Jump to content

Search the Community

Showing results for tags 'Chemistry'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • General
    • General Discussion
    • Debate and Discussion
    • Literature
    • Chat
    • University
  • International Baccalaureate
    • General IB Discussion
    • Languages A1/A Literature
    • Languages A2, B and Ab Initio
    • Economics and Business & Management
    • History
    • Psychology
    • Experimental Sciences
    • Mathematics
    • The Arts
    • Other Subjects
    • Extended Essay
    • Theory of Knowledge
    • Creativity, Action, Service
    • Exam Discussion
    • Pre-IB/MYP
  • About
    • About Our Forum

Categories

  • General IB Downloads
    • IB Syllabus & Data Booklets
    • IB Diploma Statistics
    • Other IBO documents
  • Languages A
    • English A1 Pre-2013
    • Other Languages A1 Pre-2013
    • Language A2 Pre-2013
    • English A Post-2013
    • Other A languages Post-2013
  • Languages B & Ab Initio
    • Language B and Ab Initio
  • Business and Management
    • Notes
    • Sample Internal Assessments
  • Economics
    • Notes
    • Sample Internal Assessments
  • Geography
  • History
    • Notes
    • Past paper responses
    • Sample essays
    • Sample Internal Assessments
  • Philosophy
  • Psychology
    • Exam Revision
    • Internal Assessments
    • Old Syllabus
  • Science
    • Group 4 Project
    • Biology
    • Chemistry
    • Physics
    • Environmental Systems and Societies
  • Mathematics
    • Notes
    • Sample HL Internal Assessments
    • Sample SL Internal Assessments
    • Sample Maths Studies Internal Assessments
  • Arts
  • Other Subjects
  • Theory of Knowledge
    • Guidelines and Notes
    • Sample TOK essays
    • Presentation examples and information
  • Extended Essays
    • Biology & Environmental Systems
    • Chemistry
    • Economics and Business & Management
    • Group 6
    • History
    • Language A1
    • Language B
    • Mathematics
    • Other Group 3 subjects
    • Physics
    • Psychology
  • University Application Essays and PS
  • Extracurricular
  • Pre-IB/MYP

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


Skype


Twitter


Exams

Found 717 results

  1. So, I decided to do my EE on distillation, but I'm not able to come up with a good research question on simple distillation (fractional would also work). I would really appreciate certain examples for the research question on distillation. Thanks!!
  2. I need help... I don't know if I should choose Chemistry HL, I was a Core IGCSE student and I'm not very good at chemistry or an overall intelligent student , I was in the top 5 but as a class we are not very good anyway.Should i choose it i have until the 3rd of November to choose my options. Ohhhh. I'm also a hardcore procrastinator and never really do things on time. Is CHEM HL really hard? or if i study will i be able to do it
  3. mads1171

