Chemistry
For Chemistry Discussions
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This thread could be used for the new syllabus IA from 2016 onwards. Please note that I cannot help individual students with their IA. The choice of topic should be your own work so please do not ask for suggestions for your IA. The following information is taken from the May 2015 subject report (I'm sure it is copyrighted to the IB, but I see no harm in sharing it with IB students). Research question: Encourage students to choose a research question that has a degree of challenge, is of interest to them and one where they do not know at the outset what the outcome will be.A good research question will probably try to determine a trend or relationship. Students shou…
Last reply by IBsciencewhiz, -
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My teacher told me that an IB study guide would be very helpful going through Chemistry and I started looking online for a book. But, when I look on Half.com, there are two books for IB Chemistry, a course companion made in 2010, and a study guide made in 2007. I was wondering which is the better one to get in order to study for the IB exam and assist with explaining concepts. I am not sure what the differences are between the course companion and the study guide, so I need to know which one is better to buy. If it helps, I'm taking SL Chemistry and the teacher is very good but there are a few topics where I need to refresh on from Chemistry I (Sophomore Year).
Last reply by IBsciencewhiz, -
Hey people, I've been away for a while. The good thing is that I'm back and I'm willing to help any Chemistry student with their problems or doubts. I'll be glad to help you with questions regarding lab reports, designs, theory or even on how to approach the actual paper. I hope to be useful. Thanks in advance. Regards
Last reply by IBchemistry, -
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Here are the links to my website and YouTube channel. I have a full range of videos for both SL and HL topics including options A, B, C and D. Website: http://www.msjchem.com/ YouTube channel: https://www.youtube.com/user/mikesugiyamajones Option A: Option B: Option C:
Last reply by Tragic Survival Chances, -
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With the first exams for the new syllabus coming in May 2016, you could ask questions and post resources for the option topics here. For option B, I have a complete set of videos for SL and HL. I will be working on videos for option C next. Option B SL: http://www.msjchem.com/sl-option-b.html Option B HL: http://www.msjchem.com/hl-option-b.html Option C SL (almost finished SL, now working on HL) http://www.msjchem.com/sl-option-c.html Option C HL http://www.msjchem.com/hl-option-c.html
Last reply by IB`NOT`ez, -
Anyways.. What are your option material? I'm hopefully taking option B (Medicines and Drugs) and C (Human Biochemistry) alone. Anyone ever done both/one of them? What are yours and what do you think of them?!
Last reply by Award Winning Boss, -
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In this lab I had several problems: * Concentration of CuSO4 was 0.2 M. *No major changes in temperature. Min: 28 Max: 34 *Huge percentage error of 207.38% *We had to increase the amount of CuSO4 and Zn to be able to read the temperature because the thermometer couldn´t reach it. * We used an old polyestirene cup and a normal thermal cup's lid. *Lab instructions told me to use 25 ml of 1.0 M of CuSO4 and 6 grams of zinc, but I used 75ml of 0.2M of CuSO4 and 18 grams of zinc. *The graph I plotted with the data I got from the experiment is awful. Also, I was asked to trace a perpendicular line from when the zinc was added and a tangent line from the maximum point and using …
Last reply by anabelito234, -
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Hi, we have been asked to come up with a topic for our group IV i.a., i came up with the following but i'm unsure if its too simple for a whole written report Food Calorimetry, determining calories in certain samples of foods and comparing them to label seeing if it falls within the range and if its accurate. Thanks for any help!!!!
