Improved Method of Indicating the End of Sodium Nitrite Titration Method
QU Jin-Hua1, YANG Xu2
1. Vocational and Technical College, Dalian University, Dalian, Liaoning 116001, China;
2. College of Mechanical Engineering, Dalian University of Technology, Dalian, Liaoning 116001, China
Abstract Currently，indicating the end of sodium nitrite method mostly use dead stop titration and external indicator method, the two methods have some defects in the actual operation process. During teaching practice, the end indication method is improved by combining internal indicator with external indicator. Improved method can make the relative average deviation smaller，and experiment operation more simple and faster, so the experiment becomes more economic and practical.
QU Jin-Hua, YANG Xu. Improved Method of Indicating the End of Sodium Nitrite Titration Method[J]. Chinese Journal of Chemical Education, 2014, 35(2): 25-26.
