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10.2. Strong and Weak Acids

10.2. Strong and Weak Acids. LO: I understand the difference between strong and weak acids. 10.2.1 Strong Acids. Hydrochloric acid. A strong acid is one that completely splits up into ions when dissolved in water:. +. HCl(aq). H + (aq). Cl - (aq). Sulphuric acid. +. H 2 SO 4 (aq).

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10.2. Strong and Weak Acids

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  1. 10.2. Strong and Weak Acids LO: I understand the difference between strong and weak acids.

  2. 10.2.1 Strong Acids • Hydrochloric acid A strong acid is one that completely splits up into ions when dissolved in water: + HCl(aq) H+(aq) Cl-(aq) • Sulphuric acid + H2SO4(aq) 2H+(aq) SO42-(aq) • Nitric acid + HNO3(aq) H+(aq) NO3-(aq) Strong acids 100% into ions. dissociate LO: I understand the difference between strong and weak acids.

  3. 10.2.2 Weak Acids dissociates A weak acid is one that only partially . into ions when dissolved in water. An is produced where most of the particles present are molecules and not ions. equilibrium • Ethanoic acid + CH3COOH(aq) H+(aq) CH3COO-(aq) LO: I understand the difference between strong and weak acids.

  4. Other weak acids include: • carbonic acid + + CO2(aq) H2O(l) 2H+(aq) CO32-(aq) • sulphurous acid + + SO2(aq) H2O(l) 2H+(aq) SO32-(aq) LO: I understand the difference between strong and weak acids.

  5. Reaction with Magnesium Acid pH Conductivity Ethanoic Hydrochloric 10.2.3 Comparing Strong and Weak Acids Reactions of Acids In comparison to a strong acid, a weak acid: 4 low slow 2 high fast • Has a pH higher lower • Has a conductivity slower • Reacts at a rate. LO: I understand the difference between strong and weak acids.

  6. Titrations: stoichiometry The proportions of the substances reacting together in a reaction is known as the . The volume of 0.1M acid needed to neutralise 10cm3 of 0.1M sodium hydroxide is: • cm3 for strong (hydrochloric) acid 10 • cm3 for weak (ethanoic) acid 10 The stoichiometry is for equimolar strong and weak acids. identical LO: I understand the difference between strong and weak acids.

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