Na2SO3 + H2SO4 → SO2 + Na2SO4 + H2O – Balanced equation

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This is an acid-base reaction (neutralization): Na2SO3 is a base, H2SO4 is an acid.

Reactants:

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  • Na2SO3Sodium sulfite
    • Other names: Sodium sulphite , Hypo clear (photography) , E221
    • Appearance: White solid ; White crystals or powder
  • H2SO4Sulfuric acid
    • Other names: Oil of vitriol , Sulfuric acid, concentrated (> 51% and , H2SO4
    • Appearance: Clear, colorless liquid ; Odourless colourless oily hygroscopic liquid ; Colorless to dark-brown, oily, odorless liquid. [Note: Pure compound is a solid below 51°F. Often used in an aqueous solution.]

Products:

  • 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.]
  • Na2SO4
    • Names: Sodium sulfate , Sodium sulphate , Sulfate of sodium
    • Appearance: White crystalline solid | hygroscopic ; White hygroscopic solid in various forms
  • 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
READ  Na2CO3 + H2O → NaHCO3 + NaOH – Balanced equation
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