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Download Identifying an electrolyte Difference between strong and weak electrolytes Memorize
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Identifying an electrolyte Difference between strong and weak electrolytes A) Is the compound ionic or molecular? Ionic: it is a strong electrolyte Note: it could be insoluble Molecular ??? Assume all salts are strong electrolytes. Memorize strong acids and bases B) If it is molecular, is it an acid or a base? Yes: it is a strong or weak electrolyte No: it is a non electrolyte. Examples Acids Bases Salts of electrolytes (strong or weak) donate H+(aq) accept H+(aq) formed by replacing one or more H+ of an acid with another cation Examples of non-electrolytes: Alcohols Carbohydrates (sugar) Aldehydes, ketones Table 5.2 of Moore, Stanitski, Jurs Table 4.1 of Brown, LeMay, Bursten If a compound is an acid or a base, but NOT one of the strong acids or bases, then it MUST be a weak electrolyte. Common misconception: Electrolytes are ionic compounds NOT TRUE • Strong electrolytes – ionic or molecular compounds that ionize completely in solution. • Weak electrolytes– molecular compounds that are partially ionized in solution. • Nonelectrolytes – molecular compounds that do not ionize in solution Mary Bojan 09/06/01 Mary Bojan 09/06/01 Water soluble Compound molecular ionic Is it an acid? Yes No Is it a strong acid? Strong electrolyte Is it a molecular base? (eg. NH3) Yes no Strong Electrolyte weak electrolyte yes weak electrolyte Mary Bojan no non electrolyte 09/06/01
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