Hello Dioni,Thank you for your kind comments - I'm glad you are finding the site helpful.You raise an excellent point and I owe you an apology. Your comments refers to question 3 on the task slide (number 9 in the gallery) which asks you to...
S2.2 (AHL) The covalent model (1)Good afternoon, Thank you very much for sharing the material. This is my first year teaching the IB programme, and I truly find the resources you provide to be of very high quality and extremely helpful. I would like to ask a question...
S2.2 (AHL) The covalent model (1)Hello Alexandra,This was in Question 1 (c) on the N2025 TZ1 Paper 1 (section B). As you can see from the image in the blog above, there were actually three different errors associated with this diagram which was supposed to be representing a section...
The subject report and errors in the exam papersThere was also a scale error on the burette that needed to be read - one of the diagrams the scale was divided into 4 parts, not 5.
The subject report and errors in the exam papersThank you for the clarification, much appreciated!
S2.2 (AHL) The covalent model (1)Hello Mona,If resonance occurs then all the C-C bonds are identical so only one compound of 1,2-dichlorbenzene can exist. If there is no resonance, then 1,2-dichlorobenzene can exist in two isomeric forms. One would have a single bond between...
S2.2 (AHL) The covalent model (1)Hello Geoffry and Paul, I did not get the second point in the chemical evidence of resonance in Benzene on Slide 2. Could you please clarify it?
S2.2 (AHL) The covalent model (1)I also noticed a few mistakes on the N25 paper. The incorrect use of Mr for molar mass was one of them, but also using a theta symbol instead of the plimsoll symbol (for standard conditions). And there was one question that assumed SL students...
The subject report and errors in the exam papersHello again Harprit, I afraid I can't really speak with any authority on what the IB will come up with in an exam these days as they have made several 'strange' questions recently (see my
R3.2 (AHL) Electrochemical cells
Lucy
Hi Geoff, hope you are well! When I click the link above to "data response question 4" it says the page is unfound - I wonder whether this could be found again? Thank you! Lucy
S2.2 (AHL) The covalent model (1)