So fill in: 6CaO+6SO6+O6? High temperature? . ? Calcium hexasulfate.
(6) Sodium sulfite reacts with dilute hydrochloric acid to generate sodium chloride, water and carbon dioxide. The chemical equation of this reaction is Na2SO4+67cl ═ 6 NaCl+76o+SO6 ↑.
Therefore, fill in: na6so4+67cl ═ 6NaCl+76o+SO6 ↑.
have a guess
Acid rain only contains sulfurous acid, so the salt is potassium sulfite; Acid rain only contains sulfuric acid, so the salt is potassium sulfate; Acid rain contains sulfurous acid and sulfuric acid, so the salt is potassium sulfite and potassium sulfate.
Therefore, only K6SO4. ..
Experimental inquiry
6.5 The fruit solution contains potassium sulfite. When enough dilute sulfuric acid is dripped into test tube A, the excess potassium hydroxide is neutralized by dilute sulfuric acid and reacts with potassium sulfite to generate potassium sulfate, water and sulfur dioxide, which can make magenta solution fade. The observed experimental phenomena are: bubble generation and magenta solution fading.
Therefore, filling: bubbles are generated and the magenta solution fades.
4. Add enough barium chloride solution to test tube B, and then add enough dilute nitric acid. After white precipitate appeared, gas was generated, and the precipitate was partially dissolved, which proved that it contained potassium sulfite and potassium sulfate, because after adding sufficient barium chloride solution, potassium sulfite reacted with barium chloride to generate barium sulfite precipitate and potassium chloride, and potassium sulfate reacted with barium chloride to generate barium sulfate precipitate and potassium chloride. When adding enough dilute nitric acid to neutralize potassium hydroxide, dilute nitric acid can react with barium sulfite to produce nitrate.
Therefore, fill in: sufficient barium chloride solution; Dilute nitric acid.