Thank you, it was indeed just me getting muddled with the setting up of the cells. I will now be able to put this to the students correctly, thank you for sorting my muddle! I confess that I do find this topic very confusing at times. Your response...
R3.2 Electrochemical cellsHi Anne, Your students should know from the electrochemical series that the more negative the standard electrode potential is for the half-cell the stronger the reducing agent, and the more positive the value the stronger the oxidising agent;...
R3.2 Electrochemical cellsHi team, I came across a MC question I have trouble with and I would appreciate your view on how to explain it to the students. I know the correct answer and have my reasoning, but it won't hold water for the students. Using a conventional approach...
R3.2 Electrochemical cellsHello Austin, The total percentage uncertainty is 11%. Hence the uncertainty in the heat evolved = 11% of 8.36 kJ which is ± 0.92 kJ. The teacher support material states: "When the final percentage uncertainty is greater than or equal to...
Tools (HL) (2)Why is the final value and absolute uncertainty in question 20 given to one d.p.?
Tools (HL) (2)Extremely useful. Thank you!
Annotating any pageI'm not sure you need to take your comment back Austin. Question 3(e)(i), to which you refer, gives the equilibrium expression for K (sometimes in italics, sometimes not in italics) and in (ii) it refers to it again as the equilibrium...
The subject report and errors in the exam papersOne of my students has kindly pointed out that the correct name for the value calculated is the "reaction quotient" as it has not yet reached equilibrium. So I'll take back what I said about that question, although I feel like the wording was...
The subject report and errors in the exam papersI found a few issues with Paper 2: As someone else mentioned, inconsistent use of ΔH and ΔHr. One question about ester synthesis is terribly worded: two possible routes are given and then a later part asks students to calculate ΔHf of...
The subject report and errors in the exam papers
Austin
Thanks!
Tools (HL) (2)