分析化学 填空题(外国英语资料).docVIP

分析化学 填空题(国外英语资料) 1. determine the content of a component in a substance, the result is (%): 59.82, 60.06, 59.86, 60.24. The average deviation is the relative average deviation, the standard deviation is the relative standard deviation, and the confidence interval is () 2., the system error relief is the standard method and the method used to compare, correct the instrument and do Test and test methods are reduced, while accidental error is adopted Ways to reduce. 3. there is a mixed solution of phosphate, this standard hydrochloric acid titration to phenolphthalein end point when the volume of acid consumption to V1; continue with methyl orange as indicator and consumption to the volume of acid is V2. When V1=V2, consists of; when V1V2, consists of... (V10, V20) 4.NH4CN proton conditions are 5. in the mixed solution containing Ca2+ and Ag2+, the Ca2+ is titrated with EDTA standard solution under pH=12 conditions. The effect of adding triethanolamine is that the effect of adding NaOH is . 6. a colored solution, when the thickness of the liquid layer is 1cm, the light intensity is 80% of the incident light intensity. If the liquid layer passes through the 5cm, the light intensity will be reduced by%. 7. the titration curve of the weak acid in the strong base titration, the magnitude and sum of the titration sudden jump Of 8. when the current is equal to half of the current of diffusion, the potential of the dropping mercury electrode is called. The characteristic values of different ions in different media are the basis of polarographic analysis. The resistance of the 9. component molecules to mass exchange from the gas phase to the gas-liquid interface is called . The outer electrons 10. molecules of chemical energy in the excited state in the non radiative relaxation to the lowest vibrational levels of the first excited electronic states, the vibration level and then jumps back to the ground state, and radiation. This phenomenon of luminescence is called. 1. determi