A Level Chemistry Study guides, Class notes & Summaries

A LEVEL CHEMISTRY EXAM WITH COMPLETE SOLUTIONS alkali - A type of base that dissolves in water forming hydroxide ions, OH- (aq) ions. alkanes - The homologous series with the general formula: CnH2n+2. alkyl group - An alkane with a hydrogen atom removed, e.g. CH3, C2H5; alkyl groups are often shown as 'R'. amount of substance - The quantity whose unit of the mole. Chemists use 'amount of substance' as a means of counting atoms. anhydrous - A substance that contains no water mo...

Aqa A-level Chemistry 7405-3 June23 Paper 3 Question Paper.

Aqa A-level Chemistry 7405-2 June23 Paper 2 Organic and Physical Chemistry Question Paper.

Aqa A-level Chemistry 7405-1 June23 Paper 1 Inorganic and Physical Chemistry Question Paper.

AQA A-Level Chemistry-Organic Scholar Overview Exam with Q & A alkene suffix ANSWER -ene alcohol suffix ANSWER -ol alcohol prefix ANSWER hydroxyl- haloalkanes prefixes ANSWER -chloro/boro/iodo aldehydes suffix ANSWER -al ketones suffix ANSWER -one ketones prefix ANSWER oxo- nitriles suffix ANSWER -nitrile amines suffix ANSWER -amine amines prefix ANSWER amino- Shows the number of each type of atom present. It does not tell you about the bonding within the compoun...

AQA A Level Chemistry- Inorganic Chemistry with On Hundred Questions and Confirmed Answers Periodic table ANSWER Table that provides chemists with a structural organisation of the known chemical elements that can be used to deduce physical and chemical properties Atomic radius across Period 3 ANSWER Decreases First ionisation energy across Period 3 ANSWER Increases Exceptions: Drops at Al and S Melting points across Period 3 ANSWER Increases from Na to Si Decreases from Si to Ar S...

AQA A Level Chemistry-Inorganic (New 2024/2025 Update) Exam with Questions and Answers Metallic (elements) ANSWER Sodium, magnesium and aluminium Semi-metal (metalloid) (elements) ANSWER Silicon Non-metals (elements) ANSWER Phosphorus, sulfur and chlorine Noble gas (elements) ANSWER Argon Metallic (Description) ANSWER Shiny, conduct electricity, react with dilute acids to give hydrogen and salts Semi-metal (metalloid) (Description) ANSWER Conducts electricity to some extent, us...

Chemistry AQA A-Level - Carboxylic Acids and Derivatives Guide for Upcoming Exams Carboxylic acids answer carboxylic acids How are carboxylic acids produced? ANSWER oxidation of primary alcohols or aldehydes What are the two types of carboxylic acids? ANSWER Aliphatic and aromatics What is the characteristic functional group of a carboxylic acid? ANSWER -COOH What is the strongest intermolecular force between water and a carboxylic acid?How does a ANSWER Hydrogen bonding How do...

What are standard conditions? 298K/25°C 100kPa/1 atm 1 moldm-3 Enthalpy change of formation The enthalpy change when 1 mole of a compound is formed from its constituent elements under standard conditions, with all reactants and products in their standard states. Enthalpy change of combustion The enthalpy change when 1 mole of a substance is burned completely in oxygen. Enthalpy change of atomisation The enthalpy change that accompanies the formation of 1 mole of gaseous atoms from ...

What is enthalpy change? Heat energy transferred in a reaction at constant pressure What are standard conditions for enthalpy change? 100kPa and stated temperature (normally 25 degrees celcius) What values of deltaH do exothermic reactions have? Negative (less than 0) What values of deltaH do endothermic reactions have? Positive (more than 0) What do exothermic reactions do with energy? Give out energy