Traditional classroom teaching tends to impart theoretical knowledge unilaterally,which is not conducive to the all-round development of students.As a modern teaching auxiliary tool,hand-held technology has many advantages,such as providing sensitive experimental instruments,presenting obvious experimental phenomena and collecting accurate experimental data.It can explain the incomprehensible micro essence in chemical reaction in the form of data or curves and help students construct the chemical quadruple representational thinking.Taking the Determination of Acetic Acid Ionization Constant as an example,this paper combined hand-held technology experiment to carry out classroom teaching research based on chemical quadruple characterization,and strive to develop students'chemical core literacy.
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