Study guides, Study 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

OCR A level Chemistry assessment exam 2024 Addition Reaction A reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule Acid Dissociation Constant Ka= [H+(aq)][A-(aq)]/[HA(aq)] Aliphatic Hydrocarbon A hydrocarbon where carbon atoms are joined together in straight or branched chains

OCR a level chemistry year 2 physical rate constant, k constant that links the rate of reaction with the concentrations of reactants raised to the powers of their orders in the rate equation rate equation Rate = k[A]^m[B]^n overall order the sum of the orders of all reactants in a chemical reaction

OCR Chemistry A Level colours What colour is Fe²⁺(aq)? Green What colour is Fe³⁺(aq)? Brown What colour is Cu⁺(aq)? Colourless

Transition metals OCR A Level Chemistry comprehensive exam 2024 What is the definition of a transition element? D-block element which form at least one ion with a partially filled d orbital Which 2 elements in the d block do not qualify as transition metals and why? Zinc and scandium. Their ions have full d orbitals and not partially filled d orbitals What are the 3 properties of transition metals? Have variable oxidation states, form coloured compounds and can act as catalys...

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