Acid-base titration is the most important of the four titrations. Many of our classmates have poor grades and are often in this chapter. This chapter should master these knowledge points: self-transfer constant of water, acid-base theory of yoke, acid-base balance theory, speciation distribution fraction, proton balance formula, pH calculation of monobasic weak acid and base, pH calculation of amphoteric substance, pH calculation of buffer solution, color change point and range of indicator, titration jump, pH calculation of metering point, etc. On this basis, a reasonable systematization is carried out: this chapter is simply the calculation of pH of different systems and the calculation of different acid-base metering points and titration points. When calculating these two kinds of problems, you can basically use all the knowledge points.
With the most systematic titration, remember two formulas. One is the formula of conditional stability constant k 'my = kmy/(αMαY), which needs to analyze the composition of αMαY; One is the calculation of the metal ion concentration at the metering point [m'] = (cm/2k' my) 0.5, which is also used in the previous formula. Another point is the conditions for accurate titration of metal ions, which can be divided into single ions and mixed ions. Mixed ion titration is the most interesting. To sum up, if the stability constants of two ions meet LG Δ k ≥ 5, the acidity titration is controlled, and if not, the concentration of interfering ions is reduced, which is called masking method.
Redox titration is the most boring. Your teacher may talk in depth, but the exam will be easier. It is nothing more than finding out the content of a certain metal, COD, BOD and so on according to the redox equation, and there is a formula to judge whether a redox reaction is easy to carry out.
Remember the final precipitation titration in Mohr method and Forhad method.