Chemistry
For Chemistry Discussions
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Is the following a good topic for my SL chemistry IA? Content of citric acid in fresh orange juice vs bottled orange juice (by using titration)
Last reply by shellziess, -
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I am working on my science fair project which is observing how acid rain causes corrosion of rocks. I want to make an acid rain solution using distilled water and sulfuric acid. What is the ratio of the amount of sulfuric acid per milliliter of water to get a solution with pH of 4.0-4.3?
Last reply by kw0573, -
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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
Last reply by ohwonderf, -
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It's too late at night to email any of my teachers and I'm panicking right now. Recently something came up and I have to leave the country and miss the last week of school; As a result I won't be able to complete my Chemistry IA experiment to gather data for my write up before the start of summer. Can anyone tell me how big of a problem I have here? Am I going to be seriously behind if I'm only able to start my IA experiment in year 13? My teachers have been really vague on the importance of the IA deadlines so I'm not sure if they're flexible or rock solid. Of course this is probably heavily based on my school, but any information would be greatly appreciated.
Last reply by IB`NOT`ez, -
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Hello. I wanted to ask what the uncertainty would be for a titrated volume if I used the burette 2 times in one titration? So for the 50cm3 burette, with 0.08cm3 uncertainty for starting volume and 0.05cm3 uncertainty for any readings – would the uncertainty of 80cm3 of titrated burette solution have the uncertainty of 0.08+0.05+0.08+0.05cm3 ? Since I used it two times, refilled it two times, read it two times?
Last reply by kw0573, -
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So... I am really struggling with my IA experiment. I used a stupid experiment that basically included having test patches with coffee on them, and then I was to pour different percentage concentrations of vinegar on it. I was then going to see how the different concentrations of vinegar would remove the coffee stain, or rather, the effect that it would have on the different stains. I am varying the amount of acetic acid concentration in the videregar by the way. So...problem is that I want to show how the patches "lost their stains", and I need something else than my naked eye to prove this. The only solution that I have left now is to actually take a picture of the…
Last reply by dreamyslife, -
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Hey guys, I am an IB student thats taking his IB finals in May of 2018. My chemistry IA is coming up after this summer, and I am thinking about doing one on air pollution and the formation of air pollution. My chemistry teacher told me that it won't be practical, and that it is pretty hard to do. What are some ways that I can extend on this idea, or, how can I adopt this idea to another idea? Thanks!
Last reply by 18ericz, -
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I currently have a Chemistry IA topic, and I gave it at least 6 months before the due date given by my teacher. Six months later, she tells me that my IA topic is unsafe. During these six months, she could have told me. I don't want to work on another IA because I have already spent enough time working on his one, and early too. So I need to convince her. In this experiment, I want to analyze the combustion of different octane levels of fuel. This may sound dangerous, but I assure you; it is not. I am going to use 88 RON, 92 RON, and 95 RON gasoline, and feed them individually to a lawn mower engine. The variable I am going to analyze is the amount of …
Last reply by DatGameh, -
chemistry ia Chemistry IA Topic
by Guest A.D.- 0 replies
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Hey i need a chem ia topic suggestion or sample which will help me in deciding a topic... thank you in advance
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Hey guys, I'm doing a lab in my SL Chemistry class called the Heat of Reaction/ Hess's Law lab. Basically we used a polystyrene cup as our calorimeter, and performed three reactions. Calculations were made to determine molar enthalpy. The target reaction was reaction 3 (-54.3 kJ/mol) , and reaction 1 and 2 were used to calculate the molar enthalpy of the target reaction (-50.8 kJ/mol). We then compared the values. What are some limitations of this lab? I'm really stuck. Thanks in advance! (below I have posted the entire procedure) Pour 200 mL of water into a polystyrene cup and record the temperature. Measure out 4 grams of sodium hy…
Last reply by shellziess, -
CHEMISTRY IA
by 007- 0 replies
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Im planning to do my IA on "Presence of Insecticides and Pesticides in fruits and vegetables." Is this topic okay for Chemistry SL? Thanks
Last reply by 007, -
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I'm doing my chem IA on medicinal chemistry and I was going to do a database IA (because it's the fastest) on comparing structure-activity relationships of mild analgesics such as acetaminophen, ibuprofen, and aspirin. However, I'm encountering problems formulating a research question because I don't know how to incorporate quantitative data and graphs! I need help finding ways to incorporate quantitative data into my investigation ASAP!
