Advertisements
Advertisements
Question
Give reason for the following:
Aqua regia dissolves gold and platinum.
Advertisements
Solution
\[\ce{3HCl + HNO3 -> 2H2O + NOCl + 2[Cl]}\]
Gold in Aqua regia :
\[\ce{Au + 4[Cl] -> AuCl3}\]
Platinum in Aqua regia :
\[\ce{Pt + 4[Cl] -> PtCl4 }\]
APPEARS IN
RELATED QUESTIONS
Write balanced chemical equations for Action of hot and concentrated Nitric acid on copper
Explain the following:
Dilute nitric acid is generally considered a typical acid but not so in its reaction with metals.
Write a balanced equation for the action of heat on a mixture of copper and concentrated nitric acid.
Give two chemical equations for the following:
Nitric acid acting as the oxidizing agent.
Name a solution which absorbs nitric oxide.
Name the following :
Gas produced in air during lighting.
Give reason for the following:
Conc. Nitric acid renders iron passive.
Give reason for the following:
Nitric acid is used in purification of gold.
Write balanced equation and name the product formed when :
Cupric oxide reacts with nitric acid.
What do you see when concentrated nitric acid is added to copper?
