During the borax bead test with CuSO_4,a blue | vedclass

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Question

(C) The borax bead test involves the formation of metal metaborates.When $CuSO_4$ is heated,it decomposes to form copper$(II)$ oxide:$CuSO_4 \xrightar

Vedclass · Accepted Answer

$Cu(BO_2)_2$

Vedclass · Answer

(C) The borax bead test involves the formation of metal metaborates.When $CuSO_4$ is heated,it decomposes to form copper$(II)$ oxide:$CuSO_4 \xrightarrow{\Delta} CuO + SO_3$Then,$CuO$ reacts with boron trioxide $(B_2O_3)$,which is formed from the decomposition of borax,to produce copper$(II)$ metaborate:$CuO + B_2O_3 \rightarrow Cu(BO_2)_2$The blue-green colour of the bead in the oxidising flame is due to the formation of $Cu(BO_2)_2$.

During the borax bead test with $CuSO_4$,a blue-green colour of the bead was observed in the oxidising flame due to the formation of:

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