Chemistry
Aqua regia is a mixture of :
- Dilute hydrochloric acid and concentrated nitric acid
- Concentrated hydrochloric acid and dilute nitric acid
- Concentrated hydrochloric acid [1 part] and concentrated nitric acid [3 parts]
- Concentrated hydrochloric acid [3 parts] and concentrated nitric acid [1 part]
Related Questions
State your observations:
(a) HCl gas is passed through lead nitrate solution and the mixture is heated.
(b) Hydrochloric acid is added to silver nitrate solution.
(c) Ammonium hydroxide solution is added to the resultant product of part (b).
Distinguish by using HCl.
(a) Lead nitrate solution and silver nitrate solution.
(b) Potassium sulphite and potassium sulphide.
The following questions pertain to the laboratory preparation of hydrogen chloride gas:
(i) Write the equation for it's preparation mentioning the condition required.
(ii) Name the drying agent used in the above preparation and give a reason for the choice.
(iii) State a safety precaution taken during the preparation of hydrochloric acid.
Identify the gas evolved and give the chemical test when dilute hydrochloric acid reacts with :
(i) Sodium sulphite.
(ii) Iron [II] sulphide.