrm{Cu(CN)_4}]^{3-}

(\mathrm{CN})_2

(2)

\mathrm{CuCN}

(\mathrm{CN})_2

(3)

[\mathrm{Cu(CN)_4}]^{2-}

(\mathrm{CN})_2

(4)

\mathrm{Cu(CN)_2}

\mathrm{K_2S}