Last reply by IB_taking_over, -
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Junior here. At this point in the semester (month away from exam) I have a low 4 in chemistry HL. How doable is bringing my chem mark up to a 6 by 2nd semester of grade 12
Last reply by Bil Ifan, -
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So I ended up getting a really bad mark on my chemistry design lab that brought my mark down by almost 20% (from an 84 to a 65). However, I feel like I didn't do as bad as my teacher graded it. I got a 7/24, but I had done the graphs and the research properly. I have all the components asked in the rubric. The question is, would my IA mark affect my overall IB mark? If so, can I have my lab being regraded by another teacher?
Last reply by IB`NOT`ez, -
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I am going to take Math and Physics at Higher level. I am aiming to study engineering in the future, mostly interested in Electronic Engineering. Do you guys think it is worth downgrading Chemistry HL to SL for Economics HL in order to relieve the stress of Math and Physics HL? Do you think Chemistry could be useful because of it's interrelation to other subjects.? From what I have heard, Economics has a paper 3 which could be beneficial mark wise. Economics in Higher level also has less additional topics compared to the extensions in Chemistry HL. I believe this choice could relieve stress. On the other hand, Chemistry HL is a science subject which gives m…
Last reply by captain teemo on duty, -
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Paper 3 tomorrow and I'm worried about section A. What will we get tested on?? Like obviously conceptual things where we needa apply our skills but do you think we'll get questions from Topic 11?Like NMR/IR stuff? Or topic 1 stuff??? I'm stressed.
Last reply by IB2017student, -
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HEY guys.. can someone please help me with this question, have spend almost 2 hours on it but cant figure it out. it's about aqueous electrolysis of CuSO4 At anode: h2so3 + h20 ---> so4^2- + 4H+ + 2e- (-0.17) Or H2O ----> 0.5O2 +2H2 +2e- (-1.23) Why does the second reaction occur at anode even thou the eletctrode potential for the first one is more positive?? (question says using graphite electrodes, does that has to do something with it?)
Last reply by kw0573, -
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What is the total number of atoms in 0.50 mol of 1,4-diaminobenzene, H2NC6H4NH2? A. 16.0 x 10^23 B. 48.0 x 10^23 C. 96.0 x 10^23 D. 192.0 x 10^23 When I work out the problem I keep getting 3.0E23 0.50 mol * (6.0E23/1 mol) = 3.0E23 Am I doing something wrong? I feel comfortable doing stoichiometry, but now this problem makes me doubt myself.
Last reply by kw0573, -
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I have been trying to review equilibrium through videos (that's how I learn), and I'm confused whether or not Ka is the same as Q? Is Ka just an American thing or internationally accepted?
Last reply by lolkeinthatsghey, -
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Hi guys, So the first chem exam is next week and i started preparing like 5 weeks ago, however i am really not doing well. I'm frustrated because i've literally studied everything over and over and have done practice questions yet i just can't grasp the chem theory. I score particularly badly in paper 1s for SL chem and i am at a loss as to what to do. I know that i know the general information but am stunted by questions that should be quite simple. Can anyone share a tip for practicing or understanding that could help me? I really need the help right now even though it's too late. My struggle is paper 1, i really need your help. Thanks a lot P.S…
Last reply by Elie, -
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Hi, Is mass spectrometry part of the chemistry SL 2017 curriculum? In other words, will this come up on the upcoming exam? If so, any relevant resources would help. Best regards, Iohannes
Last reply by Msj Chem, -
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I still have no idea if I can use a calculator for paper 1. If I can't, can you also give me tips how to calculate things quickly?
Last reply by IB_taking_over, -
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Hi this is a question on my chemistry test, it is a follow-up question after asking us to calculate the frequency of a 460nm photon, and was given a conversion table with colours, complementary colours, and frequency range. I don't get how does it relate to each other...
Last reply by inriya, -
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My teacher has NO clue what she is doing! (I really mean it, but it's her first year so it's expected.) For example, we found out about the IA a week before it was due > - < This made me question whether or not the lab reports we've been doing are going to be also included in those special documents we have to send off to IB. This makes me worry a lot because my teacher just skims over the lab report and see if it is just completed. She doesn't check the structure nor the content.
