Senior Members
  • Content count

  • Joined

  • Last visited

Community Reputation

1 Neutral

About FrankP

  • Rank
  • Birthday 02/04/91

Profile Information

  • Gender
  • Location
    New Jersey
  • Interests
    Basically Everything and anything
  • College Major/Degree
  • Favorite Area of Science
    Physics, Bio, Chemistry, Sports
  • Occupation
    Student & Personal Trainer
  1. Ok I will check to see if I can find anything online as it pertains to general chromatography first. I actually forgot that TLC is only one aspect of Chromatography, since it is the only form we use at my school. Thank you I appreciate it
  2. About TLC (curiosity) So we do a lot of TLC analysis as well as melting point testing in my organic chemistry class this year. The reason I am asking more in depth on TLC is I get the concept of TLC. You use a board and solvent to extract and confirm purity of a polar substance based on the resulting Rf values. This makes sense to me through and through. My curiosity is that I want to understand better the intricate workings of this. I am not good enough to look at the molecular structures of say for example Naphthalene, Benzoic Acid, Aspirin, Caffeine etc. and say ok out of these 5 the order should ideally be (X,Y,Z…) I believe this stems from my lack of grasp on the solvents being used. I feel that still I am not confident in explaining why some substance is more ideal as a solvent than is another. I know it is based on affinity of that molecule and its polarity to the solvent. Example is why hexane is used in extracting non-polar molecules from water as it is a better solvent for such. I also understand that polar covalent bonds are water soluble while non-polar covalent are more soluble in oil. I guess I am looking for suggestions on where to read more about TLC I looked in my colleges library yesterday but there was a book that was written in 1970’s and was extremely advanced for my base knowledge of organic chemistry or chemistry as a whole for that matter. This is my spring break week so I have some time to do some reading I know that when I come back we are going to be hammered with work and on the final there will likely be several questions that involve explaining TLC and how it works. Thank you, in advance as always!
  3. I tend to agree we ended up having to do only 2 trials of each I think because the lab was such a short period. We did about an hour of intro, expectations etc.. so that significantly ate into the time plus we had to confirm all the contents for our lab lockers which took about 25 minutes. I would have liked to get more conclusive data to be honest because I feel a little funny making a conclusion based off 2 trials.
  4. Hello again everyone! So this post is less dramatic and doomsday-ish then all my others have been as it pertains to chemistry at least. Lab 1 was Monday for me, our aim was to use the Thomas-Hoover Apparatus to discover the melting point of our unknowns. So I wanted to first state that I understand how to perform the lab, as a small group we did well on the lab experiment (except for one minor error which happened on our first trial but that was quickly adjusted). I just wanted to post to get more insightful opinions on how I can formulate my ideas on why things went the way they did. The chemicals we used for my group were: biphenyl [Melting Point] 69-72 °C 2,5-dimethyl phenol [Melting Point] 68-71°C So my group suspected that our compound was 2,5-dimethyl phenol because trial one of the strict non-mixed MP test showed a range of 69-71. Then trial 2 was a mixed where we took biphenyl and the unknown as well as 2,5-dimethyl phenol and the unknown and ran 2 separate trials to see if the melting point was altered at all within the trials. We discovered that the trial with biphenyl had a slightly higher melting point as was 2,5-dimethyl phenol + unknown. So we were able to confirm our original hypothesis that our unknown was 2,5-dimethyl phenol. So my question is (drumroll please lol jk) given the situation that happened above in our experiment would it be scientifically accurate for me to make my conclusion as such? The unknown compound was confirmed as 2,5-dimethyl phenol after 2 trials of mixed melting point testing. This is confirmed on the grounds that the melting point across the two trials did not differ from the original non-mixed melting point test of our unknown; thus confirming that there were no impurities and the mixed melting point test was in fact a mixture of the unknown substance with itself. While further testing confirmed that biphenyl mixed with the unknown compound altered the melting point by 1 degree. This while apparently insignificant at first upon further testing in trials 2 and 3 of the same mixture confirmed a melting point shift of 1 degree. Therefore this test showed an impurity was mixed with the original unknown, which was made clear by the shift in melting point. Since this is the first lab experiment and assignment I have had for any organic based chemistry class I want to make sure that my rational is at least correct. Thanks again!
