University Chemistry ›› 2019, Vol. 34 ›› Issue (4): 61-65.doi: 10.3866/PKU.DXHX201807031

• Chemistry Laboratory • Previous Articles     Next Articles

Solution to the Problem of Spectrophotometric Determination of the Solubility Product Constant of Lead Iodide

Fuqin HAN*(),Lili WANG,Haiyan SONG,Jingjing CAO,Li GUO   

  • Received:2018-07-13 Accepted:2018-11-01 Published:2019-04-28
  • Contact: Fuqin HAN E-mail:hanfuqin@sina.com
  • Supported by:
    黑龙江省高等教育教学改革项目(2017-38)

Abstract:

Experimental procedure is improved to solve problems of spectrophotometric determination of the solubility product constant of lead iodide. With the improved method, experimental drugs and pollution are reduced, and experimental steps and data analysis are simplified, while keeping the accurate determination. With the derivation, calculation and drawing according to the thermodynamic formula, the linear equation of the relationship between $\ln K_{\text{sp}}^{\ominus } $ and 1/T is given, which can estimate the accuracy of the test results at different temperatures.

Key words: Solubility product constant, Experimental improvement, Spectrophotometry, Linear equation

MSC2000: 

  • G64