    Chemistry IA

    Hi, I am currently in the process of selecting a chemistry IA topic. I want to do something in the realm of environmental science. So far, I have the idea of investigating the effect of benzolphane on the bleaching of corals? Is there any way to replicate that in a lab setting, and in regards to chemistry concepts? Or, are there any other ideas around this topic? Thanks!
  4. I want to study astrophysics at university and my IB option choice deadline is in a few days. I am debating between taking SL Chemistry or Theater Arts. Currently I am planning on taking: HL Physics, Maths, English Lit SL Economics, Spanish B, Chem/Theater The problem is that I love both chemistry and theater equally and consider myself to be pretty decent at both. I am not willing to drop any of the two because I thoroughly enjoy both so now I don't know what to do as I don't require either of them for studying physics or even astrophysics at university level. (I am taking HL English because I might consider studying Law btw) Can anyone help me out? Thanks!
  5. My internal chemical research is to evaluate different concentrations of lactic acid in calcium carbonate to determine its demineralizing effect, however I have only determined to measure the molar mass before and after and now I have no idea what dependent variable to include should I modify anything ? Is the subject simple? What should I do to improve it?
  6. My subject for the EE is chemistry, and I was wondering how far I can stretch that subject to apply to other subjects. My main idea is that I should study how cottonmouth venom is synthesized into an antivenom. The final topic is due tomorrow. However, there are a lot of problems with this topic. First of all, my TOK teacher (not my subject supervisor) told me that this topic leans too heavily into biology, but he isn’t the best resource on scientific EEs, which he admitted to me personally. Second of all, venom is a toxic chemical. Am I allowed to study this, even though I don’t plan to do am experiment myself? The subject says explicitly that toxic and dangerous chemicals are prohibited, but I’m unsure if that applies only to personally-conducted experiments, or to the topic in general. Lastly, I can’t do my own experiment in this topic, obviously. Will this cause me to lose points? These are my main problems/ questions. Any advice would be greatly appreciated! Thank you!
  7. I'm an SL Chemistry student and I've been struggling to find an idea that is easy enough to investigate in order to obtain interpretable results and difficult/complex enough to show further critical thinking and thorough application of chemistry. My initial idea was to use a simulation to figure out how the electronegativity of a nucleophile (such as the hydroxide ion, cyanide ion and ammonia) affects its bond length when it undergoes a SN1 reaction with a tertiary halogenoalkane. However, after writing up the intro, hypothesis etc. and moving onto the actual simulation work, I could figure out what simulation was appropriate and I could even use to begin exploring this topic. It was too confusing for me and so now I am thinking of looking at how temperature affects the rate of oxidation of alcohol (red and/or white wine? - and comparing the two). But now I feel this topic sounds too simple and straightforward/obvious in its answer. Similarly, I could explore the effect of temperature on the acidity of the wine / how the pH changes as temperature increases? By looking at this I could collect both quantitative and qualitative data, and possibly use a calculation linking temperature and reaction rate (maybe the equilibrium constant?? I’m not really sure). If you have any ideas on how I could make this into a good IA, please help!!!
  8. Hi, I'm doing an IA on medicinal chemistry and how the structures properties affect absorbance. but i can't find any absorbance data Can someone help me to find some numerical data to make graphs, or help brainstorm ways to showcase data. warm regards, Keirra M
  9. Here is my Chemistry EE Topic and Question that I have developed: Topic: "A comparison of NaOH and CaO as alkaline catalysts in the transesterification reaction of Vegetable Oil to Bio diesel based on Green Chemistry Principles" RQ: “How would NaOH and CaO compare as alkaline based catalysts in a green synthesis of bio diesel from the transesterification of Vegetable Oil?" Independent Variable/s: Type of Catalyst - Homogeneous (NaOH) and Heterogeneous (CaO) [amount and concentration are control] Dependent Variables: Rate of Reaction Yield of bio-diesel Produced (might replace this with something else since yield is not affected by the catalyst; suggestions?) Amount of dissolved catalyst in produced bio-diesel (it affects the performance of the fuel) Thoughts? Questions? Comments? Concerns? I'd appreciate some constructive criticism with anything on this post. I'm trying to get a solid grasp of my topic at this time so anything helps! Please point out the uncertainties and invalidities and I'll be thankful.
  10. so my teacher have disapproved my chemistry IA atleast twice so i need some guidance about my IA ideas related to fertilizers thanks.
  11. I just started SL Chemistry and my teacher has almost no training in chemistry. He hasn’t given us a syllabus and it’s been four weeks into school. I think my school offers ESS with a great pass rate, but I would like to study physics and I think I’ll stick it out...even though almost no one passes the IB Chem exams. i want to start now and get any textbooks or note taking guides you guys might have. My teacher is not helping at all, I am quite in need of help. Thanks, Crumbling-IB-Stduent
  12. Hello, I need help deciding what topics to pursue. The topic I really want to do is how do the different isomers of butanol affect the yield of carboxylic acid in primary alcohol oxidation. I am planning to do some reflux experiments with this. Unfortunately, I thought this topic was well researched but it seems perhaps the mechanism has ok research but not the compound. So I am having research problems, but I can probably generate more theory since I essentially will talk about elements of molecular geometry that affect its oxidation. I have abundant ideas of further research topics for this if I down this route (ex. what if I use phenol or what if its the same formula but different pattern of bonds?). Currently, the research I have may suffice, but I will have to piece the research together (for example I have research talking about butanol as a compound, then combustion data..etc) to develop it to be adequate. The other topic I feel uncomfortable with, but A LOT of research is written about it. It involves seeing the efficiency of hydrogen production when using a strong base or strong acid. If I go down this route, I will be conducting experiments of electrolysis. I have found abundant research for base electrolytes, but it feels kind of answered and I just have a faint idea of how I am going to discuss this in theory. I would love to hear your opinions and thanks too!
  13. Aseya

