Deep Understanding of Chemical Equilibrium Constants and Their Applications
SUN Lei1,2**, SUN Guo-Hui1, ZHENG Chang-Long2
1. High School Attached to Northeast University, Changchun 130021,China;
2. Institute of Chemical Education, Northeast University, Changchun 130024,China
Abstract Based on the existing teaching of chemical equilibrium constant, this paper puts forward a new perspective of understanding chemical equilibrium constant:various expressions of chemical equilibrium constant. According to the chemical equilibrium constant expressed by concentration in the textbook and combined with the ideal gas equation of state, the expression of chemical equilibrium constant expressed by mass fraction and partial pressure is deduced, the differences and relations between the three are analyzed, and then the various expressions of chemical equilibrium constant are applied to solve the relevant problems in the 28 th question of National Chemistry (Volume I) in 2019, make students deeply understand the key to solving this college entrance examination question. At the same time, it expands students' understanding of equilibrium constant and improves students' ability to flexibly apply equilibrium constant to solve problems.
SUN Lei, SUN Guo-Hui, ZHENG Chang-Long. Deep Understanding of Chemical Equilibrium Constants and Their Applications[J]. Chinese Journal of Chemical Education, 2022, 43(7): 96-99.