Name: Understanding the Structure of Water
Uploaded: 2019-07-19
Duration: 2 min 13 s
Description: A water molecule contains two hydrogen atoms, each sharing a pair of electrons with an oxygen atom. The molecular shape is bent with an H-O-H angle of 104.5°...

Question

How can

D_{2} O

be prepared from water? Mention the physical properties in which

D_{2} O

differs from

H_{2} O

. Give at least three reactions of

D_{2} O

showing the exchange of hydrogen with deuterium.

Accepted Answer

$D_{2} O$ can be prepared by exhaustive or prolonged electrolysis of water or as a by-product in some fertilizer industries. Due to high molecular mass $D_{2} O$ differ from water.

Physical Properties of $H_{2} O$ and $D_{2} O$

Property $H_{2} O$ $D_{2} O$

Molecular mass $(g {mol}^{- 1})$ $18.0151$ $20.0276$

Melting point/K $273.0$ $276.8$

Boiling point/K $373.0$ $374.4$

Enthalpy of formation/ $kJ {mol}^{- 1}$ $- 285.9$ $- 294.6$

Enthalpy of Vaporisation $(373 K) / kJ {mol}^{- 1}$ $40.66$ $41.61$

Enthalpy of fusion/ $kJ {mol}^{- 1}$ $6.01$ -

Temp of max. density/K $276.98$ $284.2$

Density $(298 K) / g {cm}^{- 3}$ $1.0000$ $1.1059$

Viscosity/centipoise $0.8903$ $1.107$

Dielectric constant/ $C^{2} / N \cdot m^{2}$ $78.39$ $78.06$

Electrical conductivity $(293 K / {ohm}^{- 1} {cm}^{- 1})$ $5.7 \times 10^{- 8}$ -

The chemical reactions showing the exchange are as follows:

$NaOH + D_{2} O \to NaOD + HOD HCI + D_{2} O \to DCl + HOD {NH}_{4} Cl + D_{2} O \to {NH}_{3} DCI + HOD$

How can $D_{2} O$ be prepared from water? Mention the physical properties in which $D_{2} O$ differs from $H_{2} O$ . Give at least three reactions of $D_{2} O$ showing the exchange of hydrogen with deuterium.

Important Questions on Hydrogen

Learn and Prepare for any exam you want !

How can D2O be prepared from water? Mention the physical properties in which D2O differs from H2O. Give at least three reactions of D2O showing the exchange of hydrogen with deuterium.

Important Questions on Hydrogen

Learn and Prepare for any exam you want !

How can $D_{2} O$ be prepared from water? Mention the physical properties in which $D_{2} O$ differs from $H_{2} O$ . Give at least three reactions of $D_{2} O$ showing the exchange of hydrogen with deuterium.