Question

How to obtain white precipitate from HCl gas?

Answer 1

Hint: Hydrochloric acid, also known as muriatic acid, is a hydrogen chloride aqueous solution. It's a colourless liquid with a heavy, pungent odour. It's considered a heavy acid. In the digestive processes of most animal species, including humans, it is a part of gastric acid.

Complete answer:
Hydrochloric acid, also known as muriatic acid, is a hydrogen chloride aqueous solution. It's a colourless liquid with a heavy, pungent odour. It's considered a heavy acid. In the digestive processes of most animal species, including humans, it is a part of gastric acid.
$AgNO_3$ is the molecular formula for silver nitrate, an inorganic compound. This salt can be used to make a variety of silver compounds, including those used in photography. It is also less light sensitive than halides.
While dilute HCl does not react with nitrates, it can react with silver nitrate to produce a white silver chloride precipitate.
\[HCl + AgN{O_3} \to AgCl + HN{O_3}\]
This is an acid-base (neutralisation) reaction: HCl is an acid, while AgNO₃ is a base. AgCl is the formed precipitate in this precipitation reaction.
As hydrogen chloride (HCl) comes into contact with ambient humidity, it produces white fumes of hydrochloric acid.
Since the chlorine atom is much more electronegative than the hydrogen atom, the hydrogen and chlorine atoms are bound by a covalent single bond that is strongly polar.
The eyes, ears, and respiratory tract can all be irritated by hydrogen chloride gas.
Silver chloride, also known as AgCl, is a chemical compound with the formula AgCl. The poor solubility of this white crystalline solid in water is well known. Silver chloride turns to silver when exposed to light or heated, resulting in a grey to black or purplish coloration in certain samples.

Note:
Silver chloride, also known as AgCl, is a chemical compound with the formula AgCl. The poor solubility of this white crystalline solid in water is well known. Silver chloride turns to silver when exposed to light or heated, resulting in a grey to black or purplish coloration in certain samples.