Ka and pH

Moderators: Chem_Mod, Chem_Admin

Dina Geotas 4A
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

Ka and pH

Postby Dina Geotas 4A » Wed Jan 23, 2019 4:14 pm

Is there a formula that directly relations pH and Ka? or pOH and Kb?

Sarah Fatkin 4I
Posts: 71
Joined: Fri Sep 28, 2018 12:27 am

Re: Ka and pH

Postby Sarah Fatkin 4I » Wed Jan 23, 2019 4:24 pm

Hi! I don't think so, but it is helpful to remember that when pH is lower, Ka is smaller and when pOH is lower, Kb is smaller.

Nada AbouHaiba 1I
Posts: 77
Joined: Fri Sep 28, 2018 12:28 am
Been upvoted: 1 time

Re: Ka and pH

Postby Nada AbouHaiba 1I » Wed Jan 23, 2019 4:38 pm

I don't believe there's any equation that will relate the two. You would just have to use an ICE box, solve for the concentration of H3O/OH and then calculate pH/pOH

Katie Sy 1L
Posts: 57
Joined: Fri Sep 28, 2018 12:18 am

Re: Ka and pH

Postby Katie Sy 1L » Wed Jan 23, 2019 4:41 pm

i don't think there is one but just make sure to know the relationship between pka with ka and pkb with kb and you can use an ICE box to find the concentration to find the ka or kb values

Laura Gong 3H
Posts: 89
Joined: Fri Sep 28, 2018 12:26 am
Been upvoted: 1 time

Re: Ka and pH

Postby Laura Gong 3H » Wed Jan 23, 2019 5:43 pm

Knowing the Ka or Kb can help you solve for H+ or OH- concentrations (using ICE tables) that can then help you solve for pH or pOH.

Nico Edgar 4L
Posts: 32
Joined: Fri Sep 28, 2018 12:19 am

Re: Ka and pH

Postby Nico Edgar 4L » Thu Jan 24, 2019 5:01 pm

No there is not. Ka/B just let you find the concentration of H+/OH- which in turn lets you find the pH.

Niveda_B_3I
Posts: 60
Joined: Fri Sep 28, 2018 12:24 am

Re: Ka and pH

Postby Niveda_B_3I » Thu Jan 24, 2019 11:14 pm

Not really. You'd have to use the Ka or Kb value to solve an ICE table and find the concentration of Hydronium ions to find that.


Return to “Non-Equilibrium Conditions & The Reaction Quotient”

Who is online

Users browsing this forum: No registered users and 1 guest