Hydrolysis of Xenon Fluorides and Factors Affects Hydrolysis

Write the hydrolysis products of Xenon Fluorides and discuss the factors which affects the hydrolysis

Write the hydrolysis products of XeF2, XeF4 and XeF6 and discuss the factors which affects the hydrolysis.

Hydrolysis of Xenon Fluorides

The process of hydrolysis of xenon fluoride involves a number of intermediates and can be carried out in a multiple pathways. The initial formation of a xenon-oxygen bond, followed by the subsequent release of hydrogen fluoride is an essential reaction pathway. Hydrolysis of different xenon fluorides are given below-

Hydrolysis of XeO2

2XeF2 (s) + 2H2O(l) → 2Xe (g) + 4 HF(aq) + O2(g)

Hydrolysis of XeO4

6XeF4 + 12 H2O → 4Xe + 2XeO3 + 24 HF + 3O2

Hydrolysis of XeO6

XeF6 + 3 H2O → XeO3 + 6 HF

Partial hydrolysis of XeF6 gives oxyfluorides,
XeF6 + H2O → XeOF4 + 2HF
XeF6 + 2 H2O → XeO2F2 + 4HF

Factors Affecting Hydrolysis

The rate and extent of hydrolysis of xenon fluorides are affected by several factors. Some of them are given below-
Identity of xenon fluoride: Different xenon fluorides exhibit different reactivity towards hydrolysis. Generally, higher the oxidation state of xenon, higher the reactivity.
Concentration of Water: Higher the concentration of water, faster will be the rate of hydrolysis.
Temperature: Higher the temperatures, faster the hydrolysis reaction.
pH: pH of the reaction medium affects the hydrolysis pathway and generate certain xenon-oxygen species.

The end product of the complete hydrolysis of XeF6 is

A. XeOF4
B. XeO2F2
C. XeO3
D. XeO3


Option C is correct answer.
Complete hydrolysis of XeF6 gives one molecule of XeO3 and six molecules of Hydrogen fluoride.
XeF6 + 3 H2O → XeO3 + 6 HF