Question

What is aqua regia, how to make it​

Answer 1

Answer:

Aqua regia is a quiz making company which is held all over India.

Explanation:

There is a quiz round in the starting in your school. If you win it then you will get to participate in the next round which will be held elsewhere. It would be better if you are in STD 10. There will be a mix of many children all over Mumbai ( Class group - 9/10 ).

It is not easy to win this stage. If you win then ou get to travel to Bengalaru and give the all India quiz over there.

I have gone to Bengalaru but couldn't win it.......

Hope helps

Answer 2

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.​​

Fast Facts: Aqua Regia

1.Aqua regia is a corrosive acid mixture made by combining nitric acid and hydrochloric acid.

2.The usual ratio of acids is 3 parts hydrochloric acid to 1 part nitric acid.

3.When mixing the acids, it is important to add the nitric acid to the hydrochloric acid and not the other way around.

4.Aqua regia is used to dissolve gold, platinum, and palladium.

5.The acid mixture is unstable, so it is usually prepared in small amounts and used immediately.

@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.

Hope it is Helpful ✔️