Write down a balanced equation for the hydrolysis of $P C l_{5}$ with heavy water.

Question

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Answer 1

It reacts with heavy water to form phosphorus oxychloride $(P O C l_{3})$ and deuterium chloride $(D C l) . P O C l_{3}$ reacts further with heavy water to form $(D C l) . P O C l_{3}$
.
$P C l_{5} + D_{2} O \to P O C l_{3} + 2 D C l$
$\underline{P O C l_{3} + 3 D_{2} O \to D_{3} P O_{4} + 3 D C l}$
$P C l_{5} + 4 D_{2} O \to D_{3} P O_{4} + D e u t e r i u m c h l o r i d e 5 D Cl$

Answer 2

It reacts with heavy water to form phosphorus oxychloride

(P O C l_{3})

and deuterium chloride

(D C l) . P O C l_{3}

reacts further with heavy water to form

(D C l) . P O C l_{3}

.

P C l_{5} + D_{2} O \to P O C l_{3} + 2 D C l

\underline{P O C l_{3} + 3 D_{2} O \to D_{3} P O_{4} + 3 D C l}

P C l_{5} + 4 D_{2} O \to D_{3} P O_{4} + D e u t e r i u m c h l o r i d e 5 D Cl