Last reply by AnnaHoffman, -
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Like both but can only choose 1. I’m not really sure how to decide. Ive already chosen chem but feel like physics is more suitable as I’m taking hl maths and also I do not like organic chem. from what I’ve heard both are equally challenging subjects. What made you decide to choose one over the other? Btw I’m not pursuing a science degree in the future thanks
Last reply by Gazuar, -
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I have a very neglectful teacher for chemistry and an even more neglectful IB coordinator. So what would happen is I would come up with a RQ he will the ones he doesn't like and after a few tries I find a RQ he likes then the next day I buy the materials for the lab 5 to 6 hours later he reveals that he doesn't like it anymore and I need need to find a new RQ and to do it over again. I am pretty sure this is natural if it happened once. However, he would keep doing this to me for a good 3 weeks maybe I am not just dedicated but I gave up after that. I wasted too much money on materials and too much time was wasted I can't keep up with my other classes. So I decided…
Last reply by The_Dude, -
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Halogenoalkanes can undergo SN1 and SN2 reactions with aqueous sodium hydroxide. Which halogenoalkane will react fastest with a 0.1 mol dm–3 solution of aqueous sodium hydroxide? A. 2-chloro-2-methylpropane B. 2-iodo-2-methylpropane C. 1-chlorobutane D. 1-iodobutane The answer is B but I'm unsure how. Thank you!
Last reply by CharliePalmer, -
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If I'm using a simulation for my physics ia, how do I do uncertainties? There are no uncertainties in the simulation.
Last reply by Anonymous1234567, -
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Please help me! I am supposed to design my chemistry IA, but I honestly have NO IDEA on how to even start. Chemistry is my worst subject and I have a lot of trouble in understanding it. I always try so hard on my IA's but I always end up making B's. I have to decide on one factor that affects the rate of a reaction to investigate in my design lab IA and this lab is supposed to be easily reproducible. Here's my IA guidelines: Aspect 1 includes: Formulating a focused problem/research question and identifies the relevant variables. Aspect 2: Designs a method for the effective control of the variables. Aspect 3: Develops a method that allows for the collection of suffic…
Last reply by Chemismykryptonite, -
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So this thread can be used by anyone who feels overwhelmed abt the upcoming exams…I am also a student like you all and i take HL chemistry…i got a 3 on my mock exam which means i have to study harder to raise my grade to a 5 if i want to get to UNI…so that bits abt me i am so stressed rn if anyone has any tips for the preparation of the last exam…please share some
Last reply by allydimmy-62, -
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I was thinking about doing my Chem SL IA on the decomposition of hydrogen peroxide catalyzed by catalase found in a potato. I was going to change the particle size of the potato and determine its effect on the rate of decomposition I am a bit concerned if the method I am using is okay. I asked my teacher if I could use a gas syringe to measure the gas produced, but they said the gas syringes they have are not great and have a lot of uncertainty. An alternative was to add soap to the hydrogen peroxide and measure the time it takes for the bubbles to reach a certain height. Or could I somehow use a eudiometer to measure gas produced? Is this an appropriate method?…
Last reply by nomzy98, -
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Okay so I am in HL Chem and I am worried my IA idea might be too simple or obvious. Basically I want to test if the temperature of water affects the rate of the Acid Base reaction between Sodium Bicarbonate and Citric Acid in bath bombs. I would make the bombs myself to standardize the amount of everything that goes in and test a bunch of different times in water at different temperatures. Then I time the reaction to see how long it takes in each different temperature of water. My one concern is that it seems a bit too obvious that the temperature will affect the rate and I worry that it's just to simplistic for an HL student. Some ideas I had to make it more complicated …
Last reply by AnnaCamach, -
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Does anyone a rough percentage of the question-share of topics in the IB chem exam? Or which are the most tested topics? Anything I should study extra hard for? Thank you!
Last reply by chaddeus, -
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I am doing chemistry at HL but my IA is on electrolysis and I've just been told by my teacher that it is SL and can't be done at HL. Then she told me it didn't matter. I'm really confused. Should my IA be on an HL topic area or can I do an SL topic? Will i lose marks if it is SL and I'm doing HL?
