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- Why is phosphorous pentoxide a dehydrating agent?
$$\ce{hno3 + p2o5 -> 2hpo3 + n2o5}$$ In this reaction, both nitrogen and phosphorus have the same oxidation number before and after the product is formed Since the $+5$ oxidation of nitrogen is unstable, it has to undergo reduction, but here it remains the same after the product is formed
- Why is phosphorus (v) oxides molecular formula P4O10 and not P2O5
This is a relationship many people often forget about So it's quite nice to remind them of the original $\ce{P4}$-tetrahedron by not shortening the formula down to $\ce{P2O5}$ And as many suggested above it's just the unit you will see
- Why does monoammonium phosphate (MAP) have 52% of phosphorus (P₂O₅)?
To have a standard way of reporting the fertilizer analysis, phosphorus is reported as being $\ce{P2O5}$ rather than whatever form it actually is $\endgroup$ – MaxW Commented Mar 19, 2019 at 18:07
- How to convert P2O5 concentration to H3PO4 concentration?
$\ce{P2O5}$ content is useful as it is the phosphorous content that a scientist often cares about when using phosphoric acids This might seem silly given that as you pointed out anything from $0-70\% \ \ce{P2O5}$ could just be expressed as a percentage of $\ce{H3PO4}$ but there are times when a higher $\ce{P2O5}$ concentration
- Mechanism of carboxylic acid and amide dehydration with phosphorus . . .
Phosphorus(V) oxide is not really P4O10, either, at least not in its most stable state It's a polymer So showing it as P2O5 isn't 100% accurate but doesn't matter for the mechanism Wikipedia has more about the various polymorphs of the compound $\endgroup$ –
- Is the proper formula for phosphorus oxide(V) P4O10 or P2O5?
P2O5 is the empirical formula and P4O10 is the molecular formula $\endgroup$ – Xiaolei Zhu Commented
- organic chemistry - Differences between KOH and phosphorus pentoxide as . . .
$\ce{P2O5}$ is much more effective, $\ce{KOH}$ is cheaper and easier to handle $\ce{P2O5}$ is also acidic and $\ce{KOH}$ is basic There are substances that die in acidic environment (acetales) and those that die in basic environment (halogen-anhydrides)
- Beckmann rearrangement v s dehydration of Oximes
In the above question, A is an oxime, which is then reacted with phosphorus pentoxide Now, phosphorus pentoxide is both a dehydrating reagent and a reagent used for Beckmenn rearrangement, but which
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