高三寒假化学复习计划04月18日(国外英文资料).docVIP

高三寒假化学复习计划04月18日(国外英文资料) The Zhang Bei study program is shared every day Aqueous solution) Electrode equation An electrolytic substance A general chemical equation or ion equation Electrolyte concentration Solution pH Electrolyte solution recovery An oxygen-containing acid (such as H2SO4) Anode: 4OH4e===O2 = 2H2O Cathode: 4H4e===2H2 have water 2H2O (electrolytic electrolytic solution) O2 = = 2H2 Enlarge Reduce Plus H2O Strong base (such as NaOH) Anode: 4OH4e===O2 = 2H2O Cathode: 4H4e===2H2 have water 2H2O (H O2 = electrolytic electrolysis) 2H2 have Enlarge Enlarge Plus H2O A reactive salt of metals (such as KNO3, Na2SO4) Anode: 4OH4e===O2 = 2H2O Cathode: 4H4e===2H2 have water 2H2O (electrolytic electrolytic spp.) O2 = = 2H2 Enlarge Unchanged Plus H2O Deoxygenated (such as HCl), except HF Anode: 2Cl2e===Cl2 have Cathode: 2H2e===H2 have acid 2HCl (L Cl2 = electrolytic electrolysis) = + H2 Reduce Enlarge Pass in HCl gas Inert metal hydrogen acid salt (such as CuCl2), excluding fluoride Anode: 2Cl2e===Cl2 have Cathode: Cu22e===Cu salt CuCl2 (L = CuCl2 electrolytic electrolysis) Reduce Plus CuCl2 Deoxygenated active metal salt (such as NaCl) Anode: 2Cl2e===Cl2 have Cathode: 2H2e===H2 have Water and salt 2Cl2H2O electrolysis (Cl2 = electrolytic L) + H2 = 2OH Generate new electrolyte Enlarge Pass in HCl gas An inactive metal containing an oxygen salt (such as CuSO4) Anode: 4OH4e===O2 = 2H2O Cathode: 2Cu24e===2Cu Water and salt 2Cu2 + + 2H2O (2Cu + O electrolytic electrolysis) = O2 + 4H + Generate new electrolyte Reduce Plus CuO or CuCO3 What is the essence of the H2 type and the O2 acid type in the 2. electrolysis process? Put H2 in electrolysis alkali type, if drops of phenolphthalein ts, which one near solution turns red? Answer H2 alkaline ionized water is H + discharge at the cathode, destroy the ionization equilibrium of water near the cathode, the OH concentration increases, if the drops of phenolphthalein ts, near the cathode solution turned red; essence of O2 acid