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Bases

Bases. In aqueous solutions H 2 O donates H + (H 2 O acts as an acid) and OH - ions are formed. In a solution where H 2 O donates H + it is said to be basic or alkaline. Ammonia solution. base acid NH 3 + H 2 O  NH 4 + + OH -

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Bases

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  1. Bases • In aqueous solutions H2O donates H+(H2Oacts as an acid) and OH- ions are formed. • In a solution where H2O donates H+ it is said to be basic or alkaline. 12 Chemistry 2.6 rxn rates, eqm, acids and bases CR 07

  2. Ammonia solution • base acid • NH3 + H2O  NH4+ + OH- • not all NH3 accept H+ • -in fact only a few do 12 Chemistry 2.6 rxn rates, eqm, acids and bases CR 07

  3. Ammonia is a weak base • Ammonia is a weak base because it does not fully dissociate. • The solution is basic because there are OH- ions in it. • In truth there is more NH3 + H2O than NH4+ + OH- 12 Chemistry 2.6 rxn rates, eqm, acids and bases CR 07

  4. CO32- - Carbonate ion • CO32- + H2O  HCO3- + OH- • This is a basic solution 12 Chemistry 2.6 rxn rates, eqm, acids and bases CR 07

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