Hi Leonie, We are hoping to change this soon as it will obviously be useful, but at the moment groups cannot be shared by two teachers. You can add another teacher as a 'student' to your group so they can see what is going on but if they...
Using student accessHello, The student access is brilliant thank you. Is there a way to add another teacher to the groups? We share our IB classes, so it would be useful for both teachers to have access to the same student group for setting/monitoring...
Using student accessThank you Geoff!
R3.2 (AHL) Electrochemical cellsHi James, For us chemists (I know the physicists sometimes do things differently), I would always encourage students to ensure that the precision of their raw readings matches their raw uncertainty. So in question 3, if the uncertainty of the...
Identifying and fixing mistakesIf the uncertainty of the total titre is given (correctly) as ± 0.1 cm3 shouldn't the volumes then be recorded to 1 decimal place?
Identifying and fixing mistakesMani, Students probably only need to know that it is a concentration effect. The Eo values for the half-cells given in the data booklet are for standard conditions (i.e. for solutions with a concentration of 1.00 mol dm-3)....
R3.2 (AHL) Electrochemical cellsThanks so much for this.
R3.2 (AHL) Electrochemical cellsHello, Do students need to explain why chlorine is preferentially discharged in the electrolysis of concentrated NaCl? And if so, what is the explanation? Does E value change?
R3.2 (AHL) Electrochemical cellsMani, The syllabus (R3.2.7) for both SL and HL does not actually state that the students need to know the half-equations for the charging and discharging of secondary cells but it does state that they should be able to deduce them given the...
R3.2 (AHL) Electrochemical cells
Mini
Hi Geoffery, With regards to syllabus statement 3.2.5- IUPAC nomenclature, would students be required to identify compounds with more than one functional groups such as a carbonyl- aldehyde and a ketone group? The syllabus statement indicates...
S3.2 Functional groups - classification of organic compounds