Last reply by Tobyd, -
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I currently have a textbook by John Green and Sadru Damji and its making chemistry HL Hell! I'm only halfway through year one but i'm going to fail with this book. Could someone please recommend another textbook that they find favorable. Any opinions on these two books: Chemistry for the IB Diploma by Christopher Talbot and Richard Harwood or Higher Level Chemistry (Pearson Baccalaureate)
Last reply by IBsciencewhiz, -
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I'm an IB student who's working on the chemistry and biology IAs right now, and I'm still struggling with choosing a good topic. I have an idea for chemistry, but it comes from one of the required practicals I did in school, and I'm not sure if that is discouraged by the IB. Is it fine to take a practical done in school and adapt it for the IAs? Please let me know what you think, any advice will surely help!
Last reply by Mary123, -
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Hey does anyone know how to get different pH levels of sulfuric acid? Right now I'm using a pH meter and adding drops of 1M sulfuric acid (but literally the pH drops so fast so its hard to get a nice range like 3, 4, 5, etc) , does anyone have any tips on what to do? Im trying to imitate acid rain and see how different concentrations of this effect my plants
Last reply by iwannapassyuh, -
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Hello, I am writing this because I'm not sure if this is a good idea for my IA or not. I want either measure the effect of caffeine on pepsin activity, or effect of temperature on pepsin activity (or maybe effect of temperature on the effectiveness of antacids in inhibiting pepsin activity?)
Last reply by faten, -
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I would like to do an IA on the effect of antacids on neutralizing stomach acid, using diluted HCl, but I've been told it's siding more towards Chemistry. Are there any ways that I could make this more of a biology related IA, and how can I do so? Someone told me to involve an enzyme, like pepsin, but I'm not sure of what to do with it. Thanks!
Last reply by nini124, -
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Hi So I'm just doing my chemistry IA and I'm trying to calculate my uncertainties and I was wondering if I need to use the unmeasured uncertainties from my experiment for a the final uncertainties. For example, adding the uncertainty of measuring a chemical from a measuring cylinder while the final answer is something weighed in grams. Would I need to include that and if so, how?
Last reply by am4lie, -
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Ok so the question asks, 'calculate the no. of moles of iron in 0.982g of Fe(NH4)2(SO4)2.XH2O its from a past IB exam paper. If possible, explain what to do instead of just stating the answer. Merci.
Last reply by Lilpeepforever, -
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Hello I am a DP student who does chemistry HL I've been dying trying to think of a good experiment for my IA but all I managed to come up with was testing temperature on the Iodine clock reaction but then I realised this experiment is too simple and has no real world application that I can personally link too so I need help to know weather if this is good enough for an HL chem IA
Last reply by faten, -
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How do I use a spectrophotometer to determine tannins in a substance? (this is for a practice IA topic)
Last reply by potato_papa55, -
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Hello everyone, I ran out of time for my Chemistry Internal Assessment and was advised to do the IA without any kind of experimentation. I would have to search data through the internet yet I don't know how to do it as I don't have any kind of experience in making this kind of work. If you could advise me as to what kind of topics I can look at or where I can find clear guidelines I would forever be in your debt:) Thank you.
Last reply by Jognsba, -
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Hi, I am on my sophomore year and have to choose my Ib subjects by September. I would like to study engineering but I am not sure if I should take chemistry in Ib or not. I am currently planning to take: Maths HL, Physics HL, Visual Arts HL, English SL, Spanish SL and business management SL. I am not sure if chemistry is required, and I don't like the course enough to take it on Ib. Should I take chemistry? I am planning to study civil/ mechanical engineering. Thank you.
Last reply by Jognsba, -
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I've been struggling with my chem ia topic - every idea I have turns out to be too hard to pursue with my current knowledge and skills or I just have no idea how to come up with an actual method to measure something. My teacher isn't too helpful either - she isn't too keen to give me any tips or help me develop my ideas into a valid research question. Lately, I've been thinking about investigating how does the presence of different metal ions affect the rate of hydrolysis of esters. Is it a good idea, should I take it seriously and look into it? And what method could I use?
Last reply by sahiba, -
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My Chemistry teacher has been very good about posting IA resources for us, so I thought that I'd share them here. Possible IA Chem Real Labs 1. Stoichiometry – investigating eggshell(Type of egg/Age of chicken) 2. Stoichiometry – investigating anti acid tablets 3. Kinetics – Effect of Conc/Type/Temp of acid on rate 4. Effect of Temp on Vapour Pressure 5. Effect of Acid/Ph on eggshell/teeth 6. Effect of Conc on E of a cell 7. Effect of Current/Time on electroplating of zinc on iron nails. 8. Effect of time on decomposition of Hydrogen peroxide 9. Effect of Temp on Conductivity of Water/solution 10. Enthalpy of combustion of alcohols 11. I…
Last reply by EllaMilo, -
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Hi everyone, I'm currently searching for chemistry ia ideas. My initial idea had to do with caffeine extraction from tea by titration, however I'm really confused about the method. I've mostly found procedures involving chloroform, which I will however not be able to use for my lab. I also came across a method that uses iodometric back titration, but there doesn't seem to be much info about it online... Does anyone have experience with this method, or has done their ia on a similar topic? I'm really interested in it but I'm concerned that it's way too complicated (i'm in chemistry sl and we haven't done any practicals during ib year 1 due to covid, so i'm looking for some…
Last reply by nv_xx, -
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Hey! I present my exams on November 2022, and I was wondering what good topics could there be for chemistry. I’d like redox reactions, for example the oxidative properties of a fruit or something like that. Also, maybe something related with acid deposition. Thanks! I really have no idea of what to do.
Last reply by asapyoon, -
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Hello everyone! My chemistry IA involves increasing temperature of a reaction in a closed system. I need to find out the concentration of the reactants while doing so, but in a real life experiment, it is impossible to constantly check for the concentration of the reactants while heating without affecting the reaction. So, I decided to go with a simulation, but can't find any website where I can perform my own experiment. Could you please suggest some?
Last reply by sanya_mishraaaaaaa, -
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My chemistry IA had to be a database one so I had quite a hard time to make one up but I found one off the internet and added one variable. My teacher accepted it but I think its too risky to have the same question off the internet and that its plagiarism. Should I scrap the whole thing?
Last reply by flowermemoo, -
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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 w…
Last reply by bigcauliflower, -
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I am doing a chem ia on how the brewing temperature will affect the caffeine content within tea. I have done my experiment and all but I am having a hard time calculating my errors. So basically I used solvent extraction method to extract caffeine from tea with chloroform and then evaporated it. At last I was left with crude caffeine so i used its mass and the molar mass of standard caffeine to find the amount in mols. To find the errors do I just need to use the uncertainty of molar mass(0.001g) and the mass of crude caffeine (0.002g)? To prepare the tea solutions I have used water and tea bags. To get rid of the tannins (compounds that could be extracted with caffeine a…
Last reply by artozprinter, -
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Hello everyone, I'm wondering how I would calculate the uncertainty of my findings for a lab report. I found the activation energy of the alka seltzer reaction in water (C₆H₈O₇＋3NaHCO₃ → 3H₂O＋3CO2＋Na3C6H5O7) The way I found it was to measure pressure change over time in a closed erlenmeyer flask, convert that to concentration (using ideal gas law), and take its inverse over time to graphically find the rate constant. Then, I took the natural log of the rate constant against the inverse of time (aka the Arrhenius equation) to give me Ea times r. I divided the slope of the graph by R to give me Ea. However, now I'm confused about where to begin with apparatus unce…
Last reply by plshelpibcraz, -
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Why is the answer not B?
Last reply by iLiveInAHut, -
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When 100 cm3 of 1.0 mol dm–3 HCl is mixed with 100 cm3 of 1.0 mol dm–3 NaOH, the temperature of the resulting solution increases by 5.0 °C. What will be the temperature change, in °C, when 50 cm3 of these two solutions are mixed? Can someone explain how to do this question ?
