Which pair of cations can be identified by th | vedclass

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Question

(A) The borax bead test is used to identify transition metal cations that form coloured metaborates when heated with borax $(Na_2B_4O_7 \cdot 10H_2O)$

Vedclass · Accepted Answer

$Cu^{2+}, Co^{2+}$

Vedclass · Answer

(A) The borax bead test is used to identify transition metal cations that form coloured metaborates when heated with borax $(Na_2B_4O_7 \cdot 10H_2O)$.Transition metals like $Cu^{2+}$,$Co^{2+}$,$Ni^{2+}$,$Fe^{3+}$,and $Cr^{3+}$ form characteristic coloured beads.$Zn^{2+}$,$Pb^{2+}$,and $Ag^{+}$ do not form coloured metaborates in the borax bead test.Therefore,the pair $Cu^{2+}$ and $Co^{2+}$ can both be identified by this test.

Which pair of cations can be identified by the borax bead test?

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