    Changing Subjects

    Hi. I am just now entering my second year of IB. I am taking chemistry SL & psychology HL (online) and would like to change from both. Throughout last year I unfortunately didn’t take psychology that serious and am finding difficulty in it (my expected grade is probably going to be very low). And for chemistry, its hard and it’s going to require more effort than necessary. So I wanted to change from chemistry to arts (since my school finally has arts this year) and from psychology online to film online. Since I have a strong background in both, is it possible to do them both in the second year?
  14. Hello Ive just started the IBDP program, and I am currently taking physics SL for my experimental science subject. Although I did okay with topic one (was sometimes confused in class though was able to understand with revision) . I am not good at maths, and am aspiring to study psychology in the future. SHOULD I change to chemistry SL instead of physics SL, considering how apparently chemistry has somewhat easier maths than physics? What are the differences among these subjects? If I’m bad at math, should I not take physics SL?
  15. My sl chemistry exam is coming up in a few weeks, and I´m really struggling with studying. I started studying(wrote notes following the syllabus, read the textbook, watched a few videos, did multiple choice questions) a few weeks ago and have already gotten through most of the topics. However, whenever I try a past exam or questions in the textbook´s chapter review, I just can´t seem to do it. I seem to just completely forget whatever new information I learnt the day before, or how I´m supposed to solve certain problems. I´m starting to feel stressed since my exams coming up soon, and wanted to know how others studied for their chem exam. What worked and what didn´t? Any general tips on how to do well on the exam??
  16. For my IA, I'm trying to find the activation energy of a glowstick reaction (phenyl oxalate ester + hydrogen peroxide). Using the Arrhenius equation and the integrated rate laws, and using this link as a guide (https://www.westminster.edu/about/community/sim/pdf/SLIGHTSTICKKINETICS_001.pdf), I was able to come up to a certain point. I have two questions. In the link, I see that it used first-order kinetics in order to create an equation that relates rate of reaction to temperature (with activation energy/R being the slope). However, as far as I know, first-order kinetics only applies to chemical reactions with one reactant. I then looked at another source, which breaks up the chemiluminescence process into several steps, as shown by this source (http://cartwright.chem.ox.ac.uk/tlab/experiments/X3_kinetics.pdf). Was the formula in the first link regarding the decomposition of the peroxyacid ester? My second question is that in the first document, it creates an equation that shows a linear relationship between rate of reaction and illumination. Would illumination be illuminance which could be measured in lux?
  17. I was reading through some past chemistry IA examples and found a research question that I thought was really interesting and quite unique. I was wondering if it would be okay for me to use the same research question and essentially the same procedure, or would that be plagiarism?
  18. My Chemistry IA topic is focused on determining the calcium in milk by using the edta method (actual research question: How does the concentration of the calcium ion content relate to the temperature of the cow milk by using the EDTA titration method?) and I want to express my interest for my personal engagement. I am already doing research about the Calcium and EDTA things and the importance of Calcium and Milk in diet.
  19. Hi I'm looking to go into the medical field in university but I'm not sure whether I should take HL Math or HL Psych. As of right now, I really want to study neuroscience in uni and I know Psych would help with that but at the same time, HL Math might be really important especially with calculus and all. My current subject choices are: HL Biology, Chemistry, Psych/Math SL English Lang Lit, Chinese B, Psych/Math Please let me know what you think is best and in general what you think of the subject combination. I know it will be extremely challenging and I'm scared but I like the subjects and I really want to head into the medical field. Thank you!
  20. Hey!! I'm starting IB in less than a month and I already chose my subjects because I wanted to major in Psychology. However, I am now leaning towards veterinary science. At first, I chose bio SL. To be a vet, I first need to have a bachelor degree in Biological Science. The uni I plan on going does not require chem. But, if I do major in biological science, there will be some chem classes. I am for sure taking Bio but I am not sure if I should move it to HL and add Chem SL. My question here is how hard is BIO HL compared to BIO SL? (I'm interested in bio) Will chem SL help me in uni (Biological Science major) even though my uni does not require it? should i take it? (I'm really bad at math and I do not really enjoy chem and I found the intro class hard but I did not really pay attention)
  21. Hello, thanks in advance for your answer. My friend has a very high probability of repeating one year. Under what conditions does a person stay in the second year in ib (11 grade) ? If in the first term (grade 11) the student receives 1,2,2,7,5,6. And in the third term (grade 11 ) he has 7,6,7,3,2,4 + A (TOK) will my friend have repeat a grade ? (Retention one year ) (CAS has done ) My friend is very nervous about this, but I don't know anything about falling conditions in ib. Thank you 😊
  22. My chemistry IA investigates the different activation energy of the decomposition of H202 with Lead oxide and manganese oxide. My teacher told me to plot 1/Temp against Ln x 1/ Average Time taken but not how to actually calculate Ea. How do I get the activation energy if I have the time it takes for the percentage of oxygen to rise by 15% at 5 different temperatures and have it plotted 1/Temp against Ln x 1/ Average Time taken using the Arrhenius equation.
  23. Hello, has anyone there done an IA in chemistry about activation energy and could share some tips or their marks with me? I have a topic of What is the activation energy of the decomposition of hydrogen peroxide (H2O2) in presence of catalase, by measuring the time taken for 10cm3 of oxygen gas to be evolved at different temperatures? Either at different temp or also without catalase and with MnO2? My justification, in brief, is that H2O2 is present in cells and catalase is needed to break it down so that it isn't harmful and therefore low activation point is important (and I want to see a) what it is b) alternatively how does it compare to reaction without catalase). My teacher says that it's not really a good topic because there's no reason for this experiment and perhaps I should at least compare it with catalysts that include elements that are in human body, but there aren't really such as for example we're better off without Pb in our body. What do you think?
  24. Hi guys, I just wanted to ask if you think these topics are suitable for my Chem HL IA: -Either the pH change of water over a period of time and how it is affected by the temperature -The rate of reaction of glowsticks at different temperatures(Using a light sensor). I would be open to suggestions on titration reactions that I could do. Thanks in advance
×
×
  • Create New...