CaSO3 + 2 HCl → CaCl2 + SO2 + H2O – Balanced equation

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Reactants:

  • CaSO3Calcium sulfite
    • Other names: Sulfurous acid , Calcium salt (1:1) , E226
    • Appearance: White solid
  • HClChlorane , Hydrogen chloride
    • Other names: Hydrochloric acid , M , Uriatic acid
    • Appearance: Colorless, transparent liquid, fumes in air if concentrated ; Colorless gas ; Colourless compressed liquefied gas with pungent odour ; Colorless to slightly yellow gas with a pungent, irritating odor. [Note: Shipped as a liquefied compressed gas.]

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  • CaCl2Calcium chloride
    • Other names: Calcium(II) chloride , Calcium dichloride , E509
    • Appearance: White powder, hygroscopic ; Odourless hygroscopic colourless or white crystals
  • SO2Sulfur dioxide
    • Other names: Sulfurous anhydride , Sulphur dioxide , Sulfurous acid anhydride
    • Appearance: Colorless gas ; Colourless gas or compressed liquefied gas with pungent odour ; Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.]
  • H2OWater, oxidane
    • Other names: Water (H2O) , Hydrogen hydroxide (HH or HOH) , Hydrogen oxide
    • Appearance: White crystalline solid, almost colorless liquid with a hint of blue, colorless gas
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