Achieve #4 (Due Week 3)

[asheagg3I]

Hi,
Can someone help with this question?
Do you solve it the same way you would if you were given Ka?

[Teresa Dinh 3L]

Hi,

Yes you do.

We need to find HB and them from there we could find pOH and then eventually pH.

[Simone Byun 1F]

Yup, you can solve for the concentration the same way as if you were given the Ka. However, you have to remember that you are finding the pOH, so to subtract 14 - pOH to find the pH.

[KatieWu 1E]

Yes it would be the same way. Except there's a different rule for x being small enough to ignore. For weak bases it's if the initial concentration is more than 1000 times greater than Kb.

[Erin Chin 1L]

Hi! Yes you would solve the same way as if you were given Ka. You would still set up an equation to solve for x using an ICE table and then your x value can be used to solve for pOH. Once you have pOH, you can find the pH by subtracting your pOH value from 14.

[Eszter Kovacs 1A]

Yes, you can calculate pOH from Kb and then the pH.