Strength of Acids and Bases (VCE SSCE Chemistry): Flashcards

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Strength of Acids and Bases
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Brønsted-Lowry definition of acid

Substances that donate protons (H⁺ ions)

Brønsted-Lowry definition of base

Substances that accept protons (H⁺ ions)

What strong acids do when dissolved in water

Ionise completely (complete ionisation)

Three common strong acids

HCl\text{HCl}, HNO3\text{HNO}_3, H2SO4\text{H}_2\text{SO}_4

What weak acids do when dissolved in water

Ionise only partially (partial ionisation)

Common example of a weak acid

Ethanoic acid (CH3COOH\text{CH}_3\text{COOH})

Arrow symbol showing complete ionisation

Single arrow (→)

Arrow symbol showing partial ionisation

Double arrow (⇌)

Most common weak base

Ammonia (NH3\text{NH}_3)

Relationship: strong acid & its conjugate base

Stronger the acid, weaker its conjugate base

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