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The correct formula of borax is...

The correct formula of borax is

A

`Na_(2)[B_(4)O_(5)(OH)_(2)].8H_(2)O`

B

`Na_(2)[B_(4)O_(6)(OH)_(6)].9H_(2)O`

C

`Na_(2)[B_(4)O_(4)(OH)_(8)].7H_(2)O`

D

`Na_(2)[B_(4)O_(3)(OH)_(4)].6H_(2)O`

Text Solution

Verified by Experts

The correct Answer is:
A
It is made up of two triangular and two tetrahedral units. The anion is `[B_(4)O_(5)(OH)_(4)]^(2-)`. The other water molecules are associated with the `Na^(+)` ions.
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