Q.

How many moles of HCl react with one mole of borax to boric acid?

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a

3

b

4

c

2

d

9

answer is C.

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Detailed Solution

Following is the hydrolysis process when borax is dissolved in water.Na2B4O7+7H2O→4H3BO3+2NaOHTherefore, two moles  of  HCl will be required to neutralize the borax solution.
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