Kemizten

Hi So I have a question regarding Ag/AgCl as a reference electrode. Why do we use KCl solution in this type of electrode? Because I have read that for reactions that do NOT involve Ag+ or other species that react with Cl-, the salt bridge usually contains KCl electrolyte.

So you mean that the silver as a solid electrolyte allow the movement of ions without the need for a liquid or soft membrane separating the electrode. The ions simply "jumps" around or through the solid. But then again, how can the ions do that? There must be some space for the ions to "land" on, like the interstitial sites I mentioned earlier. Is that right?

So I have another question. Silver iodide, AgI can work as a solid electrolyte. How can electricity pass through the silver iodide? Im thinking that this must have something to do with interstitial sites. We know that iodide ions is much bigger than the silver ions. That means that the silverions can be found in these interstitial sites between the iodide ions. Does that mean that the ions can move around more and "carry" the electricity around?

Hi I have a question about the thiocyanate ion, SCN-. How does it bond to Ca2+ and how does it bond to Hg2+. My guess was that SCN- is a soft base. Hg2+ is a soft acid, so those two go well together. But Ca2+ is a hard acid, so it doesnt go well with SCN-. Is this right?