What is the order of fluoride, chlorine, bromine, iodide ions and hydroxide in terms of their tendency to be adsorbed by the anode?
Thread Content
What is the order in which fluoride, chloride, bromide, iodide ions and hydroxide ions are adsorbed by the anode? Could some expert please explain this? Thank you. Which condition is more likely to lead to adsorption: a low-voltage electric field of 30 V or less, or a high-voltage electrostatic field of 7.5 KV?
This post was last edited by qugd on 2020-3-4 at 10:52. The order of anion adsorption at the anode is roughly the same as their order of adsorption on the cation resin. However, since electrode adsorption is an adsorption process under an electric field, it is also related to the migration rate of these ions. Furthermore, for strong electric fields, the adsorption effect is estimated to be essentially convergent. However, many ions undergo discharge reactions under the influence of a high electric field; in other words, electrochemical reactions take place, and this is a very important point. In the presence of an electric field, the order of adsorption of anions at the anode is: OH- > F- > Cl- > Br- > I-. In the absence of an electric field, the order of adsorption on anion exchange resin is reversed.