Chemical Forums
Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: VoltarGomes on October 28, 2019, 04:12:33 AM
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Here is the question:
Phosphorus, P4(s), reacts with hot water to form phosphine, PH3(g), and phosphoric acid, H3PO4(aq). Write a balanced chemical reaction for this equation.
I’m trying to balance this using half reactions (adding H20 and H+) but am getting myself confused. Is this a disproportionation reaction where Phosphorus is both oxidized and reduced? Or is the H20 the second half reaction with the H3PO4?
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Yes, it can be balanced as disproportionation.
Not that it is really necessary, P4 + H2O :rarrow: PH3 + H3PO4 balances quite nicely (hint: start with oxygen, it is present in two molecules only).
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(adding H20 and H+)
Your method works - just do it carefully - or show you result to get more help.