... 5 .6 gam C 13.4 gam D 8 .6 gam Gii NaOH+H2SNaHS+H2O(1) 2NaOH+H2SNa2S+2H2O(2) Lõp t l: nOH / n H2S =p p p (1) p p (2) bi ( 166 ), (172 ), (177 ) - HS di lp tr li mt s cõu trc nghim SGK trang 1 56, 165 , ... sau: Cu 2S, FeS2, NaHSO4, (NH4)2S2O8, Na2SO3 ln lt l: A -4, -2, +6, +7, +4 B -4, -1, +6, +7, +4 C -2, -1, +6, +6, +4 D -2, -1, +6, +7, +4 Cõu Ho tan 33,8 gam oleum H2SO4.nSO3 vo nc, sau ú cho ... H2S, SO2, SO3, H2SO4 -2 +4 +6 +6 H2S, SO2, SO3H2SO4 Nhng hp cht ca lu hunh: H2S, SO2, SO3, H2SO4 - S cú s oxi hoỏ trung gian va cú tớnh oxi hoỏ va cú tớnh kh -2 +4 +6 +6 H2S, SO2, SO3H2SO4 Bi gii...