Chemistry 2009 JAMB Past Questions - Question 40: One of the products of the thermal decomposition of sodium trioxonitrate (V) is

Correct Answer

C

Explanation

You are right. One of the products of the thermal decomposition of sodium trioxonitrate (V), also known as sodium nitrate (NaNO3), is **sodium nitrite (NaNO2)**. The balanced chemical equation for this reaction is:

2NaNO3 (s) → 2NaNO2 (s) + O2 (g)

This reaction occurs at high temperatures, typically above 300 °C. Sodium nitrite is a yellowish-white salt that is soluble in water. It is used in a variety of applications, including as a food additive, a corrosion inhibitor, and a diazonium salt precursor in organic synthesis.
Other products of the thermal decomposition of sodium trioxonitrate (V) can include:

* **Sodium oxide (Na2O)**: If sodium nitrite is further heated, it can decompose to form sodium oxide and nitrogen gas.
* **Nitrogen oxides (NO, NO2, N2O)**: These gases can be formed if the decomposition reaction is not controlled carefully.

It is important to note that the thermal decomposition of sodium trioxonitrate (V) is an exothermic reaction, meaning that it releases heat. This reaction can be dangerous if not carried out in a controlled environment with proper safety precautions.