(Mitx Ungraded question-Acids and bases!)

The value of pKa for acetic acid, CH3COOH (aq), is 4.75. Calculate the pH and the pOH of 1.1 M CH3COOH (aq) in water.

Question

(Mitx Ungraded question-Acids and bases!)

The value of pKa for acetic acid, CH3COOH (aq), is 4.75. Calculate the pH and the pOH of 1.1 M CH3COOH (aq) in water.

jadedry · Answer

-A) find pH

-B) find pOH

Unfortunately, I don't have a clear idea of how to go about this. I know that I have to find the ratios, and subtract the PH from ?14?. But other than that I'm clueless.

Thanks in advance!

aaronq · Answer

Write a the dissociation equation, make an I.C.E. table and use the $K_A$ in an equilibrium expression to solve for $H^+$.

from there use:  $\sf pH=-log[H^+]$ and $\sf pH+pOH=14$

jadedry · Answer

Thank you! I managed to solve it! c: