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Found 593 results

  1. Hi!! This is my second year of IB and in order to study ESS more efficiently, I made a summary of the whole book. Let me know if you want it
  2. I have to do a IA on the germination of seeds. I have my independent variable which is salinity. I am looking at it effect on the time it takes for a seed to germinate. I have a few questions, What is a good range of concentrations? How much of the concentration should I add? What is the best way to get my concentration? Should I add the concentration to the soil and add the salinity of the soil on top, or change the salinity of the soil to a fixed point? E.g. add 1% to soil or make the soil have 1% salinity. All help would be great! Thanks!
  3. Hello, we did an experiment of heat of neutralization. The objective is to calculate the molar heat of neutralization we are using calorimeter to determine the heat transferred and hence the heat of neutralization, DeltaH ( rxn) we have 2.00M NAOH and 2.00M HCL . and collected 25 mL of each solution. My question here is how do you calculate the above? I need a gerneal sense of idea of what to do, and it's due tomorrow. I'm keeping my cool and calm to not freak out and so far it is working here with you people. You guys are very helpful. I also want to know for the calculations part, how do you calculate the mass and temperature if we are using 3 different trials with 13 different temperature points? I don't know if you had any similar work to this, butI would like to know. Any help is gladly appreciated, thank you. ,
  4. So i'm thinking about my IA Topic for bio and my teacher recommends doing something that interests me. The only thing that comes to mind is the Miller Urey experiment and the topic of Abiogenesis. I'm wondering if there is anything I can do surrounding the experiment or abiogenesis.
  5. Hey! A quick little post to kindly ask if any of y'all could fill out this form for my data collection for my Biology IA. All you have to do is complete a small online colour vision test and then add your result. Thank you ahead of time for the help! https://docs.google.com/forms/d/e/1FAIpQLSfxh562qoHj7CO0XPgMwOVFrkjR1ZvDGwMublGAkQ3opAGFYw/viewform?usp=sf_link
  6. Hello! I think you might be familiar with the Briggs-Rauscher reaction, where you mix 3 solutions and then they do oscillate between colorless-yellow-dark blue for a couple of minutes. I thought this kind of reaction would be quite useful for measuring the effects of temperature over the duration of the oscillations, because we were supposed to investigate a factor that might had an effect over kinetics. Right after you mix the solutions, they turn into a yellow color, then blue, clear, yellow, blue... So I decided to measure the time it takes for the solution to undergo the cycle blue-clear-yellow, and I restarted the chronometer the moment the solution turned into blue again. So, let's say that for 20°C, I got the next data for the duration of one cycle: 13.09, 12.68, 12.15, 11.77, 11.5 and so on, averaging 12.24 seconds. My teacher said it was ok to calculate the rate of reaction only with the "general" reaction that acounts for one oscillation, that is to be said: IO3- + 2 H2O2 + CH2(CO2H)2 + H+ --> ICH(CO2H)2 + 2 O2 + 3 H2O If I know that the nominal concentrations of the reactants where: 0.050M for CH2(CO2H)2 0.067M IO3- 0.038M H2SO4 1.3M H2O2 0.0067M MN2+ Can I just assume that the overall rate of reaction was 1/(12.24) = 0.08170? I wasn't told until a few days ago we were supposed to calculate rates of reaction (I thought comparing just the seconds would be more than enough), and I truly don't know how to calculate them. Could you please help me? Thank you in advance,
  7. Hello fellow IB students, I am currently writing my Biology Internal Assessment Lab-design and I am struggling to determine the controlled variables in my experiment. I am writing about the effect of different temperatures on the ripening process of Bananas. (the ripening process in Bananas is controlled by different enzymes). Now my question is what would be the controlled variables in this experiment? Thank you for your help!
  8. Does the IA topic "To study the changes in the iodine value of edible oils such as olive oil, flax seed oil, coconut oil, canola oil and rice bran oil on subjecting the il to heating and reheating at various temperatures." make good sense. I'm trying to link iodine value to nutritional value. Would appreciate any help in putting this together. I'm confused because they now say saturated fat such as coconut oil is better for health and it has a low iodine value. They say higher the iodine value, higher the unsaturation and better for health...so a little direction would help in streamlining the experiment. Thanks
  9. I think I have an idea of what I want to do but I reckon it is too simple, can I please have some advice- I am thinking of changing the concentration of a ligand (not too sure which one) and measure the absorption, or maybe do this with one or two other ligands. Then I will sketch a graph and use the Beer-Lambert law to determine the value of eb. Please let me know if it is bad or not, I am kind of struggling.
  10. I was considering doing my IA about tea (because I'm obsessed with it heh). One idea that I have is measuring the effect of water temperature on the caffeine content of black tea. Considering I'd have to measure the caffeine content at different temperature intervals, and also take multiple trials, is this far too complex? And is extracting caffeine itself a complex procedure for an SL Chem IA? merci merci merci for any help Also, any other suggestions would be highly appreciated.
  11. My IA is to titrate the bases of different medications with the methanoic acid produced by bee stings; however, I am not finding any bee sting medications that have bases as their active ingredients, so I don't know what to do. Can antacids treat bee stings? Also, will I be at a disadvantage for having such a simple topic? Thank you.
  12. hey guys, i am actually quite desperate to find an idea for my IA. i have to find the idea throughout the summer but still i find it very hard because i am new to this IB system it is quite hard. please help me out with some proposals.and to top it all the teacher is really on my case and is pressuring me a lot. he wants something different and original. i would like ideas on genetics and heredity but anything else would do. and plz do explain also how i can carry out that experiment. thx
  13. I am calculating for the vitamin C concentration of different fruits and using the formula = Molar mass of vitamin c x concentration of DCPIP x volume of DCPIP used. I am confused on how to search for the uncertainty value. Can someone please help me???? Thank you very much!
  14. Hello, I have to conduct an experiment for my Biology IA and I was thinking it should be about Caffeine. I am a Caffeine intolerant and I would want to make some experiment of "how to reset caffeine tolerance" and to see if its possible. Perhaps I could measure my heart/ pulse rate for 3-4 days and see if there is any difference. Now I really need to now if this idea would work for the Biology IA and I would really appreciate if any of you could suggest how I should write the research question for this experiment in this case. Now first of all, can I do this if I have human consent form ( for myself or for other humans)? Or is there a problem with using this on humans? The thing is I have to conduct this experiment on my own, so please if you have any other suggestions or ideas that I could possible do without the help of an actual Lab, I would truly be thankful for it. (research questions about any topic in human physiology maybe? ) I am an SL Biology student by the way.
  15. Hello, If my biology IA data has a linearly decreasing graph but my statistical test shows the data is insignificant, is my IA wasted?
  16. Hello people of IB Survival, I desperately need your help with brainstorming an idea for my Physics IA. I was thinking about doing an experiment on the affect of the angle made by a rooftop (which has crushed ice on it), on the range that the crushed ice covers - basically how further away it falls from the edge of the rooftop. This applies to real life since ice slipping off rooftops is an actual problem in countries that have those heavy snow fall days. But, I believe that we are meant to expand on the syllabus for the IA... and hence I think this RQ and this investigation would be too simple. Could I do this as my IA? Any suggestions would be appreciated x
  17. Guest

