Proton NMR produces a spectrum with a number of peaks. The number of peaks corresponds to the number of different chemical environments in which protons exist. OCREdexcelAQA Introducing NMR Proton NMR Carbon 13 NMR TMS Looking at the protons High resolution NMR - reveals a splitting pattern. This is produ...
OCREdexcelAQA Transition elements : properties Ligands and complex ions Ligand substitution and precipitation Redox reactions Electron configurations The video here uses the relevant section of the Royal Society of Chemistry's periodic table website to show the electron configurations of the first row of the transition ...
Lithium-ion cells : the Tesla solution This video explains the operation of lithium ion cells as used in Tesla cars. The video highlights the many advantages of the use of lithium in the battery pack. The many advantages of using electric motors to power cars are outlined here. Are there any disadvantages of using elect...
OCR Learning outcomes Additional guidance Synthesis and separation. Purification methods. Recrystallisation is a purification technique used to separate a solid compound from impurities by exploiting differences in solubility. How it works Dissolve the impure solid in a hot solvent in which the desired compound is highly soluble at high tempe...
Before tackling this topic make sure you are able to: explain the difference between intermolecular and intramolecular forces. use electronegativity values to work out dipoles within moleculesuse ideas about molecular shapes and dipoles to predict whether or not a molecule is polar. Hydrogen bonds in DNA&nbs...
Introduction Group 17 ( used to be group 7) contains a set of non-metals known collectively as The Halogens. Like many families, the members of Halogen family have a number of similarities to each other. However, they also have some very important differences. Activity 1: Ferocious Fluorine This video shows&nbs...
3.9 - 3.16 Rates of reaction paint must not dry too quickly 3.9 - 3.16 What is rate? How fast a chemical... https://www.mychem.co.uk/index.php/igcse-chemistry/physical-chemistry/rates-of-reaction Any measurable factor which changes as a reaction proceeds can be used to measure the rate. The gradient of graphs give a reading for the reac...
Intro image Edexcel 1Edexcel 2OCR Enter your text here ... Exothermic reactions always lead to an increase in entropy of the surroundings. In an example like this - the burning of magnesium in oxygen - the entropy of the system decreases because a giant ionic lattice ( Magnesium Oxide) is formed from the magnesium metal...
Hot and quick Investigating rates Results The rate of a chemical reaction is significantly affected by its temperature. the effect of temperature on rate can be shown visually using the Maxwell - Boltzmann distribution. OCR Enter your text here ... Edexcel AQA The Maxwell Boltzmann curve is a distribution curve which show...
Background This topic is mostly about equilibria so it is important for students to understand that concept first. Before tackling this topic make sure you : understand dynamic equilibriacan write and manipulate equilibrium expressions for a range of reactions.can estimate the pH value of a solution using universal indicator know th...