Last reply by alessandromasettipl, -
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I have a chem blog called Chem Is Try. It's both on the ChemNet of the RSC and Blogger (well, I should have put it on WordPress.) The blogger address is aquilinachemistry.blogspot.com. (Feel free to visit it if you like!) The first blog post about the chemistry set was actually recommended by the RSC (I think via ChemNet newsletter last year). The question is...I have not written one entry in the last 4 months. For each of the entry, I would like to think topics that are really compelling, interesting, and informative to write. The brainstorm part takes quite a long time. I have been busy with other chemistry/design/interdisciplinary activities and my academics…
Last reply by Aquilina, -
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I have 2 different ideas for my Chemistry IA experiment and am not sure which one is better. Both of them are on ocean acidification of coral reefs. As coral reefs are 95% calcium carbonate and so are seashells, I'm using seashells in my experiment. 1) My first experiment is on investigating effects of varying levels of concentration of carbon dioxide in water on seashells So I will be investigating different levels of carbon dioxide in the water (varying concentrations of carbonic acid) on seashells in distilled water so I'll be carrying out titration to find the neutralising point and apply that to ocean acidification. 2) My second experiment is investiga…
Last reply by Silvia Teow, -
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Hi everyone I really need help on this question!!!! I have a tok question on Chemistry. "to what extent is chemistry a separate language? what are the main differences between the language of chemistry and your mother tongue?" what's your opinion on this??? Thanksss!!:)
Last reply by tiffae, -
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Hi everyone, Basically I tried to do my chemistry IA experiments and the data I collected was the opposite to what the relationship should have been. I was measuring the CO2 absorption in different temperatures of water, and instead of absorption decreasing in higher temperatures, it increased. Does anyone know why this could have happened outside of simple experimental/methodical errors? I would also appreciate advice on what my next move can be seeing as it didn't work. Thanks!
Last reply by SC2Player, -
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Hi there! The first draft of my chemistry IA is due at the end of next week and I have been searching for topics for the past 3 weeks. I trialled 2 experiments; paper chromatography with henna leaves and investigating the effectiveness of antacids through pH meter titration and they both didn't turn out as planned... I don't particularly like titrations and I'm not very good with experiments so I did consider doing a database IA, but I'm struggling to find something to investigate. I am really struggling to find either a) an investigation that doesn't involve titration, b) materials can be accessible in NZ schools, c) a topic that someone in my class isn't already do…
Last reply by Mira, -
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From the November 2016 paper
Last reply by kw0573, -
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I have trouble recognizing the organic functional groups etc and what the molecule is classified as e.g ethers, esters and sometimes aldehydes and ketones. Is there a way to practice to get better without rote memorization?
Last reply by SC2Player, -
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I don't understand these P1 questions. Please help me understand them by giving some explanations. answers: 1. B - which equation should be used? I thought it was mol= vol/24 2. A - why is the denominator (0.5)^2? I thought it was C 3. C - I don't get these types of questions. + means a stronger oxidizing agent and - is strong reducing agent. Then shouldn't the most negative one, Fe2+, be the correct answer? 4. C - no idea about this... 5. D - how do you know... 6. A - I know it is optical, but how do we know if it is or is not geometric? Thank you very much. Your help will really help me.
Last reply by allthebest, -
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where can I find the answers for inthinking ch.10, 20 and option C? If anyone has it can you please pm me? It'll be a great help. Thanks in advance
Last reply by allthebest, -
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Wondering if anyone can answer the following question, and the explanation behind it, as I have trouble differentiating between isomers for cycloalkanes. Thank you!
Last reply by SC2Player, -
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pKw for water at 10^oC = 14.54. What is the pH of pure water at this temperature? a) 6.73 b) 7.00 c) 7.27 d) 7.54 The answer is c, I fully understand how to get to this answer, however I don't know how to do it without a calculator due to the difficulty of the arithmetic involved. Which is correct for a weak acid, HA, with concentration 0.01 mol dm^-3 at 298K? a) [H^+] < 1x10^-2 b) pH < 2 c) [OH^-] < 1x10^-12 d) pOH > 12 The answer is A, why is that? isn't the concentration of H^+ exactly 0.01 mol dm^-3 as stated in the question? why is it less. Another question I have is whether the mixing of differe…
Last reply by kw0573, -
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What is the major organic product formed from the reaction of (CH3)3CBr with concentrated ethanolic solution of KOH? A. (CH3)3COH B. (CH3)2CCH2 C. (CH3)2CO D. (CH3)2CHO I thought the answer was A because of the nucleophilic substitution reaction of tertiary halogenoalkane by SN1 mechanism. However, the markscheme says it's B Can anyone explain why the answer is B? Thanks in advance
Last reply by allthebest, -
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May someone please answer the question and explain what is meant by the transition state and how you got to the answer, I have looked for this in my book but can't seem to find anything about it. Thanks!
