Recent content by Fig Neutron

@DrJohn Thank you very much for taking the time to break this process down for me. I really appreciate your help!

For my organic chemistry class, we defined oxidation and reduction this way: Oxidation is the addition of O/O2, addition of X2 (halogens), or loss of H2. Reduction is the addition of H2/H-, loss of O/O2, or loss of X2. I also found it useful to think of oxidation as the conversion of a C-H...

I need some help understanding the LC/MS process for proteomics. I am writing a paper on using LC/MS to detect nut allergens in food. My problem is that I have never used LC or MS so I do not understand the process in the lab. The resources I have found are too complicated. I am a 3rd year...

I appreciate all of your thoughts. I didn’t make it very clear in my original post, but I should add that we are going for an improvised way in. Sorry that this wasn’t clear.

Hello everyone, I am working with a writer on a book that is bordering on science fiction but set in modern day Earth. Here is the issue. There is a titanium case with high-carbon steel pins in the hinges. (Think of a sophisticated military weapons style of container.) The characters in the...

@epenguin Sorry, by saying “wasn’t marked off” I meant I did not receive any deductions. Unfortunately, as you noticed, I still do not understand the question as well as I would like. But, current events have made it difficult to communicate with my instructor since all classes are now in an...

I calculated the pH with the addition of the HCl to the solution from part a to be 3.38. It is the same answer that I got for part a, but I wasn’t marked off. Perhaps because there wasn’t a significant enough amount of HCl being added to make a noticeable difference in the pH? Then I calculated...

@epenguin Thank you very much for your help. I appreciate your time. Your clarifications made it much easier to understand and solve the problem. I did manage to get the question right. :smile: And thank you to everyone else for helping.

I am not completely sure, but I believe it is being added to the value from part a. In my first post I guessed that the moles of HCl would be added to those concentrations (.25 M/.75 M) I used in the Henderson-Hasselbalch equation, but I don’t know the volumes. It is moles per liter, but I...

So, it would be a neutralization reaction. Also, I apologize you are both correct. The question should be: Recalculate the pH after the addition of 0.05 ml of 0.1 M HCl. Compare this value with that where the same 0.05 ml of 0.1 M HCl is added to the equivalent amount of pH 7 water. You may...

Thank you for your help. I’m not exactly sure what the reaction would be. Question b is a bit confusing. The first addition of HCl I believe is into the lactic acid from part a, but I may be wrong. Since the HCl dissociates completely, I believe the pH would be decreasing. And for the second...

This is for a high school chemistry class. In part a of the question, I calculated the pH of the solution to be 3.38. Part a was the question: Calculate the pH of a solution containing 0.75 M lactic acid (Ka= 1.4 *10^-4) and 0.25 M sodium lactate. For part b I am having trouble determining how...

I was just asked to do this calculator yesterday. Originally I looked at it from a molality standpoint, but in the end ratio and proportions was much easier.

Did you hear about the kidnapping at school? It’s fine, he woke up.

My wife is really mad at the fact that I have no sense of direction. So I packed up my stuff and right.