Application of Modern Analytical Technology in Junior High School Chemistry Teaching: Reconsideration of Hard Water and Soft Water
ZHANG Hao1,2, FU Geng-Tao1**, CHEN Kai3**, TANG Ya-Wen1
1. School of Education Science, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China; 2. Nanjing No.13 Middle School Suojin Branch, Nanjing 210042, China; 3.School of Environmental Science, Nanjing Xiaozhuang University, Nanjing 211171, China
