... Na+, NH+4, CO 2-3 , CH3COO-, HSO-4, Cl-, K+, HCO-3 Hãy cho biết ion bazơ? A NH+4, CO 2-3 , CH3COO-, HSO-4, Cl-, HCO-3 B CO 2-3 , CH3COO-, HSO-4, HCO-3 2C CO 3, CH3COO , HCO D CO 2-3 , CH3COO- Câu 34 X este ... CH3O-CO-(CH2)3-CO-OC2H5 B CH3CH2CH2 O-CO-CH2 -CO-OC2H5 C B CH3CH2CH2 O-CO-(CH2)2-CO-OCH3 D CH3CH(CH3 )- O-CO-CH2 -CO-OC2H5 Câu 21 Có dung dịch sau: Ba(OH)2, NH4Cl, NaCl, HCl (NH4)2SO4 Hoá chất sau sử dụng để ... NH+4, CO 2-3 , CH3COO-, HSO-4, Cl-, HCO-3 B CO 2-3 , CH3COO-, HSO-4, HCO-3 2C CO 3, CH3COO , HCO D CO 2-3 , CH3COO- + + 2+ Câu 52 Cho ion sau: Na , NH 4, CO 3, CH3COO , HSO 4, Cl , K , HCO-3 Hãy cho...