A Level H2 Chemistry 2021 Paper 3 Answers !exclusive! -

Students had to relate the stability of compounds to their lattice energy and hydration energy.

Part (a) could ask you to draw the mechanism for a nucleophilic substitution (SN1 or SN2) or electrophilic addition. Part (b) might present a multi-step synthesis problem, requiring you to deduce the reagents and conditions needed to convert one functional group to another. Part (c) could involve the structural analysis of an unknown organic compound using data from spectroscopic methods like IR, Mass Spec, or 13C NMR. A Level H2 Chemistry 2021 Paper 3 Answers

The highlighted three key patterns:

Combine the volumes of the buffer aliquot ( ) and the added acid ( Students had to relate the stability of compounds

Suggest how to determine rate of reaction from given data. Part (c) could involve the structural analysis of

Gives candidates a choice to answer one out of two questions. Key Topic Breakdowns & Suggested Solution Pathways 1. Physical Chemistry: Buffers and Weak Acid Dissociation

molar enthalpy of combustion = energy released / moles of ethanol molar enthalpy of combustion = -29.7 kJ / 0.0434 mol = -684 kJ/mol