Recent content by Isomorph

Oh, apologies I did not make the connection with the combinations he provided. I was referring specifically to the 2 Unit English, 4 Unit Maths, chemistry and physics combination, which is commonly referred to as the "asian 10" for brevity. As far as I know I have not seen it used in a way...

What even is combo 2? Do you mean the "asian 10"?

Haha are you sure last questions for most schools are easy. Prepare for some insane perms and combs... :)

From what I have done so far, mechanics problems incorporating 2D vectors in the new syllabus are restricted to projectile motion, which usually can be solved by resolving the vectors into components and solving independently. Have you come across any non-standard mechanics problems that are...

As you note, the syllabus is a major improvement on the last, and has shifted the subject closer to math on the "understanding vs. knowledge" spectrum. However, unfortunately, it still retains artefacts of the old, such as petroleum production, soaps and societal implications of chemical...

Hello, What do you all think of the new vectors topic? I'm not sure quite what to make of it. They seem to really like intersection questions (where you simply solve the simultaneous equations), but other than that and geometry questions (limited to parallel and perpendicular lines, proving...

Yeah I think you are right that there is no straight HSC syllabus method. I have made a great number of attempts but the core of the problem is that the syllabus offers no way to reduce any species except using Pd/C/H2, which is not helpful for diols and triols, as any attempt to dehydrate them...

Bromination actually produces 97% 2-bromopropane, although the proportion is close for chlorination. The explanation is interesting and can be found here https://www.masterorganicchemistry.com/2013/10/31/selectivity-in-free-radical-reactions-bromine-vs-chlorine/

A route to producing 1-propanol from propene can be completed using only syllabus reactions as the major product. Brominate propene under UV light to form exclusively 3-bromopropene (dilute Br2 conditions to avoid further bromination). This occurs not only because the only saturated site is...

Yeah I looked into it mostly out of interest and curiosity especially given it was such a common complex ion. Although, the IB syllabus does mention "Explanation of the effect of the... identity of the ligand on the colour of transition metal ion complexes.", and on p114 of the book you linked...

I should mention for those interested - that the charge transfer does not have to occur on the same species! For example, the triphenylphosphine - iodine charge transfer complex is one, where an electron transfers for the triphenylphosphine to the iodine, in essence forming [PPh3I]+ I- While the...

Wow, thank you for presenting the interesting history of the complex! Regarding the colours, I believe that it is much more complex than appears at first sight. For example, one might pose the question of, why is the complex [Fe(H2O)6]3+ much less intensely coloured than [Fe(H2O)5(NCS)]2+...

This has got me interested. I can't find reliable data on the identity of the complex I.e tetrahedral or octahedral which is strange for such a common complex; nevertheless the extinction coefficient of around 4000 is very high for an d-d transition. I suspect it might be a charge transfer band...

One last one that I'll post up, Question 29, probably more challenging than either of the previous ones. It also incorporates some of those skills from year 11 and previous year 12 modules so it's good for review. Like before, give it a go if you're interested and feel free to post your...

I believe the approach you are suggesting is the "on and off" where restrictions are put in place and the released in cycles as infections climb, thereby creating a sense of normality for at least periods of times? If instead you are looking at a long term release in restrictions, indeed as you...