Adjustment of Equations, Stoichiometric Calculations
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Theme: Chemistry reaction
Competencies
Mathematical competence in science, technology and engineering
Personal, social and learning to learn competence
Entrepreneurial Competence
Subjects and year by Educational System
Spain > Physics and chemistry > 3rd ESO > Change
Spain > Physics and chemistry > 4th ESO > Change
Enunciation
Clara Immerwahr (1870-1915) and her husband Fritz Haber (1864-1934) worked on the synthesis of ammonia for fertilizers and developed an industrial process to produce NH3. To obtain it, they used nitrogen from the air, N2, and hydrogen, H2.
a) Write and balance the reaction.
b) Identify the reactants and products.
c) If 28 g of nitrogen react with 6 g of hydrogen, what amount of ammonia is produced?
d) In an experiment, starting with 28 g of nitrogen and 10 g of hydrogen, what mass of ammonia will be produced?
Observations and context
Her contemporaries were Lise Meitner (1878-1968), a renowned Austrian scientist who contributed to the discoveries of the element protactinium and nuclear fission; Mileva Marić (1875-1948), a mathematician and the first wife of Albert Einstein, who contributed to the work for which he was awarded the Nobel Prize; and Elsa Neumann (1872-1902), a German physicist. She was the first woman to obtain a doctorate from Humboldt University in Berlin in 1899, a pioneer in aviation research, and an advocate for the inclusion of women in the world of science.
Description
This activity aims for students to learn how to represent a chemical reaction through a chemical equation, identifying the reactants and products. Additionally, they should balance the equations and perform stoichiometric calculations. Depending on the students' level, the activity can be carried out using the concept of the mole.
It is interesting to discuss the role of ammonia in the chemical industry and its impact on the economic development of a country.