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Question

Represent HAuCl4using stock notation.


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Solution

Stock notation:

  1. Stock notation is a method in chemical nomenclature that uses a Roman numeral to represent the oxidation state of a major element in a compound or ion.
  2. Using this method it is easier to understand the oxidation number of metals in compounds.

HAuCl4:

  1. The HAuCl4 is a neutral chemical in which the central atom is Au, which is connected to hydrogen and a chlorine atom.
  2. Let the oxidation number of Au be “x”.
  3. Oxidation State of Au=Valency of Hydrogen+Oxidation number of Au+4×Valency of Chlorine0
  4. 0=+1+x+4(-1),x=+3
  5. Therefore, the Oxidation state ofAu=+3, Stock notation is HAu(III)Cl4

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