1.

Why an aqueous borax solution is alkaline to litmus?

Answer»

Solution :`B_4 O_(7)^(2-)` is CONJUGATE base of weak ACID tetraboric acid. Due to anion hydrolysis, the AQUEOUS solution of borax is basic.
` B_(4)O_(7)^(2-) +7H_2 O hArr2OH^(-) +4H_3 BO_(3)`.


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