Do you mean 0.5 m or 0.5M. I see you don't seem to know there is a caps key on the keyboard. There is and I suggest you find it. m means molality and M means molarity. I assume you meant M. The next assumption is what volume do you want. Let's say 1000 mL.
pH = pKa + log (Ac^-)/(HAc)
Look up pKa, substitute into the equation, and solve for the ratio of (Ac^-)/(HAc). That is equation 1.
Eqquation 2 is HAc + Ac^- = 0.5.
Solve the two equation simultaneously for (HAc) and (.5)
Now, knowing (HAc) and (Ac^-) and that you want a liter of solution, calculate grams HAc and Ac^-.
Post your work if you get stuck.
you want to make a 0.5 m acetate buffer at a ph = 5.5. how much acetic acid and base should you mix
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Your prof PROBABLY wants you to add NaOH to HAc to prepare but you didn't show molarity of acids or bases available so I didn't do it that way.
1 answer