differentiate between strong acids and weak acids
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Difference between strong acids and weak acids is:
A strong acid is completely (100%) ionised. An example of a strong acid is hydrochloric acid. A strong acid has a pH of 1.
hydrogen chloride (in water) ------> hydrogen ion + chloride ion
HCl(aq) ------> H+(aq) + Cl-(aq)
All of the hydrogen chloride molecules become hydrogen ions and chloride ions when they are dissolved in water.
A weak acid is only partly (less than 100%) ionised. An example of a weak acid is ethanoic acid. A weak acid has a pH of 3 to 5.
ethanoic acid (in water) ↔ hydrogen ion + ethanoic ion
CH3CO2H(aq) ↔ H+(aq) + CH3CO2-(aq)
Some of the ethanoic acid molecules become ions in water but most of them stay as molecules. The reaction is reversible.
A strong acid is completely (100%) ionised. An example of a strong acid is hydrochloric acid. A strong acid has a pH of 1.
hydrogen chloride (in water) ------> hydrogen ion + chloride ion
HCl(aq) ------> H+(aq) + Cl-(aq)
All of the hydrogen chloride molecules become hydrogen ions and chloride ions when they are dissolved in water.
A weak acid is only partly (less than 100%) ionised. An example of a weak acid is ethanoic acid. A weak acid has a pH of 3 to 5.
ethanoic acid (in water) ↔ hydrogen ion + ethanoic ion
CH3CO2H(aq) ↔ H+(aq) + CH3CO2-(aq)
Some of the ethanoic acid molecules become ions in water but most of them stay as molecules. The reaction is reversible.
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