2.31: Know that Acids in Aqueous Solution are a Source of Hydrogen Ions and Alkalis in a Aqueous Solution are a Source of Hydroxide Ions

ACIDS AND ALKALIS

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• When atoms or groups of atoms lose or gains Electrons, they form charged particles called Ions - either positively or negatively charged

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*ACIDS:

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• When Acids dissolve in Water to form an Aqueous Solution, they produce Hydrogen ions (H+) which makes the Aqueous Solution Acidic

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    Example: Hydrochloric Acid

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HCl (aq)   →    H+ (aq)    +    Cl- (aq)

    

    *Acids are often produced from Non-Metal Oxides, E.g Sulfur Oxides produce    

     Sulfuric Acid

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*ALKALIS:

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• When Alkalis dissolve in Water to form an Aqueous Solution, they produce Hydroxide ions ( OH- ) which makes the Aqueous Solution an Alkali

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    Example: Sodium Hydroxide

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NaOH (aq)   →    Na+ (aq)    +    OH- (aq)