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Question
(a) What is meant by the term 'electrolyte'?
(b) What are the particles present in a compound which is a non-electrolyte?
(c) If an electrolyte is described as a 'strong electrolyte', what does this mean?
(b) What are the particles present in a compound which is a non-electrolyte?
(c) If an electrolyte is described as a 'strong electrolyte', what does this mean?
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Solution
(a) An electrolyte can be an ionic compound or a polar covalent compound which is soluble in water. In solution it furnishes cations (positively charged ions) and anions (negatively charged ions). The presence of these ions in molten or aqueous state of the electrolyte is responsible for electrical conductivity of the electrolyte. Some examples are dil. HCl, NaCl and NaOH solutions, etc.
(b) The particles present in a compound that is a non-electrolyte are called molecules. As non-electrolytes do not contain ions, they do not ionise. Some examples are alcohol, pure water and urea.
(c) Substances that dissociate completely into ions in an aqueous solution are called strong electrolytes. The amount of ions present in them is very high and thus they conduct a large amount of electricity. Some examples of strong electrolytes are solutions of dil. HCl, NaOH, NaCl, etc.
(b) The particles present in a compound that is a non-electrolyte are called molecules. As non-electrolytes do not contain ions, they do not ionise. Some examples are alcohol, pure water and urea.
(c) Substances that dissociate completely into ions in an aqueous solution are called strong electrolytes. The amount of ions present in them is very high and thus they conduct a large amount of electricity. Some examples of strong electrolytes are solutions of dil. HCl, NaOH, NaCl, etc.
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