Question

Исходя из изученных химических свойств азота,укажите два возможных способа связывания атмосферного азота на химических заводах.Напишите уравнения реакций получения кальциевой селитры с использованием этих способов.

Answer 1

Связывание атмосферного азота:

 

1) N2 + 3H2 --> 2NH3

 

2) N2 + O2 --> 2NO

 

Получение нитрата кальция из полученных продуктов:

 

4NH3 + 5O2  --> 4NO + 6H2O

 

2NO + O2 --> 2NO2

 

2Ca(OH)2 + 4NO2 + O2 --> 2Ca(NO3)2 + 2H2O

Answer 2

Two Possible Methods of Fixing Atmospheric Nitrogen in Chemical Plants

There are two common methods used in chemical plants to fix atmospheric nitrogen: the Haber process and the Ostwald process.

1. Haber Process: The Haber process is a method used to synthesize ammonia (NH3) from atmospheric nitrogen (N2) and hydrogen (H2). The reaction takes place under high pressure and temperature in the presence of an iron catalyst.

The balanced chemical equation for the Haber process is as follows: N2 + 3H2 ⇌ 2NH3

2. Ostwald Process: The Ostwald process is a method used to produce nitric acid (HNO3) from ammonia (NH3). The process involves the oxidation of ammonia to nitric oxide (NO) and then further oxidation of NO to nitrogen dioxide (NO2), which is then dissolved in water to form nitric acid.

The balanced chemical equations for the Ostwald process are as follows: 4NH3 + 5O2 → 4NO + 6H2O 2NO + O2 → 2NO2 3NO2 + H2O → 2HNO3 + NO

Calcium Nitrate Production Reactions Using the Above Methods

1. Calcium Nitrate Production Using the Haber Process: Calcium nitrate (Ca(NO3)2) can be produced using the Haber process by reacting ammonia (NH3) with calcium hydroxide (Ca(OH)2).

The balanced chemical equation for the reaction is as follows: 2NH3 + Ca(OH)2 → Ca(NO3)2 + 2H2O

2. Calcium Nitrate Production Using the Ostwald Process: Calcium nitrate can also be produced using the Ostwald process by reacting nitric acid (HNO3) with calcium carbonate (CaCO3).

The balanced chemical equation for the reaction is as follows: 2HNO3 + CaCO3 → Ca(NO3)2 + CO2 + H2O

Please note that the above reactions are simplified representations of the processes and may involve additional steps or conditions in industrial production.