Ions - simple charged particles or not

Some simple basic properties of ions are regularly used in the discussion of electrolyte solutions and in theories describing the behaviour of electrolyte solutions. These ideas are often physically naive and must be modified before a physically realistic description of electrolyte solutions can be given. 

These properties are summarised below with indications of which are naive. A very brief indication of which modifications will be needed is given after the summary. Full discussion of these points is dealt with in later chapters. 

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