Aqueous solution of borax is...

Aqueous solution of borax is

neutral

acidic

alkaline

strongly acidic

Text Solution

Verified by Experts

The correct Answer is:

Borax is a salt of strong base `(NaOH)` and weak acid (boric acid). Therefore, in aqueous solution, it undergoes hydrolysis to give alkaline solution:
`Na_(2)B_(4)O_(7) + 7H_(2)O rarr 2NaOH + 4H_(3)BO_(3)` Therefore, borax is used as a water softener and cleansing agent.

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When aqueous solutions of borax is acidified with HCl, we get

`B_(2)H_(6)`

`H_(3)BO_(3)`

`B_(2)O_(3)`

`All of these

Aqueous solution of borax reacts with two mol of acids .This is because of

formation of `2` mol of `B(OH)_(3)` only

formation of `2` mol of `[B(OH)_(4)]^(Theta)` only

formation of `1` mol each of `B(OH)_(3)` and` [B(OH)_(4)]^(Theta)`only

formation of `2` mol each of `[B(OH)_(4)]^(Theta)` and `B(OH)_(3)` of which `[B(OH)_(4)]^(Theta)` reacts with acid

Aqueous solution of borax reacts with two mol of acids. This is because of :

Formation of 2 mol of `B(OH)_(3)` only

Formation of 2 mol of `[B(OH)_(4)]^(-)` only

Formation of 1 mol each of `B(OH)_(3)` and `[B(OH)_(4)]^(-)`

Formation of 2 mol each of `[B(OH)_(4)]^(-)` and `B(OH)_(3)` of which only `[B(OH)_(4)]^(-)` reacts with acid