Chemistry
For Chemistry Discussions
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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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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 Maggie_Dora, -
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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, -
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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).
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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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I was recently doing some practice problems for my IB chemistry SL test and ran across this problem. "A 2.450 g sample of a mixture of NaCl and CaCl2 was dissolved in distilled water. The chloride solution was treated with excess AgNO3 (aq) solution. The precipitated AgCl (s) was collected, washed, and dried. The mass of the dried AgCl was 6.127 g. Calculate percent by mass of the NaCl and CaCl2 in the original mixture." (2 marks) AgCl has a molar mass of 143.45 g/mol, so I calculated that the amount of Cl in the sample was 6.127*(35.45/143.35) = 1.515 g Cl This means that together, there has to be (2.450 - 1.515) = .935 g of Na and Ca combined. At this poi…
Last reply by TimHortons, -
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Hello, I want to do an experiment relating the properties of a transition metal complex to the wavelength of light that the complex absorbs, but I can't seem to find any data on the wavelength of light absorbed by different complexes. Are there any databases that contain this information or information related to the absorption spectrum of transition metal complexes?
Last reply by tnoqj, -
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Hello, I'm doing my chemistry IA on paper chromatography of different colours of leaves. I really would appreciate a sample IA about chromatography that I can get the structure from. can you please share with me anything that might help? Thank you very much.
Last reply by j20, -
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Hi, For my Chem HL IA, I want to investigate how the different ligands in transition metal complexes affect the color of its compounds. I plan to use software like ChemSketch and Molview to draw the structures of transition metal complexes, but I can't find any tools in the software that I can use to calculate the energy released from the splitting of d-orbitals. Is there any website or application that I can use to calculate this?
Last reply by tnoqj, -
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I'm about to do my chemistry IA experiment on "The effect of temperature on the electrical conductivity of electrolyte drink(Gatorade)". However, my concern is as an HL chemistry student, I feel like the experiment is too simple and not much chemistry concepts are included. I heard that the marking criteria are same for SL and HL, but still, I'm just worried
Last reply by yoouikd, -
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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 Lollamogg, -
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How could the metal charge or ligand charge of a transition metal be connected to its absorbance of light / the wavelength of light it absorbs. I am trying to figure out the connection between this for my IA and im looking for some help to get started. I need to set up an experiment but before that I want to try to understand the question. I understand each topic separately I just don't see the link.
Last reply by Sakulss, -
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Due to covid-19 we were told that we should make an IA using only databases. The thing is that so far I have only seen IA topics about enthalpy and I havent studied that yet. Do you have any other ideas?
Last reply by ChocolateAndVanilla, -
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How good is this IA topic? "Investigating the effect of increasing concentration on the rate of reaction between sulfuric/hydrochloric acid and calcium carbonate." Are there any possible improvements to this topic? Like is this possible to do? If not, what are some changes I could make?
Last reply by sarahaction, -
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I've got a standard electrolysis IA, my dependent variable is obviously the deposit of the ion on the other electrode, but my independent variable is surface area. I've had some troubles with coming up with a way to test this, but I've concluded the the best way would be to cover up some parts of the electrode with waterproof tape. What uncertainties may be present? How could a certain amount of waterproof tape placed onto the electrode to test surface disrupt the electrolysis?
Last reply by derpyhero, -
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Is this a good topic? If not, how can I fix it? How does the mass of x antacid (in g) affect the volume of HCl (in L) neutralized through back titration? By the way, would I need to standardize my reactants? Thanks
Last reply by abs123, -
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Hey everyone, Hope you are having a good day. Some of you may have known me from past years. I have already made chemistry app two years ago. That app got a lot of attention and many people gave good advises on how to make it better. I put them all together and made new version of the app. Now i am happy to announce new updated app Chemistry for IB for high school students. App has almost everything students need including dictionary for people to search specific terminology and quizzes for every chapter with explanations. Apple Store link: https://apps.apple.com/us/app/id1518723748 Google Play link: https://play.google.com/store/apps/details?id=samir.…
Last reply by SamirAliyev, -
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Consider the following information. Compound C6H6(l) CO2(g) H2O(l) ∆HfӨ / kJ mol–1 +49 +394 –286 C6H6(l) + 7.5O2(g) à 6CO2(g) + H2O(l) Which expression gives the correct value of the standard enthalpy change of combustion for benzene (l), in kJ mol–1? A. 12(-394) + (-286) - 2(49) B. 12(394) + 6(286) - 2(- 49) C. 6(-394) + 3(-286) - (- 49) D. 6(394) + 3(286) - (- 49) …
Last reply by fafamehr, -
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My chem IA is due soon and I have missed all my lab experiment days. I need help designing a lab that I can preform and gather data at home on my own. My teacher said my last topic was too complicated and I needed a new one. Please help me.
Last reply by IBchemistry, -
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I need help on improving my chemistry IA question: How does the concentration of ethanoic acid differ in different types of vinegar? my teacher says its far too simple. Thank you!
