How can you identify a copper salt by bo...

How can you identify a copper salt by borax bead test ? Explain the related reactions with chemical equations.

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When borax is heated, it loses its water of crytallisaiton and as a result, it swells up like a puff.
The puffy mass is actually the dehydrated borax
`(Na_(2)B_(4)O_(7))`
`Na_(2)underset("Borax")(B_(4)O_(7)).10H_(2)O overset(Delta)rarr underset(underset("borax")"Anhydrous")(Na_(2)B_(4)O_(7))+10H_(2)Ouarr`

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