Write down the reaction equations characterizing the preparation and properties of salts according to the following schemes, indicate the type of reactions according to the “number and composition of the starting materials and reaction products”, as well as the names of the compounds.
a) 2NaNO3 = 2NaNO2 + O2; Decomposition reaction. Sodium nitrate, sodium nitrite and oxygen.
b) 2HCl + CaCO3 = CaCl2 + H2O + CO2; Exchange reaction. Hydrochloric acid, calcium carbonate, calcium chloride, water and carbon dioxide.
c) BaCl2 + H2SO4 = BaSO4 + 2HCl; Exchange reaction. Barium chloride, sulfuric acid, barium sulfate and hydrochloric, or hydrochloric, acid.
d) 3CuCl2 + 2Al = 2AlCl3 + 3Cu; Substitution reaction. Copper (II) chloride, aluminum, aluminum chloride and copper.
e) 2Na2O + P2O5 = 2Na3PO4. Compound reaction. Sodium oxide, phosphorus (V) oxide, sodium phosphate.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.