Innovative Design for"Preparation and Properties for Buffering Solution"
Buffer solution is a kind of solution which can stabilize the pH value of the system and has been widely used in life.The experimental courses of Inorganic Chemistry or Inorganic and Analytical Chemistry have been set up the corresponding experimental content.But it was only set under a single concentration,using pH paper to test the change of pH in the traditional experiment content.According to the teaching practice,it was found that the traditional experiment content has many disadvantages,such as not intuitive,single condition.This cannt achieve the teaching purpose of this experiment.Therefore,we redesigned the content of this part,using the color change of indicators instead of pH paper to test the change of pH,adding experimental contents such as different concentrations,different rations of buffer solution,and using precise pH metors to investigate the influence factors of the buffer capacity.Based on the innovative design,students can understand the buffering effects by intuitively observing the change of the color of the solution,and also can systematically understand the impact of different conditions on buffer capacity.This can reach the aim of experiment and cultivate the students independent thinking and summarizing ability.
buffer solutionbuffer capacitybuffer effectinnovation designpH value
万方数据
