OCR chemistry Study guides, Class notes & Summaries

A Level Chemistry A H432/01 Periodic table, elements and physical chemistry

A Level Chemistry A H432/01: Periodic table, elements and physical chemistry Mark Scheme for June 2023

Module 4 Core Organic Chemistry (AS Chemistry OCR A) What is a Saturated Hydrocarbon A saturated hydrocarbon is a molecule containing only hydrogen and carbon atoms with single bonds only between the atoms. What is an Unsaturated Hydrocarbon An unsaturated hydrocarbon is a molecule containing only hydrogen and carbon atoms with one or more carbon-to-carbon multiple bonds What is a Homologous Series A family of compounds with similar chemical properties whose successive members...

OCR A Level Chemistry: Carbonyl Compounds revision test exam 2024 Product of oxidation of aldehydes Carboxylic acid Conditions/reagents for oxidation of aldehydes Reflux, acidified potassium dichromate Can ketones be oxidised? No

OCR A Level Chemistry: Carbonyl Compounds revision test exam 2024 Product of oxidation of aldehydes Carboxylic acid Conditions/reagents for oxidation of aldehydes Reflux, acidified potassium dichromate Can ketones be oxidised? No

OCR A-Level Chemistry Module 4 comprehensive exam 2024.

OCR A level chemistry a practical skills 2024 write down the steps to prepare a standard solution 1. weigh the solute using the weigh by difference method 2. in a beaker dissolve the solute using the solvent 3. pour the solution into a volumetric flask 4. rinse the beaker using the solution and add it to the flask 5. add solvent to the flask carefully until it reaches the graduation line 6. mix the solution thoroughly to ensure complete mixing what are the reasons for not obtaining...

OCR A level Chemistry Module 3 comprehensive exam 2024 Ernest rutherford Gold foil experiment- discovered nucleus (1909) Niels Bohr 1913- discovered that electrons move around the nucleus in orbits called electron shells. EM emitted/ absorbed when moving between levels- fixed frequency Mass Spectrometer steps 1. Vaporisation 2.Ionisation 3.Acceleration 4.Ion drift 5.Detection

Chemistry OCR A Module 3 test bank 2024 periodic trends in electron configurations across periods 2 and 3 each period starts with an electron in a new subshell *however across period 3 the 4s subshell fills first identify the s-block, p-block and d-block in the periodic table What is the first ionisation energy? The energy required to remove one electron from each atom in 1 mole of gaseous atoms of an element to form 1 mole of gaseous 1+ ions. What is the equation for ...

rate of reaction - correct answer Change in concentration of a reactant of product per unit time order - correct answer The power in which the concentration of the reactant is raised in the rate equation half-Life - correct answer The time taken for the concentration of a reactant to reduce by half rate determining step - correct answer The slowest step in a reaction mechanism of a multi-step reaction how would you carry out a clock reaction? - correct answer - measure time taken fro...

describe the structure of Benzene - correct answers: • a cyclic hydrocarbon with 6 carbon, and 6 hydrogen atoms. • the bond angle and shape around each carbon is 120' trigonal planar. • each C has 4 outer shell electrons; - 3 of these bond to 2 other carbon atoms, and 1 to a hydrogen atom. - these form a Sigma bond. - a fourth outer shell electron in the 2p orbital is left behind above and below the planes of the carbon atoms. • the electron in the p-orbital of a carbon atom ov...