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IB Approved Workshops

Chemistry
IB DP Category 2

Stockholm, Sweden, 2 - 4 May 2025
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Chemistry
IB DP Category 2

Barcelona, Spain, 29 - 31 August 2025
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Chemistry: A focus on the experimental programme
IB DP Category 3

Online (IB Approved), 17 - 19 October 2025
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Subscriber comments

Mini

S3.1 (AHL) Transition metals

Hello, Please could you clarify this question for me: How detailed are students required to know the mechanism of action of Ziegler-Natta catalyst during the ploymerization of ethene molecules? Thank you for taking the time to read my comment...

Geoffrey

R1 (HL) What drives chemical reactions? (1)

You are right Wondoo, the minus sign had been omitted. It is corrected now.

Wondoo

R1 (HL) What drives chemical reactions? (1)

hello, Geoffrey/Paul I have a suspected sign for answer of question #20 and would like to ask for confirmation. In Answer box, "ΔG⦵ = − RTlnKc, so lnKc = ΔG⦵...

Geoffrey

S3.2 (AHL) Mass spectrometry, IR & ¹H NMR spectroscopy

Hello Rafael, I wondered about this too as it is not very clear. I checked back whether there actually has been a fundamental change in approach. There is no mass spec data given in the 2009 IB data booklet. There is in the data booklet for...