Gửi lúc - 15/08/2002 : 09:42:51
Co' the ma cung khong hieu. Mot tinh yeu dich thuc thi it khi bi chi phoi boi DK ben ngoai nen cha the nao dung chat xuc tac duoc. Neu co thi cung nhu la cho BaSO4 vao` cac loai axit thoi.
Gửi lúc - 17/08/2002 : 18:00:12
Noi chung tui thi chua yeu bao gio nen toi cung chang quan tam lam , nhung tui nghi a neu coi dk ben ngoai la chat xuc tac cho TY thi cung duoc day chu , co ai dinh nghia la "chat xuc tac cua tinh yeu " fai la loai chat gi dau co chu
Gửi lúc - 18/08/2002 : 20:10:07
VO VAN SAO CO NHUNG CHU DE NHU THE NAY CO CHU LAM TRAT CHO CUA FORUM MONG CAC BAN GIUP KINH NGIEM CHO .CAO LOI .TOI VUI TINH LAM NHUNG KHONG THE CHAP NHAN CAI KIEU THAO LUAN DO OM CUA BAN
Gửi lúc - 20/08/2002 : 22:59:55
Tu tu roi hang~ close this topic. Hehe, em xin man fep neu them 1 chut. Cai BaSO4 ko con la chat ben vung trong cac dung dich nua. Dung dich EDTA hoan toan co kha nang hoa tan BaSO4. Ngoai ra, dd Na2CO3 bao hoa, cho BaSO4 vao, roi cho len may' ly tam thi se thu duoc BaCO3. Cham het!
hoa hoc
Gửi lúc - 13/08/2002 : 17:23:16 
