Hello David, I think you are right. The topic is essentially a good topic. Provided the topic enables investigating the influence that changing one variable has on another variable and all the other potential variables are kept constant then it is...
Sample 1: Genuine marked & moderated IAI've had students do this reaction for their IA regularly as it's fairly easy to get good data with an oxygen sensor. I often have them investigate a particular catalyst (eg. MnO2, KI, etc) and find activation energy. It seems it was more...
Sample 1: Genuine marked & moderated IAExcellent analysis. It's important that we have high expectations from the IB otherwise students start to lose faith in the whole system, especially when practicing with previous exam questions. We requested our marked scripts back this...
The subject report and errors in the exam papersHello Laura-Jane, If you are using zinc as the metal for one of the cells then any soluble zinc salt can be used especially if it is soluble enough to give a concentration of 1.0 mol dm-3. Zinc sulfate, zinc chloride and zinc acetate...
Voltaic cellsHi, is there a substitute for the zinc nitrate? Thanks
Voltaic cellsThanks for the quick reply! I agree that it can be pieced together by making links between Strong / weak definitions and existing knowledge on K. It was a good challenge!
MC test: R3.1 Strong and weak acids & basesAh, I see my confusion. Thank you for the quick response Geoffrey.
R3.4 Electron-pair sharing reactionsHello Kimberly, This page covers the common material for SL and HL for topic R3.4.Nucleophiles are covered in R3.4.1 and in R3.4.2 where a simple mechanism for nucleophilic substitution is shown and where it clearly states that "Further...
R3.4 Electron-pair sharing reactionsHello Matthew, Probably a lot of teachers would complain if questions similar to Questions 7 and 8 appeared on an SL Paper 1 Section A exam as Ka and pKa etc. are AHL material. However R3.1.6 states that "Strong...
MC test: R3.1 Strong and weak acids & bases
David
Hey I noticed you guys added some AI scraping safe guards. I do copy paste these MCQs into our local platform because of cheating issues that I have previously stated when assigning them directly in your platform. Is there a non altered version maybe...
MC test: S3.1 Periodic table (1) - classification of elements