Sunday, August 19, 2012

Aqua Regia

Introduction




Theoretically, Gold and Platinum are noble metals, which hardly reacts with acid or base solution, however, scientists  developed a solution of nitric acid and hydrochloric acid with 1:3 volume ratio (HNO3+ 3HCl). This solution is called Nitric acid hydrochloride or Aqua Regia in common.

Reaction: Au + HNO3 + 3HCl --> AuCl3 + NO+ 2H2O

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