Abstract With the construction of the subject big ideas as the core, this paper analyzes the current teaching situation of “acid, alkali and salt”, integrates the knowledge contents of unit 10 “acid and alkali” and unit 11 “salt and chemical fertilizer” of ninth grade chemistry of people’s education edition as one unit, and establishes the concept of this discipline that “understanding the nature and reaction law of substances based on substance categories”. The teaching design of this unit is based on the theme activity of exploring the mystery of the principle of acid, alkali and salt in medical applications. It uses the idea of conservation of elements and microscopic analysis activities to develop students’ chemistry thinking, establish students’ scientific attitude and sense of social responsibility, and fully demonstrates the education value of chemistry.
ZHONG Zi-Ting, QIAN Yang-Yi. Unit Teaching of Junior High School Chemistry “Acid, Alkali and Salt” Based on Subject Big Ideas[J]. Chinese Journal of Chemical Education, 2023, 44(15): 79-87.
