A Level H2 Chemistry 2021 Paper 3 Answers [exclusive] Review

erroneously will result in full penalization. Authors should prioritize writing −CH3negative CH sub 3

Differentiate the field strengths of the bound ligands (e.g., H2Ocap H sub 2 cap O O2cap O sub 2

Many students drew the N=N bond connecting to the ortho position. The para position is thermodynamically favored due to less steric hindrance. A Level H2 Chemistry 2021 Paper 3 Answers

A large portion of candidates dropped marks here by using the single-proton concentration for , failing to update the final total volume (

orbital. The resulting between the paired electrons makes it easier to remove the electron from sulfur than from phosphorus. erroneously will result in full penalization

atoms exert a strong electron-withdrawing inductive effect. This disperses the negative charge on the carboxylate group, stabilizing the conjugate base ( Significantly Higher Minimal Extent The electron-donating alkyl ( CH3CH sub 3

: Unless otherwise directed by data constants (like a 4 s.f. instruction), intermediate values should retain extra figures, but final calculated numerical results must be rounded to 3 significant figures . A large portion of candidates dropped marks here

Amount of H+=50.01000×0.100×2=0.0100 molAmount of cap H raised to the positive power equals 50.0 over 1000 end-fraction cross 0.100 cross 2 equals 0.0100 mol

Unlike Paper 2’s structured questions, Paper 3 consists of free-response questions divided into Section A (compulsory) and Section B (choice). It focuses heavily on: