Give a balanced chemical reaction for the preparation of PH3 in the laboratory what… – Chemistry NEB 2074 (old course) (grade increment) Solution

Ca₃P₂+6H₂Oheat2PH₃+3Ca(OH)₂

Balanced reaction for PH₃ preparation (laboratory method)

Preparation of $PH X_{3}$ : Phosphine ( $PH X_{3}$ ) is prepared in the laboratory by the hydrolysis of calcium phosphide ( $Ca X_{3} P X_{2}$ ) with water. The balanced chemical equation is:

$Ca X_{3} P X_{2} + 6 H X_{2} O 2 PH X_{3} + 3 Ca (OH) X_{2}$

Reaction with $O X_{2}$ : When $PH X_{3}$ is treated with oxygen ( $O X_{2}$ ), it undergoes combustion to form phosphorus pentoxide ( $P X_{4} O X_{10}$ ) and water ( $H X_{2} O$ ). The balanced equation is:

$PH X_{3} + 2 O X_{2} H X_{3} PO X_{4}$

However, in the presence of excess oxygen, it further oxidizes to form phosphoric acid ( $H X_{3} PO X_{4}$ ):

$PH X_{3} + 4 O X_{2} H X_{3} PO X_{4}$

Give a balanced chemical reaction for the preparation of PH3 in the laboratory what happens when it is treated with O2

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