Question

How does the fluoride ion-selective electrode detect the fluoride ion? Include the species of fluoride that need tgo be considered, how to free the fluoride ion, and ph considerations. Please mention all species, (molecules and complexes) that Fluoride can be found in, how do you deal with HF?

Answer 1

A fluoride selective electrode is a type of ion selective electrode sensitive to the concentration of the fluoride ion. A common example is the lanthanum fluoride electrode.

•pH meters use a ion selective glass electrode:

–Thin glass membrane connects sample with a reference solution

–Glass membrane typically made of silica

Fluorine forms a great variety of chemical compounds, within which it almost always adopts an oxidation state of −1. With other atoms, fluorine forms either polar covalent bonds or ionic bonds

Hydrogen fluoride,Metal fluorides,Organofluorine compounds