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When carbon dioxide gas dissolves in water, it forms a weak acid solution due to a reversible reaction. The hydrogen ion concentration in solution depends on the amount of dissolved carbon dioxide. In this demonstration, the effect of pressure on the solubility of carbon dioxide and on the position of equilibrium for this reversible reaction will be observed.


  • Equilibrium
  • Solubility
  • Gases
  • Acids & Bases
  • Indicators
  • LeChâtelier’s Principle