CIE A Level Chemistry復習筆記3.6.2 Esters
Production of Esters Esters?are compounds with an -COOR functional group and are characterised by their?sweet?and?fruity?smells They are prepared from the?condensation?reaction between a?carboxylic...
CIE A Level Chemistry復習筆記3.6.1 Carboxylic Acids
Production of Carboxylic Acids Carboxylic acids?are compounds with a -COOH functional group They can be prepared by a series of different reactions Oxidation of primary alcohols & aldehydes Car...
CIE A Level Chemistry復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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...
最后一周！2022年紐約時報夏季讀寫比賽即將結束，速度報名！
2022《紐約時報》夏季讀寫比賽?? 報名即將截止！ 學術活動時間：2022年6月10日-8月19日 2022紐約時報夏季讀寫比賽? 自2010年起， 《紐約時報》每年夏天都會舉辦的夏季讀寫比賽，目前全球已有超過8萬名中學生參與...
CIE A Level Chemistry復習筆記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...
