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Exams

Found 723 results

  1. My current subjects are HL Math, Physics, Lang & Lit, ESS, Business, and French ab initio. I have 2 concerns with this: 1. Business and ESS are taught by the same person, and he kind of can't teach 2. Because I take Business, ESS, and ab initio, I'm afraid that it would not be competitive enough when applying to universities As a result, I'm considering one of the following: a) Take Business as a HL (have 4 HLs) b) Change Business to Chemistry c) Change ESS to Economics What do you suggest? I'm leaning towards the first two options, but I really don't know.
  2. Hello so as the teacher advised me to consider carefully about my IA experiments, I would like to do an experiment about medicines. Could you please suggest me some good experiments about them? I thought about the synthesis of aspirin but the teacher said that it takes too much time. Also, since aspirin hydrolysis is already done by another student, it is preferable to avoid this topic. Thanks for your attention!
  3. Hi, I am deciding my topics for the extended essay in chemistry and was thinking of doing something around -: - The effect of pH on the hydrolysis of aspirin or - The most effective endothermic reactions to be used in instant cold packs. (currently used water and ammonia) Please give me feedback as to how I could improve my topics and any changes that I could make to make it more suitable to the real world.
  4. Hello. I've been trying to find a topic and research question for my extended essay but I have been unable to do. I have found an experimental technique in the calorimeter which measures energy content/calories and I want to measure energy contents in different foods but I do not know what I should investigate specifically and expand on this. I don't want it to be as simple as "as x increases, y increases". Testing out different foods and seeing which one(s) have the higher calories is way too simple and I'm basically stuck..Please help!
  5. Hello Can anyone tell me how big the gap between chem HL&SL and econ HL&SL are? I'm currently taking math, chem, physics HL & english langlit, mandarin B, econ SL. Would dropping chem from HL to SL and switching econ SL to HL reduce the workload? I already feel quite overwhelmed by the amount of work from math&physics HL
  6. Hey guys! my chem IA is due tomorrow and I still need to complete my conclusion and evaluation. The last two points of my calculated data seem to be outliers and cause my trend line to have an r^2 value of 0. Without these last two points i have a linear relationship. Where do I address why these are outliers? So I take them out?
  7. Heyy! I am a student who is currently in Y11 and is going to study the IB Diploma starting next year. I would like to study astrophysics or law in uni and here are my current option choices: HL Physics, Maths AA, English Lit SL Economics, Spanish, Chemistry The problem here is that I absolutely love theatre but equally love chemistry and so I cannot choose between the to. The majority of the universities I have looked at and even spoken to do not have chemistry as a requirement but a few recommend having two sciences instead on one. I am passionate about both subjects, get the same grades in both (around an A/A*) and don't have a requirement for them in the future and therefore I am stuck in a dilemma. I really want to be able to take both, but the pressure from 7 subjects would be overwhelming but if I decide to take Theatre instead of Chemistry, I would like to take it at HL instead and have 4 HL'S + 2 SL's. But, my school isn't allowing me to do so. I would really appreciate if you could help me out and suggest which subject I should take and why. Also, if possible, could you help me find a valid point to convince my school to let me take 4 HL subjects. Thanks!
  8. 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
  9. 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!!
  10. 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!
  11. 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!
  12. 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?
  13. 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!
  14. 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!!!
  15. 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
  16. 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.
  17. so my teacher have disapproved my chemistry IA atleast twice so i need some guidance about my IA ideas related to fertilizers thanks.
  18. 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
  19. 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!
  20. 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?
  21. 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?
  22. 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??
  23. 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?
  24. 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?
  25. 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.
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