Hi Lydia, Unfortunately the IB have not yet published any separate guidance in chemistry for the new chemistry EEs. I have put a link to where it should be in my resources...
SupervisorThanks Lauren and Rafael, Qu.19 being a repeat of Qu.14 was caused when I moved the couple of questions which are not on the syllabus to the end and deleted the wrong one in the process. I replaced Qu.14 with the original question now. The IB has...
Quiz: Can you speak Chemistry?I am looking at May 2025 Paper 2 TZ3 Question 3(b). The question asks students to sketch the concentration of nitrogen versus time after a small amount has been added at equilibrium. I would like to know your thoughts on the difficulty...
The subject report and errors in the exam papersI am looking at May 2025 Paper 1A TZ2 Question 22. The question says: "Which value indicates an equilibrium reaction?" I am having some trouble arriving at the correct answer of B (ΔG = 0). I think we can easily discard C and D as...
The subject report and errors in the exam papersThanks Geoff, that was amusing. Q9 is tricky especially after seeing option B in Q6. It would be pretty unconventional to see a molecule represented with a combination of skeletal parts and explicit carbons, like in Q9.
Quiz: Can you speak Chemistry?Hello! Is there a subject specific ee guide in chemistry (a separate document) or everything given in the same document Extended Essay Guide? I am trying to find the assessed extended essays in chemistry in "Assessed student work"...
SupervisorThanks Geoff! Interesting questions. Q14 and 19 are the same though.
Quiz: Can you speak Chemistry?Hi! I assumed giving access to the whole page would do that. Thanks!
HL Practice ('mock') papers and questionsHi Chloe, It does not appear on the new syllabus but I still think it is useful when discussing, for example, the structure and bonding in ozone etc. As well as in the gallery on this page I have referred to it a few times elsewhere on this website...
S2.2 (AHL) The covalent model (1)
Geoffrey
Site authorHi Austin,I think when you teach equilibrium it is worth considering the effect of volume changes on the concentrations of reactants and products as the equilibrium is established and their final concentrations. The classic example of this, which...
The subject report and errors in the exam papers