    Empirical formula lab

    When processing data, which values should I calculate the average from? Masses or moles of Mg and O, or ratio? Help!!
  18. Hey guys, so I am doing my Chemistry IA on enthalpy changes of alcohol.. and so I was like half done my experiment (collected data) when I came across an IA topic researching exactly what I am researching, like my introduction, background info are different but our methodology to carry out the experiment is the same and data processing method is the same.... I was wondering is it okay to carry on? I still have my own original data, original background information, original introduction...its just our method to carry out the experiment and the way to find out the calculations is the same....... shall I carry on with my IA? please do let me know if you have any input on this, thanks.
  19. So I have this idea for my chemistry IA that I'm not sure of. I want to compare and contrast the effect of the different ratio between baking soda and acid vs. the amount of baking powder on the height the cake after baking. Baking powder is a mixture of baking soda and another acid that reacts when mixed with wet ingredient; it is used to make a cake "fluffy." I want to see if baking soda + acid will have the same effect as baking powder and how different amount of it will affect how much the cake rises. Possible variables: Independent- the ratio between baking soda and an acid + amount of baking powder (the total mass of baking powder and acid will be constant, and the mass of baking powder will change) Dependent- The height of the cake after baking Control: size of the mold, the amount of ingredients for the cake (flour, water, oil, etc.), baking temperature & time, amount of batter before baking, type of acid, type of baking powder, type of baking soda. The problem with this idea is that there are too many variables that can influence the result of the experiment. For example, how it is mixed, placement in the oven, spread of the batter etc. Will this be a good topic to do? Is there any way for me to control these variables? Or change some aspect of it to make it more controllable?
  20. Hi, I'm supposed to come up with a rough proposal of the chem IA. I've thought some and as I need to connect this to myself, I tried to something Korean. So I thought of measuring Vitamin C content in kimchi and its change according to the storage period of kimchi, and I'm not sure if this suits an SL IA. I also haven't learned oxidation and redox things yet, so would it be hard for me to do this without any pre knowledge? Thank you for your help
  21. Here is a website our bio teacher gave us, after seeing the amount of idea requests, I thought it might be an idea to share it. It has a list of practicals, most of which can be used for an IB bio lab report. There are also some documents such as examples, and consent sheets. http://www.nuffieldfoundation.org/practical-biology/topics
  22. Thatguy123

    IA Help

    Hi, so I'm not sure about my research question. I've been told that I need to be extremely specific and that the reader should know everything about my experiment after reading my research question. When I tried framing it, I saw that it was too long, but my teacher said it was okay. I'm really confused, because I've never seen such a long research question before. It is: What is the effect of different sugar concentrations (0.8M, 0.9M, 1.0M, 1.1M, 1.2M, 1.3M, 1.4M of 1:1 glucose/fructose solution) on the percent of sugar fermented by measuring the amount of ethanol when 1.00 ± 0.01g of yeast is added to 10.0 ± 0.1ml of sugar solution, by back titration with potassium dichromate, potassium iodide and sodium thiosulfate? Please advise me on how I can improve it. Thanks
  23. Hello, My individual investigation for biology is due next week. My topic was quickly approved by my teacher, but I missed the optional draft due date due to the fact that I was having trouble processing my data. My lab is about exercise physiology, and more specifically, the effect of resting time during running on muscle fatigue, meausred by how long it took test subjects to run a lap around a track after resting for different amounts of times between trials. When researching my topic, I found that a lot of what I was testing was outside of the basic ATP cellular respiration taught in IB bio SL. In my lab background info, I talk about ATP creation in muscles, which has to do with creatine phosphate, etc. So after all that rambling my question is, is this okay?? I'm freaking out cause my teacher has not even seen my report and will not look at it until its handed in because I missed the optional draft due date If anyone would also be willing to look at my lab, that'd also be great Thanks!
  24. Does anyone know any good Nervous system labs?! Or does anyone where to find some?
  25. Ok so my bio ia topic is about how temperature affects whether or not a enzyme denatures and causes my jello to become solid.... what do i do for my processed data........ and my calculations and stuff... plz help idk what to do and this ia is due like tmr so plzzzz help thank u!!!!
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