Last reply by kw0573, -
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Hi there, I am thinking about doing my chemistry IA on paper chromatography of black and red henna dye. However, would this be too simple for Higher Level?
Last reply by Mira, -
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Are Sn1 and Sn2 reactions necessary for Chemistry SL? Thanks in advance.
Last reply by Msj Chem, -
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First of all, when you have 2Na and you try to find the moles, do you just disregard the 2? Because the mols is 0.05 right? So 2NaOH also has 0.05mol. And i'm stuck lol
Last reply by kw0573, -
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Did someone who measure viscosity by the formula [2(ps-pl)ga2]/9v and is able to help me with some calculations, because data which I collected does not give the wanted result. I need an immediate help!!
Last reply by HappyIB:), -
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May anyone please answer these questions in detail? thank you! The answers are A and D, respectively.
Last reply by Msj Chem, -
- 4 replies
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The answer is A, can someone explain how you got to the answer and the relation between temperature and equilibrium using the given equation? It doesn't seem to be mentioned in my book.
Last reply by Scienuk, -
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For my chem IA, I am looking at determining solubility of CO2 at different temperatures, specifically in soft drinks. My method is basically placing a soft drink in cold and very cold water and measuring mass loss over a period of time once the can is opened. The mass loss will be the CO2 gas leaving the system, leaving some of the CO2 in the soft drink, reacting with water to form carbonic acid. Would this option be a viable option? I have a lot of theory behind it, such as energetics, equilibrium, le chat., and acid bases. Also, would it be good to use a literature value of the actual amount of CO2 put into these drinks, or an experimental value, as a compari…
Last reply by ibnewB, -
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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 potassi…
Last reply by kw0573, -
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I know I posted a thread with the same issue but I have a different IA idea now. The research question is Determining the effect of varying Potassium permanganate vii concentrations on the rate of reaction between potassium permanganate and hydrogen peroxide. I will be taking out potassium permanganate VII and putting water to increase concentration. Calculating the concentration I will drop hydrogen peroxide into the flask and observe the reactions.
Last reply by kw0573, -
- 2 replies
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Hi All, I'm in IB1 right now and would like to start working on my IA. I have come up with a topic but I'm not sure if it sounds interesting or if it can get me a high mark. The research question is Determining the effect of changes in concentration of orange juices on rate of reaction. I will use different plastic orange juice boxes and place them into different temperatures (Frozen, room temp, outside etc.) and measure the concentration before I put them in their allocated temperatures. Each 24H I will take them out and measure the concentration then calculate rate of reaction.
Last reply by IJustWanaPass, -
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I am trying to figure out what my IA experiment is going to be, I know I want to do something with voltaic cells. I was thinking that I could manipulate the charge of the ions used and see how the electricity generated changes but my teacher said that it wouldn't work very well and would result in a weak IA. I am struggling to figure out what else I could manipulate, so far I have been thinking that I could use various concentrations of the ions used or temperature at which the reaction occurs but it seems like I would have the same problem, too simplistic. Does anyone have any suggestions on what my manipulated variable could be? Could I maybe combine temperature and con…
Last reply by Gordon_P, -
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I have to finalize my chem IA topic by next week, and finding a good topic's been pretty frustrating... My teacher said a good IA's results shouldn't be easily predicted just by looking at the title, and he didn't like some topics that were too simple or too common. The ideas I'd suggested so far: Concentration of carbonic acid in soda water over time / rate of decomposition at various temperatures (seems kinda pointless...) Equilibrium of carbonic acid in water at different temperatures (link to ocean acidification? I didn't really think this through) The rate order of different acids on calcium carbonate (teacher said the acids would behave m…
Last reply by IB`NOT`ez, -
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what is the pressure , in pa, in a 100cm3 container containing 1.8g of steam at a temperature of 727 C?(R=8.31 JKmol) The key is (1.8)(8.31)(1000)/(18 * 10^-4) but I don'e understand that where is temperature..the formula is PV=nRT right? Also what is 1000 standard for and also 10 to the power of -4?
Last reply by kw0573,
