... 17 ,94 = 0,23 (mol) 78 Bi toỏn phi xột trng hp: TH1: AlCl3 cha b phn ng ht (2) khụng cú phn ng (3) 3 0, 69 T (2): n M(OH) = n Al(OH) = 0, 23 = n n T (1): n M = n M(OH) = n n 1,0 n 0, 69 n 0, 69 ... T (1): n M = n M(OH) = n n 1,0 n 0, 69 n 0, 69 M M = 26 ,91 = 39 n n Vi n = M = 39 M l: K Vi n = M = 78 loi 1 Theo (1): n H2 = n K = 0, 69 = 0,345 (mol) V = 8,268 lớt 2 TH2: AlCl3 phn ng ht ... hn 16,8 (g) chng t (4) cú xy v lng Fe b ho tan (4) = 16,8 12,6 = 4,2 (g) Trang 3/ - THCS - Bảng A 1,0 0,075 (mol) t (4): n Fe (SO ) = nFe b ho tan = 0,075 (mol) Tng n Fe (SO ) 300 ml ddE...