Recent content by jkh4

  1. J

    Bromination and Nitration

    Homework Statement 1) What other nitration products in a electrophilic nitration of benzoic acid would be formed if each reaction were carried out at a higher temperature? 2) The nitration of hydroquinone leads to a low yield of nitrohydroquinone. Propose the structure of the major product...
  2. J

    Is there any difference between Miscible and Soluble?

    Thank you for the explainations :) That really helps!
  3. J

    Is there any difference between Miscible and Soluble?

    Are there any differences between the terms Miscible and Soluble? I am kind of confuse between these two terms. Are they interchangeable? Thank you!
  4. J

    [Chemistry Lab] Isolation of Aldehyde and Carboxylic Acid

    [Chemistry Lab] Cannnizzaro Reaction Hi! I am having some questions about my chemistry lab. In the lab we are given 1 of the 5 unknown aldehyde (benzaldehyde, anisaldehyde, nitrobenzaldehyde, chlorobenzaldehyde, and dimethoxybenzaldehyde) and reacts it with methanol and KOH to undergo...
  5. J

    [Chemistry] Calculation of Pt potential

    Homework Statement Calculate the potential of a Pt electrode immersed in a solution that is 0.0263M in K2PtCl4 and 0.1492M in KCl. The answer given in 0.78 Homework Equations E = Eo - 0.05912/2 * log Q (Nernst Equation) The Attempt at a Solution We try looking at the reduction of PtCl4...
  6. J

    Mass balance/Charge balance

    Can somebody explain how do you write a Mass Balance or Charge balance for a acid-base equilibrium? Let say, if you are given 0.01M Zn(OH)2 in a saturated NaOH solution and also given that Zn(OH)2 + 2OH- -> Zn(OH)4(2-) how would you solve the mass balance/charge balance? I really have no idea...
  7. J

    [Chemistry] Another electrochemistry question

    so in this case, k is 1.1×10^16? cause when i try the quadratic on the internet quadratic solver, it says the answer is an imagary number....
  8. J

    [Chemistry] Another electrochemistry question

    but since the k is such large number, [Ce4+] is going to be large too right?
  9. J

    [Chemistry] Another electrochemistry question

    1. Homework Statement Given the following half-reactions: Ce4+ + e− → Ce3+ E° = 1.72 V Fe3+ + e− → Fe2+ E° = 0.771 V A solution is prepared by mixing 7.0 mL of 0.30 M Fe2+ with 8.0 mL of 0.12 M Ce4+. Calculate [Ce4+] in the solution. I've got the potential of a platinum electrode...
  10. J

    [Chemistry] Membrane Potential

    [Chemistry] Another electrochemistry question Homework Statement Given the following half-reactions: Ce4+ + e− → Ce3+ E° = 1.72 V Fe3+ + e− → Fe2+ E° = 0.771 V A solution is prepared by mixing 7.0 mL of 0.30 M Fe2+ with 8.0 mL of 0.12 M Ce4+. Calculate [Ce4+] in the...
  11. J

    Electrochemistry question

    What is the different between spontaneous reduction and spontaneous oxidation? For spontaneous reduction you need to have Ecell to be (+), then what about spontaneous oxidation? Thanks.
  12. J

    Questions about Diels Alder reaction

    I am doing a research on Diels Alder, and I just want to know what are some of the history and applications of Diels Alder? Thank you.
  13. J

    PKa of phenol lab

    Homework Statement I am working on a lab about pKa of phenol, and I don't understand how to do the following questions. Can someone please kindly help me?? 1) Why was the rinsing of glassware with acetone not allowed in this experiment? T/F Acetone has a UV absorption itself and causes...
  14. J

    PKa of Phenol

    what about the ratio of phenol and phenoate? is that mean the ratio of concentration?
  15. J

    PKa of Phenol

    please help!!!! questions on pKa of Phenol Hi, I have some questions regarding the pKa of Phenol lab that I am working on right now. 1) What would cause the absorbance curves to not go through the isosbestic point? For this one, I know that isosbestic point is not pH dependent so pH won't...
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