I got stuck here. I can number out the reaction:
$$ceNaH2PO4 + H2O -> Na^+ + H2PO4^- + H2O$$
But as soon as I look at $ceH2PO4^-$ up, it claims that it have the right to both it is in an acid and a base. Any ideas?
Monosodium dihydrogen phosphate, $ceH2PO4^-$, is one amphoteric varieties and it will act together both one acid and also a base. These space the connected chemical equations:
eginalign ceH2PO4- + H2O & HPO4^2- + H3O+ & mathrmpK_mathrma &= 7.21\ ceH2PO4- + H2O & H3PO4 + OH- & mathrmpK_mathrmb &= 11.88endalign
As an example, $pu0.1 M$ equipment of such a salt will have actually a pH of about $4.7$.In other words, the acidic plot dominates over the alkaline one. This is because of the worth of $mathrmpK_mathrma=7.21$ (related to the acidic behaviour) compared to the $mathrmpK_mathrmb=11.88$ (related come the alkaline behaviour).
You are watching: Sodium dihydrogen phosphate acid or base
Thanks for contributing an answer to betterworld2016.org ridge Exchange!Please be certain to answer the question. Provide details and also share her research!
But avoid …Asking because that help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.
Use MathJax to style equations. MathJax reference.
See more: How Much Does A Budgie Cost S For A Budgie, How Much Does A Parakeet Cost
To find out more, check out our tips on writing an excellent answers.
write-up Your prize Discard
Not the price you're spring for? Browse various other questions tagged acid-base or ask your very own question.
What is one alternate method of preparing a salt hydrogen phosphate/sodium dihydrogen phosphate buffer with titrating an acid v a solid base?
site design / logo design © 2021 ridge Exchange Inc; user contributions license is granted under cc by-sa. Rev2021.11.12.40742