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Preparation of aqua regia?
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Preparation of aqua regia?
Aqua regia is an extremely corrosive mixture of nitric and hydrochloric acid, used as an etchant, for some analytical chemistry procedures, and to refine gold. Aqua regia dissolves gold, platinum, and palladium, but not the other noble metals. Here's what you need to know to prepare aqua regia and use it safely.
Reaction to Make Aqua Regia
Here is what happens when nitric acid and hydrochloric acid are mixed:
HNO3 (aq) + 3HCl (aq) → NOCl (g) + 2H2O (l) + Cl2 (g)
Over time, nitrosyl chloride (NOCl) will decompose into chlorine gas and nitric oxide (NO). Nitric acid auto-oxidizes into nitrogen dioxide (NO2):
2NOCl (g) → 2NO (g) + Cl2 (g)
2NO (g) + O2 (g) → 2NO2(g)
Nitric acid (HNO3), hydrochloric acid (HCl), and aqua regia are strong acids. Chlorine (Cl2), nitric oxide (NO), and nitrogen dioxide (NO2) are toxic.
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Most Upvoted Answer
Preparation of aqua regia?
Mix the solution in a hood with the sash between you and the solution. ... When preparing theaqua regia solution, always add the nitric acid to the hydrochloric acid slowly. Dissolving metals inaqua regia releases toxic gases, always work with aqua regia in a fumehood.
Community Answer
Preparation of aqua regia?
Aqua regia must be prepared and used in a fume hood. To prepare, combine three (3) parts of hydrochloric acid to one (1) part nitric acid in a glass container. The hydrochloric acid must be measured into the glassware first, and then the nitric acid is slowly added. Never exceed 38% nitric acid.
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Preparation of aqua regia?
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Preparation of aqua regia? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Preparation of aqua regia? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Preparation of aqua regia?.
Preparation of aqua regia? for Class 10 2024 is part of Class 10 preparation. The Question and answers have been prepared according to the Class 10 exam syllabus. Information about Preparation of aqua regia? covers all topics & solutions for Class 10 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Preparation of aqua regia?.
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