... ho| ca clo c|c cht: HCl, KClO3, HClO, HClO2, HClO4 ln lt l{: A +1, +5, -1 , +3, +7 B -1 , +5, +1, -3 , -7 C -1 , -5 , -1 , -3 , -7 D -1 , +5, +1, +3, +7 C}u 4: C|c nguyờn t ph}n nhúm chớnh nhúm VIIA cú ... 3) S + NaOH Na2S + Na2S2O3 + H2O 4) Cr(OH)3 + ClO- + OH CrO4 2- + Cl- + H2O 5) MnO2 + ClO- + OH- MnO 4- + Cl- + H2O 6) NH4Cl + ClO- + OH N2 + Cl- + H2O 7) Al + KNO3 + KOH KAlO2 + NH3 8) Al + NaNO3 ... dung dch t ú thit lp phng trỡnh tng in tớch dng bng tng in tớch }m Khi cú s thay th c|c ion thỡ mi quan h gia chỳng l{: Vi anion: O 2- 2Cl-; O 2- 2NO 3-; O 2- SO4 2-; 2Cl- SO4 2- Vi cation: 2Na+...