HomeworkLib
Question

If you mix 60mL of 0.2 M acetic acid with 80mL of 0.4 M acetate, what...

If you mix 60mL of 0.2 M acetic acid with 80mL of 0.4 M acetate, what will be the resulting pH. Then how many total milliliters of 1M NaOH can you add to the solution and still have a good buffer? (that is, within 1 pH unit of pKa).

science   chemistry   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

1)

mmoles of acetic acid = 60 x 0.2 = 12

mmoles of acetate = 80 x0.4 = 32

pH = pKa + log (acetate / acetic acid )

pH = 4.74 + log(12 / 32)

pH = 4.31

2)

pH   = pKa + log (acetate + V / acetic acid - V)

5.74 = 4.74 + log (acetate + V / acetic acid - V)

(acetate + V / acetic acid - V) = 10

12 + V / 32 - V = 10

12 + V = 320 - 10V

11 V = 308

V = 28 mL

volume of NaOH needed = 28 mL

0 0
Add a comment
Know the answer?
Add Answer to:
If you mix 60mL of 0.2 M acetic acid with 80mL of 0.4 M acetate, what...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • You need to prepare an acetate buffer of pH 6.29 from a 0.704 M acetic acid...

    You need to prepare an acetate buffer of pH 6.29 from a 0.704 M acetic acid solution and a 2.48 M KOH solution. If you have 575 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 6.29? The pKa of acetic acid is 4.76. You need to prepare an acetate buffer of pH 6.29 from a 0.704 M acetic acid solution and a 2.48 M...

  • If you mixed 50 mL of 0.1 M TRIS acid with 60 mL of 0.2 M...

    If you mixed 50 mL of 0.1 M TRIS acid with 60 mL of 0.2 M TRIS base, the resulting pH is 8.67. How many total mL of 1 M NaOH could you add to the solution and still have a good buffer (i.e. within one pH unit of the pKa which equals 8.3)?

  • You need to prepare an acetate buffer of pH 5.92 from a 0.727 M acetic acid...

    You need to prepare an acetate buffer of pH 5.92 from a 0.727 M acetic acid solution and a 2.95 M KOH solution. If you have 575 ml_of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 5.92? The pKa of acetic acid is 4.76.

  • You need to prepare an acetate buffer of pH 6.31 from a 0.848 M acetic acid...

    You need to prepare an acetate buffer of pH 6.31 from a 0.848 M acetic acid solution and a 2.32 M KOH solution. If you have 675 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 6.31? The pKa of acetic acid is 4.76.

  • You need to prepare an acetate buffer of pH 6.43 from a 0.723 M acetic acid...

    You need to prepare an acetate buffer of pH 6.43 from a 0.723 M acetic acid solution and a 2.47 M KOH solution. If you have 725 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 6.43? The pKa of acetic acid is 4.76.

  • You need to prepare an acetate buffer of pH 6.16 from a 0.744 M acetic acid...

    You need to prepare an acetate buffer of pH 6.16 from a 0.744 M acetic acid solution and a 2.88 M K OH solution. It you have 575 m ot the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 6.16? The pKa of acetic acid is 4.76 Number mL

  • You need to prepare an acetate buffer of pH 5.97 from a 0.724 M acetic acid...

    You need to prepare an acetate buffer of pH 5.97 from a 0.724 M acetic acid solution and a 2.30 M KOH solution. If you have 575 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a bufer of pH 5.97? The pKa of acetic acid is 4.76.

  • Suppose you want to make an acetic acid/acetate buffer to a pH of 5.00 using 10.0...

    Suppose you want to make an acetic acid/acetate buffer to a pH of 5.00 using 10.0 mL of 1.00 M acetic acid solution. How many milliliters of 1.00 M sodium acetate solution would you need to add? The pKa for acetate buffer is 4.75.

  • You need to prepare an acetate buffer of pH of 6.39 from a 0.876 M acetic...

    You need to prepare an acetate buffer of pH of 6.39 from a 0.876 M acetic acid solution and a 2.52 M KOH solution. If you have 775mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 6.39? The pKa of acetic acid is 4.76.

  • 1. You need to prepare an acetate buffer of pH 5.93 from a 0.833 M acetic...

    1. You need to prepare an acetate buffer of pH 5.93 from a 0.833 M acetic acid solution and a 2.56 M KOH solution. If you have 475 mL of the acetic acid solution, how many milliliters of the KOH solution do you need to add to make a buffer of pH 5.93? The pKa of acetic acid is 4.76. 2. If a buffer solution is 0.110 M in a weak acid (Ka = 1.6 × 10-5) and 0.570 M...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT