How many grams of borax `(Na_2B_4O_7.10H_2O)` are required to neutralise 25 " mL of " 0.2 M HCl and `H_2SO_4` separately?

Explanation

Borax in water gives
`underset((1 mol))(B_4O_7^(2-))+7H_2Oto4H_3BO_3+underset(2 mol)(2overset(ɵ)(O)H)`
1 " mol of "borax `-=2 mol overset(ɵ)(O)Himplies` acidity `=2`
(a). m" Eq of "borax `=m" Eq of "HCl`
`("weight")/((382)/(2))xx1000=(0.2xx2)xx25`
[Since HCl is a monobasic acid]
Weight `=0.955g=` Mass of borax
(b). m" Eq of "borax `=m" Eq of "H_2SO_4`
`("weight")/((382)/(2))xx1000=(0.2xx2)xx25`
[Since `H_2SO_4` is a dibasic acid]`
Weight `=1.91g=` mass of borax