Reaction between Urea and Nitrous Acid

When urea reacts with nitrous acid, several products are formed. The reaction is as follows:

HNO2 + (NH2)2CO → N2O + CO2 + 2H2O

Products of the Reaction

The products of the reaction between urea and nitrous acid are:

1. Nitrous Oxide (N2O)

Nitrous oxide, also known as laughing gas, is a colorless gas with a slightly sweet odor and taste. It is used as an anesthetic in dentistry and surgery, as well as in the production of whipped cream.

2. Carbon Dioxide (CO2)

Carbon dioxide is a colorless gas with a slightly sour taste and odor. It is a greenhouse gas that contributes to climate change. It is also used in the production of carbonated beverages and dry ice.

3. Water (H2O)

Water is a clear, odorless, and tasteless liquid that is essential for life. It is used in a variety of applications, including drinking, cooking, and cleaning.

Explanation

The reaction between urea and nitrous acid is an example of a decomposition reaction. Nitrous acid decomposes into nitrogen dioxide and water, which then react with urea to produce nitrous oxide, carbon dioxide, and water.

(NH2)2CO + HNO2 → N2O + CO2 + 2H2O

The reaction occurs in acidic conditions, which favors the formation of nitrous acid. Nitrous acid is a weak acid that is easily decomposed into nitric oxide and water. Nitric oxide then reacts with oxygen in the air to form nitrogen dioxide.

2HNO2 → NO + NO2 + H2O

The nitrogen dioxide then reacts with water to form nitrous acid, which can react with urea to produce the final products.

NO2 + H2O → HNO2

Overall, the reaction between urea and nitrous acid produces nitrous oxide, carbon dioxide, and water.