摘要
根据恒流电解原理和阴离子交换膜能防止阳离子透过的特性 ,建立了用电解法溶解锡样品的方法。通过选择合适的电解质和电解电流使电流效率为 1 0 0 % ,利用 Faraday定律 m=k It计算样品的溶解量。经计算 ,锡的电化摩尔质量 k=2 .2 1 4± 0 .0 0 1 g/( A· h)。当 0 .1和 0 .5 mol/LH2 SO4分别作阳极室和阴极室电解质、通 1 5 0 m A电流电解 0 .5 h时 ,称量阳极法得到样品的溶解量是 0 .1 663g,与理论计算值 0 .1 661
Based on the constant current electrolytic dissolution principle and the characteristics of an anion exchange membrane which hinders cation passage, a procedure for dissolving tin is described. There is only need of dissolving partial sample. Using the Faraday's law m=kIt calculated directly the amount from the sample by use of selecting suitable electrolytic current to make the current efficiency be equal to 100%. The electrochemical mole mass of tin is 2.214±0.001 g/(A·h) upon calculation. When 0.1 and 0.5 mol/L sulfuric acids were respectively used as the anode and cathode electrolytes, electrolytic current was 150 mA and electrolysis time was 0.5 h, the mass obtained from weighing anode method was 0.1663 g, and was in agreement with 0.1661 g, given by Faraday's law.
出处
《化学世界》
CAS
CSCD
北大核心
2002年第9期463-465,共3页
Chemical World
