A canister containing air has a volume of 8.5 L and a pressure of 1.45 atm when the temperature is 310 K. What is the pressure when the volume is increased to 18.0 L and
the temperature is reduced to 280 K?

The correct option is: AgNO₃(aq) + KCl(aq) = AgCl(s) + KNO₃(aq)  

Explanation:

Precipitation reaction is a chemical reaction that involves reaction between two soluble salts to give an insoluble salt. This insoluble salt exists as a solid and settles down.

Therefore, the solid formed in a precipitation reaction is known as the precipitate.  

As the solid silver nitrate (AgNO₃) and solid potassium chloride (KCl) are soluble in water, therefore, their aqueous solutions are represented as AgNO₃(aq) and KCl(aq), respectively.

The precipitation reaction of AgNO₃(aq) and KCl(aq) gives an insoluble salt, silver chloride (AgCl) and a soluble salt, potassium nitrate (KNO₃).

The insoluble salt, AgCl is called the precipitate and is represented as AgCl(s). Whereas, the soluble salt, KNO₃ is represented as KNO₃ (aq).

Therefore, the chemical equation for this precipitation reaction is:

AgNO₃(aq) + KCl(aq) → AgCl(s) + KNO₃(aq)