  5. Thanks, yea I will give this a try I think java stopped in college when we got to GUI based programming. I vaguely remember trying to code a group project where we had to make a program which was visually appealing but also interactive. That was the hardest thing from what I can remember. Also didn't help that I was doing a group project by myself. lol Thanks to you as well. I am as we speak re-learning HTML, and some CSS as well. I typically am a self-directed learner so I do know what you are saying about trying to program apps to fix my academic problems. I remember back when I was doing C++ I made a calculator type program to solve my difficult pre-calc problems back in high school that was the greatest thing for homework haha! So as far as websites are concerned though I want to be able to eventually have interactive content, such as websites which contain moving graphics, more advanced GUI and such. Would that all be available through CSS now? or would I have to embed something like JS or use some more advanced web design code? Like I said back when I was doing websites (not that I am old) I was doing them on HTML 4 which I now understand the modern HMTL is drastically different in almost every way.
  6. This was prob the easiest way anyone could have explained this nice job. I have favorited this for future use by myself as well. I know I will end up needing this down the road.
  7. This website functions fine for me so I will have to upvote those before me that state that it has to be something malfunctioning on your end. Hopefully you get this resolved it seems as though those above have given some pretty good resolutions. Best of luck Haha this is funny because I was saying the other day [iT 101] = Turn it off turn it on recheck lol
  8. Hey friends, So I started programming about 2003-05 when I was learning HTML I was only in 7th and 8th grade at that point I just always loved it. Then I continued in high school my school only offered 2 C++ Classes that was in 07 & 08. Fast forward I graduated High School in 2009 and went to college for computer science. I did 2 years in that major learned 3 semesters worth of JavaScript with BlueJay. Unfortunately I can't remember any of it because I switched majors to something totally different because I hated the department and teachers. Nothing against anyone but I had 5 semesters of heavy accented teachers and wasn't really learning anything. I digress back to my point (sorry). I am going to school currently for Biolog and plan to go into something medical be it Physical Therapy, Orthopedics, sports medicine idk yet. I want to get a masters in Computer science at some point because I have career plans that I would love to be able to do myself by programming the necessary applications to assist me in my future work. Is there any coding languages and resources you guy would recommend since I am super outdated in this field of study. My overall goal for coding is to be able to make multiplatform computer-based exercise and rehab programs. A website for myself which I can embed this program in also as well as a few other things that will come later on as necessity presents itself. Just looking for some guidance from some real experts who are current in this field thanks in advance. Sincerely, Frank
  9. Ok thanks guys this is a lot more helpful then I thought it would be. I will get going on some readings and videos. I do understand the general chemistry stuff ok... I would not say a master I mean I would say above average as compared to the people I go to school with but that isn't saying much. So I will look into the book and contacting the teacher as well. For now I will actually get going on some reading and videos. Since last semester was with notoriously the worst teacher at my school I am sure the level of BS will be significantly lower than it was. Lol which is going to be a nice change of pace. Hopefully all of you guys enjoy the holiday's I will keep an eye out on the forum to see if anything pops up that is relevant to me! Sincerely, Frank Thanks for all the help as usual and yes we did do quite a bit of talking about my issues with stoichiometry last semester! haha
  10. Ok so this question is less about the subject and more about where do I start. I have organic chem next semester and my winter break starts tomorrow. I want to get ahead on this reading beforehand I was wondering where do you guys in your experience think the best place to start on organic chem is? We left off on Acid and Base Equilibrium, net ionic equations etc... Idk if that has anything to do with organic or not but I am just looking for a little guidance. Thanks everyone!
