Unformatted text preview: dissociation took place) Soluble metallic hydroxides, completely separated in aqueous solution are called strong bases Chemistry 52 EXPERIMENT #2 +
Other substances, although they do in fact produce hydrogen ions, H , when dissolved in water, dissociate only partially. Such substances are called weak acids. It follows that weak acids are weak electrolytes. For example, carbonic acid, H2CO3, found in carbonated beverages, is a weak acid. [H2CO3 forms when CO2 reacts with water according to: CO2(g) + H2O(l) ──────>H2CO3(aq)] H2CO3(aq) carbonic acid partial dissociation +
< ─────────────── H (aq) + HCO3 ─ (aq) ──> hydrogen ion hydrogen carbonate ion (bicarbonate ion) The double arrows in the equation for the partial dissociation of carbonic acid indicate that the dissociation reaction for this substance reaches equilibrium. +
At equilibrium, a certain fixed concentration of hydrogen ion, H , is present. The equilibrium lies well to the left (as...
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