Last reply by ZAYED573, -
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Does anyone have chemistry p1 or p2 questions specific for a certain topic in chemistry? I mostly have past papers but as I have not yet studied all the chapters in chemistry, I have a hard time trying to answer to the questions that combine knowledge from multiple topics If someone wants, I can send 95 questions with specimen answers related to Energetics and Thermochemistry
Last reply by YourFriend, -
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I have just received a second extension on my chemistry IA. I have all my calculations down and uncertainties, the issue with my IA is that my experiment was terrible and I dug myself into a terrible hole which it looks like I can't get out of. My experiment was an acid base titration with 5 different types of vinegar (white, white wine, champagne, apple cider, rice wine), and my processed data is their pH values (the range is between pH 2.35 - pH 2.47 - not much variety and it concerns me). The vinegar did not have labels which specified the acid content in them, and I cannot simply calculate the acetic acid content of each vinegar because apple cider vinegar for example…
Last reply by ben_t23, -
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For my Chem IA, would it be a good idea to calculate calories in different cooking oils to find which is the "healthiest" option? I am doing HL, so need some HL part of the course. I thought this idea had personal engagement and would be pretty interesting to calculate.
Last reply by fer28, -
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Hey everyone, I am a Chemistry SL student and I have to come up with an idea or topic for my Chemistry IA. I'm really interested in forensics but haven't found much ideas of it in reagrds to an ib chem ia. I have an idea in mind which is " The effect of temperature of latent fingerprints". I was wondering if this is too much of a broad research queestion and how to implement chemistry fully into it. And also if anyone has any ideas or references that could possible help me? Desperately seeking your help, thank you!!
Last reply by _christybong, -
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I want to do my iA on aromatic compounds and I'm looking everywhere for a simulation programe that would help carry put the experiment. Anyone knows any simulations or how they work? I'm I supposed to know a specific software?
Last reply by Astrodan, -
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I am doing my IA on the effect of different washing methods on the number of bacteria colonies on the surface of a fruit. my method is composed of me visually counting the number of bacteria colonies. Therefore there is no direct uncertainty on my results other than human error. I don't know what to do is it bad that i don't have uncertainty calculations? will i lose a lot of marks? someone please help.
Last reply by aniz, -
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Would anyone mind guiding me in doing my experiment for the Chem IA. I am trying to find the effectiveness of different brands of liquid antacids. I have cabbage powder which I plan to mix with water for my indicator. I am using distilled white vinegar as my acid. I have three different brands of antacid Pepto Bismol, Mylanta, and Graviscon. I have all the equipment I need (I think). I have a buret, magnetic stirrer, 2 small beakers, and pH paper. I’m just not sure how to do the experiment. What do I start with? What type of titration will I do? What measurements should I keep track of? My end goal is to find which liquid antacid is the best at neutralizing a…
Last reply by Zane24212, -
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I have had a 3 in chem all year from August to now February and no progress seems to be happening, I find it harder to learn and be motivated w covid what do I do is a 3 really bad
Last reply by Tsarina, -
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Hi, I started doing my chemistry IA on the effect of temperature on buffering capacity. I added a pH 7 buffer to distilled water and titrated it with NaOH. I then measured the amount of NaOH taken to increase the pH of the water by a unit of 1. I tried this for temperatures between 5 and 80 degrees but there was no significant difference between the data obtained. This there any notable fault in my methodology? I have to finish gathering data for my IA within one week. Since I was going to discuss the effect of temperature on the equilibria of the buffer solution, I am in the process of finding another IA experiment in the same subject area. If you h…
Last reply by lkugh1bo7, -
Hey guys, I am a grade 11 IB HL Chem student and my teacher never gives us homework solutions to check our answers and he/she refuses to take up questions too when we ask him/her. My friends and I are quite stressed since we can never be sure whether our answers are correct or not. I was wondering is this an IB norm or is it just us?
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Last reply by Ibclown,