  11. Ok sorry for this back and forth at this point I'm probably frustrating everyone. I did try to answer your Boyle's law question as it pertains to pressure and volume. "Boyles law says volume and pressure are inversely related. How to adopt that to 100' depth of seawater I am not sure. " (that is whatI said) Sidebar: So this question is physics not chemistry?
  12. I understand what you are saying. I'm not dumb, I get it, I have 3 weeks left in the semester. The point of me picking up physics books and re-learning everything would make no sense. As it is I am still in the top 5% of this class in terms of grades. This class is an introduction to chemistry. For undergraduate students at a non-technical institution where less than 1% of all majors granted on a yearly basis are in the field of science. For this teacher to assume that any of the students she is teaching know what you are insisting that the average person knows is a fallacy on your end. Please either contribute to the topic or back out of the thread.
  13. Thanks for that tidbit of your personal opinion there. Contributions to the conversation in a positive direction seem to be your specialty. If you do not plan to assist in the conversation then I will sincerely ask for your resignation in this board. I lack general knowledge because it has been 10 years since I have taken a class which required this knowledge. Also FYI this is a chemistry class. Being that this event is occurring under water I understand that g=gravity and I know 9.8m/s^2 is the value for gravity It would not be my first guess. Had this been a balloon accelerating from a kids hand filled with He gas I would have considered Gravity in the equation so pardon my inability to draw conclusions being that we have not even mentioned gravity one time in my chemistry class 'it must have slipped my mind'... ok so I tried this but the problem is I don't understand how I am supposed to integrate gravity. We have never done anything like this.. I have looked on every website and everywhere in my textbook and I have not seen anything that would consider this question chemistry.... So I will try and solve it using the formula you provided me.. Boyles law says volume and pressure are inversely related. How to adopt that to 100' depth of seawater I am not sure. I don't understand how to mix the two together, though. How can I multiply (1.025g/cm3)*(9.8m/s^2)*(100ft) all those units are inconsistent. If I convert 9.8m/s^2 to Centimeters its still going to be squared not cubed. and if I convert 100ft to centimeters in height I will have the following units ( Grams, cm3, cm2, cm) i understand when you multiply you can add exponents but does that really apply to this?
  14. No I have never seen that so its P= (1.025/1cm^3) x (grams) x (100') Where Pressure and Grams are unknown the only other way I can think to get grams is this: (Density CF) * (1ml -> L CF) * (MW H2O CF) = (Moles H2O / L) (Moles H2O / L) *(1liter/ML) * (1ml/1cm3) = (.0569 mol H2O/ Cm3) (.0569 mol H2O/ Cm3) * 2.832x106 = 161140.8g H2O Total in the entire 100 ft3 column. To be honest the math I just did above to me sounds horribly wrong it sounds like im just trying to do something to get a value for grams lol that is what is getting me pissed. Im literally playing a guessing game now... the file I attached below has already been attached but I took the number of 56.913 mol/liter (that is a type mole/g sorry about that) that I got and took it one step further to get (g H2O / Cm3 so I could use that conversion factor to multiply by the Cubic volume of the entire 100 foot column. How about this I tried to use. Your idea to find the total pressure at the bottom I'm not sure if this is right
  15. Well we just touched on Boyles law in passing today we hadn't actually done any problems with it so I guess that might help me let me check it out and get back to you... Boyles law assumes that 2 of the variables remain constants right? Assuming an inverse relationship to volume and pressure.. Oh man... lol lemme see if this works ___________________________________________________________________ Ok so I get what you said here P1V1=K1=P2V2 or more ideally --> (P1V1=P2V2) I get this equation but my question is I don't know the pressure or the volume but now im stuck just with a different equation I am able to get moles of H2 O and moles of Mercury using the density and that is the only mathematical calculations I can perform without using google to tell me the pressure at a depth of 100 feet. Which I do not want to do because I know that I won't be able to use google on my exam.