What is the principle of KF titration?
The principle of Karl Fischer titration is based on the oxidation reaction between iodine and sulphur dioxide. Water reacts with iodine and sulphur dioxide to form sulphur trioxide and hydrogen iodide. An endpoint is reached when all the water is consumed.
What is Karl Fischer titration SlideShare?
What is the range of KF factor?
Thus, the optimal pH range for the Karl Fischer reaction is from 5 to 8, and highly acidic or basic samples need to be buffered to bring the overall pH into that range.
What is factor in Karl Fischer?
The water equivalence factor F, in mgs of H2O per ml of reagent, is calculated according to the formula 0.1566 x w/v, where W is the weight in mgs of sodium tartrate and V is the volume in ml of the reagent.
What is titration PPT?
Titration is the slow addition of one solution of a known concentration (called a titrant) to a known volume of another solution of unknown concentration until the reaction reaches neutralization, which is often indicated by a color change. Read more. Hagar Ibrahem. Designer at Faculty Of Applied Arts.
Why use methanol in Karl Fischer titration?
Most liquid samples dissolve in methanol, which is the usual solvent in Karl Fischer determinations. To determine the total amount of water, the sample must dissolve completely. Other solvents can be added to methanol in specific proportions to liberate the water more efficiently.
Why KF reagent is pyridine free?
An essentially pyridine-free Karl Fischer reagent useful in the determination of water, comprises a dissolving agent containing sulfur dioxide and a pyridine substitute in a Karl Fischer solvent, and a titrating agent containing iodine in a Karl Fischer solvent, wherein the pyridine substitute is an alkali or alkaline …
What is titration PDF?
Titration is the quantitative addition of a solution of known concentration to a solution of unknown concentration until the reaction between them is complete to determine the concentration of the second solution. An acid–base titration is the quantitative determination of the concentration of an acid or a base.