November 30, 2020, 03:44:30 AM
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Topic: Conversion PO4-P  (Read 269 times)

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Offline faberaussie

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Conversion PO4-P
« on: November 05, 2020, 05:45:58 AM »
Hi all, I don't know if this is the right place where to post this question.
In my dataset, I have data relative to PO4-P in grams and I would like to convert them in moles.
My doubt: do I have to use the molecular weight of PO4 (about 95 g/mol) or the mass weight of P (about 31 g/mol) to do the conversion? thank you

Offline chenbeier

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Re: Conversion PO4-P
« Reply #1 on: November 05, 2020, 06:27:42 AM »
What do you have given, gram of phosphate or gram of phosphorous.
The molar masses correspont to them.

Offline faberaussie

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Re: Conversion PO4-P
« Reply #2 on: November 05, 2020, 06:39:14 AM »
I have grams of PO4-P. So should I consider it as grams of phosphorus? Thank you

Offline chenbeier

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Re: Conversion PO4-P
« Reply #3 on: November 05, 2020, 04:55:45 PM »
I don't understand you.

For example do you have given 100g PO4 or do you have given 100g P.


Offline faberaussie

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Re: Conversion PO4-P
« Reply #4 on: November 06, 2020, 03:31:22 AM »
Sorry if I was not clear.
In my dataset grams of PO4-P are reported, but I don't know if they were measured as P or as PO4.
PO4-P should be 'orthophosphate as phosphorus' as described here: https://www.hach.com/asset-get.download.jsa?id=50989301315.
So I suppose they correspond to grams of P in PO4. Right?
If this is the case, how can I convert grams of PO4-P in moles?
Thank you
 

Offline AWK

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Re: Conversion PO4-P
« Reply #5 on: November 06, 2020, 03:48:43 AM »
Sorry if I was not clear.
PO4-P should be 'orthophosphate as phosphorus' as described here: https://www.hach.com/asset-get.download.jsa?id=50989301315.
So I suppose they correspond to grams of P in PO4. Right?
Thank you
Your link answers this question unambiguously. Would you like someone to read this long work for you?

Converting mass to moles is the complete start of general chemistry.
AWK

Offline Borek

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Re: Conversion PO4-P
« Reply #6 on: November 06, 2020, 03:49:21 AM »
_IF_ it is phosphate as phosphorus, then you have mass of P and molar mass of P, plug and chug.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

Offline faberaussie

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Re: Conversion PO4-P
« Reply #7 on: November 06, 2020, 03:53:02 AM »
Ok thank you

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