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Topic: standardize for NaOH  (Read 3001 times)

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Offline cloveryeah

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standardize for NaOH
« on: March 08, 2015, 01:30:56 AM »
why use KHP for standardization of NaOH but not use H3PO4
they are both stable and not absorb moisture in air

so y not use h3po4 instead?
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Offline Borek

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Re: standardize for NaOH
« Reply #1 on: March 08, 2015, 04:51:26 AM »
What are the required properties of the standard substance?
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Offline cloveryeah

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Re: standardize for NaOH
« Reply #2 on: March 08, 2015, 06:30:11 AM »
air-stable
not absorb moisture
so...?
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Offline Borek

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Re: standardize for NaOH
« Reply #3 on: March 08, 2015, 12:38:02 PM »
That's not all.

http://www.titrations.info/titration-standard-substances

What is easier to weigh - a solid, or a liquid?

Besides, I am not convinced concentrated phosphoric acid is not hygroscopic.
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