Question

heating solid potassium nitrate produces solid potassium nitrate and oxygen

Answer 1

Heya!

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KNO3 => KNO2 + O2

When we heat solid potassium nitrate, it decomposes and then forms potassium nitrite and oxygen gas.

This reaction was thermal decomposition reaction.

KNO2 is yellow in colour, while KNO3 is greyish.

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Hope it helps...!!!

Answer 2

Hi.

Here is your answer---

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Potassium Nitrate also known as the Nitre.

When the White Potassium Nitrate Crystals are heated, it decomposes and Forms the Potassium nitrite which is Yellow in Colours and the Oxygen gas is liberated.

Reaction to show the Decomposition of Potassium Nitrate ---

         2KNO3       ⇒---------------------⇒     2KNO2          +          O2
Potassium Nitrate                             Potassium Nitrite          Oxygen

Sodium Nitrate(Chili Saltpeter) also Decomposes in a similar manner.

Note ⇒ All Nitrate do not Decomposes in a Similar Manner.

For Example---
When the Zinc nitrate, Copper nitrate, Calcium nitrate, or Lead nitrate decomposes, they Produces there respective oxides, nitrogen dioxide and oxygen is evolved.

     2 Zn(NO3)2     ⇒-------------------------⇒    2 ZnO + 4 NO2 + O2
   

These reaction are the Examples of the Thermal Decomposition which occurs at a High Temperature.


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Hope it helps.

Have a nice day.