CIE A Level Chemistry复习笔记3.5.5 Iodoform Reaction
Iodoform Reaction Tri-iodomethane (also called iodoform) forms a yellow precipitate with methyl ketones Methyl ketones are compounds that have a CH3CO-group Ethanal also contains a CH3CO- group and...
CIE A Level Chemistry复习笔记3.5.4 Carbonyl Compound Tests
Testing for Carbonyls: 2,4-DNPH 2,4-dinitrophenylhydrazine (also known as 2,4-DNPH) is a reagent which detects the presence of carbonyl compounds (compounds with -C=O group) The carbonyl group of a...
CIE A Level Chemistry复习笔记3.5.3 Reaction with HCN
Reaction of Hydrogen Cyanide with Aldehydes & Ketones The carbonyl group -C=O, in aldehydes and ketones is polarised The oxygen atom is more electronegative than carbon drawing electron density...
CIE A Level Chemistry复习笔记3.5.2 Reactions of Aldehydes & Ketones
Reactions of Aldehydes & Ketones Reduction of aldehyde & ketones Aldehydes and ketones can be reduced by reducing agents such as NaBH4 or LiAlH4 Aldehydes are reduced to primary alcohols Ke...
CIE A Level Chemistry复习笔记3.5.1 Production of Aldehydes & Ketones
Production of Aldehydes & Ketones Aldehydes and ketones are carbonyl compounds containing a C=O group They can be prepared from the oxidation of primary and secondary alcohols respectively Oxid...
CIE A Level Chemistry复习笔记3.4.4 Alcohol Dissociation
Acidity of Alcohols Alcohols have a low degree of dissociation This means, that when dissolved in water, alcohol molecules do not dissociate (split up) to a great extent ROH (aq) ⇄ RO- (aq) + H+ (a...
CIE A Level Chemistry复习笔记3.4.3 Classifying and Testing for Alcohols
Classifying Alcohols Primary alcohols are alcohols in which the carbon atom bonded to the -OH group is attached to one other carbon atom (or alkyl group) Secondary alcohols are alcohols in which th...
CIE A Level Chemistry复习笔记3.4.2 Reactions of Alcohols
Reactions of Alcohols Alcohols are reactive molecules which undergo a wide range of reactions Combustion of alcohols Alcohols react with oxygen in the air when ignited and undergo complete combusti...
CIE A Level Chemistry复习笔记3.4.1 Production of Alcohols
Production of Alcohols Alcohols are compounds that contain at least one hydroxy (-OH) group The general formula of alcohols is CnH2n+1OH Alcohols can be prepared by a wide range of chemical reactio...