Last reply by IBchemistry, -
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Hello I'm a new DP 1 student and I started looking for ideas for my EE. I decided to purse chemistry as my subject and I have a solid topic in mind, but it's not wide enough. I'm going to investigate differents cuts of meat of different ages and I'll compare the values of protein and fats in each. What can I do else? And how can I make this a proper topic? What experiments can I execute? If you're not allowed to help me, just tell me how I can find the experiment needed... Thank you in advance.
Last reply by IBchemistry, -
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soooo apparently my chem ia draft is due in 2 DAYS and my school is closed temporarily because of covid-19 (i'm in the US) so i'm unable to do my previous idea, which was experiment-based considering the time i have, i need a quick and fairly simple database topic since i won't be have any lab equipment to use during this time. any ideas????? i'm having trouble finding good database topics it also doesn't have to be something crazy good or complex because i'm planning on taking ESS next year anyway to replace this test grade, i just basically need a topic that'll let me just finish this and get it out of the way. thanks!!!!!!!
Last reply by IBchemistry, -
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After welllll past 24 hours of brainstorming, I have nothing to show for it. Despite my ideas being somewhat creative and interesting, they are deemed unworthy by my holy chem teacher. It seems like no matter what I do I can't either measure or even investigate the topic. Cab anyone please help me?
Last reply by IBchemistry, -
Chemistry IA HELP
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Hi, I need urgent help with me chemistry IA. I have searched for months now, researching about different topics and looking for inspiration on about every website there is on chem ias but can't seem to find/come up with anything! Can someone please help? Thanks
Last reply by IBchemistry, -
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For IB students who need immediate online support with IB chemistry whether IA, EE, any chemistry topic; this is the best trending android app for IB DP/MYP chemistry students to connect with the best experienced IB chemistry tutors available 24/7 Download links http://app.appsgeyser.com/10914746/Chemistry Tutor https://gofile.io/d/EaYKNb
Last reply by IBchemistry, -
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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!
Last reply by Beearee, -
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Questions-on-measuring-energy-changes.pdf please help!!!!!!!!!!!
Last reply by inthinking, -
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I need to find the uncertainty of pH, but I dont really understand how to do so. Some help would really be appreciated
Last reply by IB_bio, -
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3.0 dm3 of sulfur dioxide reacts with 1.5 dm3 of oxygen, under suitable conditions, according to the equation below. 2SO2(g) + O2(g) → 2SO3(g) What is the maximum volume of sulfur trioxide that can be formed in the above reaction? [The volumes of the gases are measured at the same temperature and pressure.] a) 6.0 dm3 b) 4.5 dm3 c) 3.0 dm3 d) 1.5 dm3
Last reply by ily, -
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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…
Last reply by Lola234364, -
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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 potatohead, -
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Hi, so my topic for the chem IA is current "What is the effect of the iodine numbers in different oils and fats on the properties of soap they are made into?". I am finding the iodine numbers of grape seed oil, sunflower oil, lard, butter and olive oil and comparing these values to the state of matter that the soaps made out of these oils are (which I am finding from an online database). In that, with talk about unsaturation I can only find a connect to how soft or hard the soap will be from my previous knowledge in IB bio/ the biochemistry part of the chem textbook, nothing on sensitive skin or effectiveness of soap which is what I really wanted to talk about. Is this go…
Last reply by Maggie_Dora, -
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I'm sure that by now you've all read my previous post about my YouTube channel. https://www.youtube.com/channel/UC8lJSSlRyIBs8pYhQBnCOIA I've now made a website that features all my videos in one easy to access resource. http://www.msjchem.com/ There are videos for complete old syllabus (last exams 2015) and I'm in the process of making new videos for the new syllabus (first exams 2016). Also videos for option B (SL and HL), option E (SL and HL) and option F (SL only). Perfect for the upcoming November exams!
Last reply by sarahaction, -
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Hi again. for my chemistry ia im very interested in doing catalytic decomposition of hydrogen peroxide with different catalysts but my teacher said that that rate of reaction is too hard to measure. however i read up on some similar past ia examples and they all managed to get a good score. so i dont understand why she said it couldnt be done. please if there is an efficient way to collect data on the rate of decomposition of catalytic decomposition of hydrogen peroxide, give me some ideas and feedback. Thank you!
Last reply by sarahaction, -
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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!
Last reply by sarahaction, -
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Hi everyone, I just picked my Chemistry IA topic which is the effect of pH on water absorbing properties of hydrogel. Can someone give me suggestions on how to design the experiment? Ideas on how to measure the swelling rate or how to control the pH? My main problem is not knowing how to control the pH since I do not think I can soak hydrogel in solutions of different pH as they would soak up the water in solution too. Lastly, does anyone know where to buy commercial hydrogel as I can't seem to find any online? Or should I just settle for any hydrogel I can get my hands on? Thanks!
Last reply by HenryFrank, -
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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.
