Suggest explanations for the following facts.
Na[BH4] is very much less rapidly hydrolysed by H2O than is Na[AlH4].
The rate of hydrolysis of B2H6 by water vapour is given by the equation:
Rale oc (PB2H6)1/2(PH2O)
A saturated aqueous solution of boric acid is neutral to the indicator bromocresol green (pH range 3.8-5.4), and a solution of K|HF2| is acidic to this indicator. When excess boric acid is added to a solution of K[HF2], the solution becomes alkaline to bromocresol green.
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