必修I 化学反应及离子反应（Required I chemical reaction and ion reaction）.doc

必修I 化学反应及离子反应（Required I chemical reaction and ion reaction） The required I chemical reactions and ion reactions Equation summary Written: xiao siguo The reaction of sodium and its compounds 1. The sodium gets darker in the air 4Na + O2 = 2Na2O Sodium burns in the air (yellow flame) 2Na + O2 ignites Na2O2 Na2O is heated in the air (turning yellow) 2Na2O + O2 = 2Na2O2 2. Sodium and water reaction (floating, melting, swimming, ringing, red) 2Na + 2H2O = 2NaOH + H2 2Na + 2H2O = 2Na + + 2oh-+ H2 The reaction of sodium and copper sulfate solution: 2Na + 2H2O + CuSO4 = Cu (OH) 2 The reaction of sodium and iron chloride solution: 6Na + 6H2O + 2FeCl3 = 2Fe (OH) 3 3. The reaction of sodium peroxide to water 2Na2O2 + 2H2O = 4NaOH + O2 2Na2O2 + 2H2O = 4Na + + 4OH + O2 (exothermic reaction, Na2O2 is a powerful oxidant for bleaching) The reaction of alkaline oxide Na2O with water Na2O + H2O = 2NaOH 4. Sodium peroxide can be used as a source of oxygen in breathing masks and submarines. The reason is: 2Na2O2 + 2CO2 = 2Na2CO3 + O2 5. Soda (soda) reacts with hydrochloric acid A pure alkaline solution of hydrochloric acid Na2CO3 + 2HCl = 2NaCl + H2O + CO2 CO32 - + 2H + = H2O + CO2 The drops of hydrochloric acid in a soda solution are overdose Na2CO3 + HCl = NaHCO3 + NaCl CO32 - + H + = HCO3 - NaHCO3 + HCl = NaCl + H2O + CO2 HCO3 - + H + = H2O + CO2 arrow 6. Baking soda to heat up 2NaHCO3 heating Na2CO3 + H2O + CO2 arrow 7. The solid sodium hydroxide and sodium bicarbonate mixture are heated in the closed container NaHCO3 + NaOH is heating Na2CO3 + H2O HCO3 - + OH - = H2O + CO32 - (if the solution has an ion equation) 8, NaHCO3 and Ca (OH) 2 reactions: The insufficiency of NaHCO3 ion reaction equation: HCO3 - + OH - + Ca2 + = H2O + CaCO3 NaHCO3 excessive ion reaction equation 2HCO3 - + 2OH - + Ca2 + = 2H2O + CaCO3 + CO32 - 9. Reaction of calcium chloride and sodium carbonate solution: CO32 - + Ca2 + = CaCO3 Metal lithium burns in the air 4Li + O2 heating 2Li2O 11. The ionization equat