A-Level Chem Solved
@ALevelCS
A twitter account set up to boost the grades of the 'average' A-Level Chemistry student | Also watch out for the #DailyChemJoke | Generally AQA
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Make sure mechanisms make chemical sense: Curly arrows move AWAY from electron RICH regions and point TOWARDS electron DEFICIENT regions!!!
Drawing complex ions - 3D structure with metal ion and ligands inside square brackets and overall charge outside!
Hydrogen Fuel Cells - ADSORPTION or ABSORPTION of hydrogen gas is used as an alternative to high pressure storage-A2
If both standard electrode potentials are +ve, then the less positive electrode will oxidise and the more positive electrode will reduce
E cells: the more positive electrode is where reduction takes place, oxidation at the less positive electrode
Moles are central to chemistry calculations 🔼 literally!
7 elements exist as diatomic molecules in their standard states! Be sure to include the correct formulas in equations
"Are you ready for your chemistry exam tomorrow?"
The number of peaks in carbon NMR represents the number of carbon environments 📶
✏️⚡️✏️Graphite is a giant covalent structure that is able to conduct electricity due to delocalised electrons between carbon layers ✏️⚡️✏️
A2-NMR the number of peaks in the spectra tells you the number of environments, peaks can be split by neighbouring environment's elements
The shape of a molecules is determined by the number of electron pairs. Identify bonding-- and lone pairs: ❇️ lone pairs repel > bonding
Phenol is more reactive than benzene as it is able to polarise other molecules, due to the increased electron density donation from oxygen
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