Thank you. The temperature does rise 2-3 degrees beyond the desired temp. So, is it valid to do an average?
R2.2 (AHL) Activation energyHello, This is electrolysis of water with H2SO4 in a Hoffmann apparatus. Is there any theory/reseach paper that supports why the graph of rate of electrolyis must be directly proportional to the concentration of H2SO4?
R3.2 Electrochemical cellsHi Geoffrey, Thank you so much for your reply and clarifications. I will make sure to follow the syllabus. Martha
S3.2 Functional groups - classification of organic compoundsHi Martha,What is important for the IB is not how a text book names them but how they are named in the syllabus in the 2023 Guide as that is what the exam is based on. If you look at S3.2.2 it clearly lists the names of the nine functional groups...
S3.2 Functional groups - classification of organic compoundsHello Mani, If your student does the reaction with known quantities of reactants and catalyst at a known temperature with a temperature probe in the mixture they can follow the temperature change during the reaction to see how great the change is...
R2.2 (AHL) Activation energyHello Geoff, A student wants to find the Ea of an exothermic reaction - the famous Flinn Scientific 'pink catalyst'. Mixing in the water bath and looking for pink color is not feasible. So how do we justify finding the Ea of exothermic reactions,...
R2.2 (AHL) Activation energyHello Geoffrey, It's my firs time teaching IB chem and I have been using the Pearson Chemistry for the IB Diploma Higher Level to ensure I cover all material. The textbook calls the functional group of esters, R-COO-R', carboxyl (ester),...
S3.2 Functional groups - classification of organic compoundsHi again, That's strange. I wonder if it is because you are a private tutor - although that shouldn't really make difference. Please email mail@inthinking.net and...
Creating student accountsHi, Thank you for the quick response, I already have my groups,when I click on my groups,it does not take me to my groups,it takes me to instructions of how to create groups instead,
Creating student accounts
Geoffrey
Site authorMani, Since this is for an IA it is up to the student to decide and to explain in their report. You need to check that what they are doing is safe and and can lead to a good investigation but the student is responsible for devising their own method...
R2.2 (AHL) Activation energy