Question
Not sure if I did number 4 correct.
4) Determine the pK, and calculate the K, of the unknown acid.
Mass of Unknown 2.40 g
Sample Value Unit Initial burette volume of NaOH 2.00 ml Final burette volume of NaOH 18.00ml Fast Titration #2: I Sample Val
I Slow Titration: Volume of NaOH/mL pH Volume of NaOH/mL pH Volume of NaOH/mL pH 15.00 ml 4.70 15.75 ml 6.23 16.23 mL 12.14 1
experiment #8 dlution ned_ Moi Pt in liters. 15.78 €3 1. Moles Of Strong base required to leach equwa lence point molavityor

The half way point was 7.89mL with a pH of 3.42
0 0
Add a comment Improve this question Transcribed image text
Answer #1

By convention, pH is equal to pKa at half equivalence point. So, the pKa of acid is 3.42.

Ka = 10-pKa = 10-3.42

= 3.80189 × 10-4

= 3.80 × 10-4

Add a comment
Know the answer?
Add Answer to:
Not sure if I did number 4 correct. The half way point was 7.89mL with a...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

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
  • The half‑equivalence point of a titration occurs half way to the equivalence point, where half of...

    The half‑equivalence point of a titration occurs half way to the equivalence point, where half of the analyze has reacted to form its conjugate, and the other half still remains unreacted. If 0.4400.440 moles of a monoprotic weak acid (?a=7.2×10−5)(Ka=7.2×10−5) is titrated with NaOH,NaOH, what is the pH of the solution at the half‑equivalence point? pH=pH= 2) A volume of 500.0 mL500.0 mL of 0.120 M0.120 M NaOHNaOH is added to 565 mL565 mL of 0.250 M0.250 M weak acid...

  • Not sure about my answers. So I would like to see Half equivilance point, pKa, Ka...

    Not sure about my answers. So I would like to see Half equivilance point, pKa, Ka and molarity of acid values worked out from these graphs. Impotant data: titration of 25.00 +/- 0.01 mL of unknown acid by 0.1069 M NaOh. Two runs were done, but data calculations for ony one is needed now (they sets are nearly identical).. 12 10 pH Titration Curves (pH vs. mL NaoH) eequiv. Rint 25 NaOH (mL) inch 9 inch Trial 1 CT.) e...

  • It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration...

    It's a weak acid strong base titration Experiment 4: Identification of an unknown acid by titration Page 2 of 15 Background In this experiment, you will use both qualitative and quantitative properties to determine an unknown acid's identity and concentration. To do this analysis, you will perform a titration of your unknown acid sample-specifically a potentiometric titration where you use a pH meter and record pH values during the titration, combined with a visual titration using a color indi- cator...

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
ADVERTISEMENT