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What are the classifications of H2SO3, KBrO3, HBrO3 and Ba(OH)2 as ionic, molecular, acid or base?

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Here are the classifications for each of the compounds you've listed:

  1. H₂SO₃ (sulfurous acid): This is a molecular compound and an acid. It is referred to as a weak acid because it does not completely ionize in solution.

  2. KBrO₃ (potassium bromate): This is an ionic compound. It is composed of potassium ions (K⁺) and bromate ions (BrO₃⁻).

  3. HBrO₃ (bromic acid): This is also a molecular compound and an acid. It is a strong acid, which means it completely ionizes in solution.

  4. Ba(OH)₂ (barium hydroxide): This is an ionic compound and a base. It dissociates in water to produce barium ions (Ba²⁺) and hydroxide ions (OH⁻).

To sum up:

  • H₂SO₃: molecular acid
  • KBrO₃: ionic compound
  • HBrO₃: molecular acid
  • Ba(OH)₂: ionic base