# Recent content by jkh4

1. ### 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. ### Is there any difference between Miscible and Soluble?

Thank you for the explainations :) That really helps!
3. ### 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. ### [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. ### [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. ### 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. ### [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. ### [Chemistry] Another electrochemistry question

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

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