论文部分内容阅读
少数学生常把金属钠和硫酸铜溶液反应的化学方程式错写成: 2Na+CuSO_4=Na_2SO_4+CU一些教师按照教学参考资料、复习资料纠正学生这个错误时,往往用另外两个化学方程式来表示: 2Na+2H_2O=2NaOH+H_2↑
A small number of students often misinterpret the chemical equations for the reaction of metallic sodium and copper sulfate solutions as: 2Na+CuSO_4=Na_2SO_4+CU Some teachers use the teaching reference materials and review materials to correct students’ mistakes. They are often expressed in two other chemical equations: 2Na +2H_2O=2NaOH+H_2↑