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Topic: HF + HNO3 in mannitol  (Read 1344 times)

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Offline WowSoDoge

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HF + HNO3 in mannitol
« on: January 26, 2020, 10:26:02 AM »
Hello,
I have a question about fixing the equation of a reaction i made in class :

I made a chemical dosage of a mixed solution of HF + HNO3 by NaOH in Mannitol, but i don't know if my equation is right i found this :


HNO3 + NaOH = NaNO3 + H2O
HF + NaOH = NaF + H2O

So it gives me :

HNO3+HF+2NaOH = NaNO3 + NaF + 2H2O

How can i find the concentration of HNO3 and HF please ? Is my equation right ?

Thanks you in advance
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Offline chenbeier

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Re: HF + HNO3 in mannitol
« Reply #1 on: January 26, 2020, 10:36:12 AM »
Only with titration with NaOH no way. You need an additional method to determine fluoride.
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Offline WowSoDoge

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Re: HF + HNO3 in mannitol
« Reply #2 on: January 26, 2020, 10:45:17 AM »
I made the titration with NaOH + EtOH as a ph-metric , it is possible to determinate it ?
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Offline chenbeier

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Re: HF + HNO3 in mannitol
« Reply #3 on: January 26, 2020, 02:42:18 PM »
No you have a mixture of two acids. How you want to determine HNO3 and HF.
You can titrate the mixture and with a second method for fluoride you can do substraction to get nitric.
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Offline Enthalpy

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Re: HF + HNO3 in mannitol
« Reply #4 on: January 28, 2020, 09:21:18 AM »
Besides the question about dosage, how potentially dangerous is it to mix mannitol and nitric acid plus an other acid?
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