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( begin array c 200 ~cm^ 3 0.05 M AlCl_ 3 ~A- দ্রবণ end array ) ( begin array c 300 ~cm^ 3 0.02 M NH_ 4 OH B- overline দ্রবণ end array ) ( begin array c Al(OH)_ 3 ~K_ sp =3.7 times | Suva Ai