Question

identify the catinoic and anionic radical in given unknown salt A by performing dry and wet test for catinoic radical and anionic radical

Answer 1

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Dry test :
Borax bead test :- Borax (Na2B4O7.10H2O) is the first heated on pt wire where it is dehydrate completely forming glass like beads consisting NaBO2 and B2O3. The beads is then mixed with salt to be tested and heated further where colored metal metaborates are formed e.g., CuO + B2O3 -----> Cu(BO2)2 -- {GREEN IN HOT AND BLUE IN COLD}
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