Role of Water in Showing Acidic and Alkaline Properties (3)

Chemistry

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The reason which potassium hydroxide, KOH and sodium hydroxide, NaOH are alkalis

Because they are soluble in water

Definition of alkali

Chemical substances that ionise in water to produce hydroxide ions, OH–

The Role of Water to Show Acidity and Alkalinity (1)

Acids only show acidic properties in the presence of water

The Role of Water to Show Acidity and Alkalinity (2)

When an acid is dissolved in water, acid molecules will ionise to produce hydrogen ions, H+

The Role of Water to Show Acidity and Alkalinity (3)

The presence of hydrogen ions H+allows the acid to show its acidic properties

The Role of Water to Show Acidity and Alkalinity (4)

Blue litmus paper changes to red to indicate its acidic nature in the presence of water

The Role of Water to Show Acidity and Alkalinity (5)

Without water, solid oxalic acid, C2H2O4 only exist as molecules and hydrogen ions, H+ are not present

The Role of Water to Show Acidity and Alkalinity (6)

The colour of blue litmus paper remains unchanged

The Role of Water to Show Acidity and Alkalinity (7)

Akalis only shows alkaline properties when they are dissolved in water

The Role of Water to Show Acidity and Alkalinity (8)

Without water, hydroxide ions, OH– in the sodium hydroxide pellet, NaOH cannot move freely and are still tied in its lattice structure

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