Last reply by rraval10, -
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I want to analyze how (storage) temperature affects the pH of orange juice. My teacher told me to narrow it down to a specific chemical found in orange juice so i was thinking citric acid. unless vitamin c would be better? but i was thinking to just make citric acid solutions by myself with the crystals. I’ve heard mixed emotions about this topic; some that it’s too basic and others that it’s good. someone told me that it’s too basic because “any fifth grader could measure pH” but it does require calculations. not sure of which yet bc I just got introduced to the IA.. any ideas on what i’d need to calculate? and if it’s a good topic? i need to have it approved by friday.…
Last reply by d3mb, -
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Hey, I am planning to do my Chem IA on temperature having an influence on the amount of iron extracted from soybeans. Is there a good method to extract iron from soybeans? I was planning to use strong magnet to pull iron out of the soybeans but it seems very unprofessional. Thanks.
Last reply by Jason1211, -
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Hello! I'm staring IB in a month and was wondering what to study for chemistry HL. In myp nothing was really explained, and I forgot most of whatever had been taught anyways.. practical report writing isn't too good either (average 5 in myp). I have started revising previous textbooks, but not sure if it is actually beneficial. Any advice would be greatly appreciated, thanks !
Last reply by ryushii, -
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Hi, for a lab project, I'm doing a simple titration of aspirin. Question is: What is effect of different mass of aspirin pills on the purity of the tablet? I bought some aspirin from the store (low dose, regular, extra strong) and they all have different masses. Low dose is lightest, high dose is heaviest, obviously. The mass (grams) is not listed on the package, so I have to actually weigh it myself and record it. How would I put that in a raw data table? Would the conditions be listed as low dose, reg, high dose, or just listed by the mass (g) as measured? Also, for each trial of the conditions, would I have to weigh the tablet again? Thanks guys!
Last reply by hlsciencenerd, -
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Hi guys, I am struggling with the evaluation part of my Chemistry IA. I had an acid base titration as my experiment with HCl and NaOH. I had HCl in a conical flask and I was slowly adding NaOH with a burette. But sometimes I "overshooted" the NaOH, where I ended up pouring in too much NaOH than necessary. I was wondering if this is a random error or systematic error? I did get better with being more accurate with how much NaOH I added, so it's definitely not consistent how much I "overshooted". Thats why I thought it would be a random error, but idk anymore.
Last reply by indimpi, -
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Hi everybody I am on my summer holiday right now and I have pretty much written my whole IA up to the results section but i just realized i am not really measuring anything... My idea was to extract anthocyanin from blueberries and then titrate it with quinine (tonic water) at different temperatures to see the change in color. My idea came from my aunty who makes colour changing gin when tonic is added. As I researched i found that it is the anthocyanin in the plant that reacts with the more basic tonic water and so pH changes therefore the colour changes too. I would apply the conclusion of what temperature reacts the fastest to cocktail making. As you can tell i h…
Last reply by Emmvanschouwen, -
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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
Last reply by nishee, -
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Hi I need help in choosing another chem IA. This is because my last chem IA idea did not work (How does changing the concentration of water using sodium chloride affect the enthalpy change of hydration copper (II) sulfate?). This is a shame as I feel that the way I wrote this chem IA was really good. Here are some ideas that I have come up with/found and I was wondering which ones are suitable to get me a high 6/7. Use different acids to see which is most effective at catalyzing the esterification of propanoic acid Effect of temperature on enzyme activity. Monitor the rate at which amylase breaks down starch into maltose at various temperatur…
Last reply by Enterbot3, -
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Hi there, I'm really struggling with topic 1 stoichiometry and I really need help! Will you please help me with the following 3 questions? 1. 5.0dm3 of 2.00mol dm-3 sodium carbonate solution, Na2CO3 (aq)was added to a volumetric flask and the volume was made up to 500 cm3 with water. What is the concentration in mol dm-3, of the solution? 2. How many grams of sodium azide, are needed to produce 68.1dm3 of N2 (g) at STP? Molar V at STP = 22.7 dm 3 mol-1 ; Mr(NaN3) = 65.0 2NaN3 (s) → 3N2 (g) + 2Na (s) 3. 2.478g of white phosphorous was used to make phosphine according to the equation: …
Last reply by kw0573, -
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Hello, I am trying to complete a chemistry database and have been trying to look for a Chem topic for 4 weeks now. I missed the rough draft due date since I've been trying to search for a good interesting topic for so long when I finally came to this. Is there a correlation between bond angles and reactivity of a molecule? Unfortunately, I haven't been able to get much information out of this yet. Is there a correlation? If not, I could change it so it's "effect of bond angles on boiling point" or something like that. What do you think?
Last reply by kw0573, -
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Hello, I'm a grade 11 IB student, and i need help finalizing my IA topic. I have my brief layout planned out. I am trying to find out the time we need to brush minimum to get clean healthy teeth. As a substitute for organic toothpaste, I'm using sodium bicarbonate, and then to create a similar reaction like we touch the brush to out mouth, I'm planning to titrate it a fruit juice and then trying to neutralize it, although I don' know if it makes sense. The indepent variable will be the time exposure of the titration of both, and dependent variable will be the effectiveness of the neutralization, although im trying to figure out how to do that. Can anyone pleas…
Last reply by ib_practicer, -
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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!
Last reply by mads1171,
