[slmmls]

The question is:

Determine the pH and concentrations of H+ K+ OH- H2PO4-, HPO4 2-, PO4 3-, from a 1.00 L solution containing 0.0250mol KH2PO4 and 0.030mol KOH.

I really do not think there is enough information here to solve. I have scoured the internet for a Ksp or Ka for KH2PO4 and cannot find anything. I have correctly found the concentration of K+ to be .055M, but cant figure out anything else.

Anyone willing to help me would be fantastic!

Thanks!

Would be very helpful if someone could help by Sunday Dec. 9. Thanks!

[Borek]

KH₂PO₄ is soluble well enough, you may safely ignore K_so.

No such thing as K_a of KH₂PO₄ - but you can find dissociation constant values for phosphoric acid.

http://www.chembuddy.com/?left=pH-calculation&right=polyprotic-dissociation-constants

http://www.chembuddy.com/?left=BATE&right=dissociation_constants