2023Fall美本申請季布朗大學新增申請誠信審查
隨著新申請季開啟，美國大學的招生政策調整也陸續公布，大多數都是申請時間、文書題目的變化，但布朗大學新申請季的政策微調卻吸引了大家的關注。布朗大學在今年的申請介紹中，增加了一條：申請誠信審查的說明。 ...
CIE A Level Chemistry復習筆記7.5.6 Production & Reactions of Acyl Chlorides
Production of Acyl Chlorides Due to the increased reactivity of acyl chlorides compared to carboxylic acids, they are often used as?starting compounds?in organic reactions Acyl chlorides are compou...
CIE A Level Chemistry復習筆記7.5.5 Production of Esters
Production of Esters by Reacting Alcohols With Acyl Chlorides Esters?are organic compounds with an -COR functional group They have?characteristic smells?and are used in perfumes, cosmetics and as s...
CIE A Level Chemistry復習筆記7.5.4 Relative Acidities of Chlorine-substituted Carboxylic Acids
Relative Acidities of Chlorine-Substituted Carboxylic Acids Electron-withdrawing?groups bonded to the carbon attached to the -COOH group make the carboxylic acids?stronger acids This is because the...
CIE A Level Chemistry復習筆記7.5.3 Relative Acidities of Carboxylic Acids, Phenols & Alcohols
Relative Acidities of Carboxylic Acids, Phenols & Alcohols Carboxylic acids?are compounds with a -COOH functional group They can act as?acids?and lose a proton (H+?ion) in an aqueous solution t...
CIE A Level Chemistry復習筆記7.5.2 Reactions of Carboxylic Acids
Reactions of Carboxylic Acids to Produce Acyl Chlorides Acyl chlorides?are compounds with the functional group -COCl They look similar in structure to?carboxylic acids?but have a Cl atom instead of...
2023年UIUC早申政策有變動，南加大和紐大也官宣最新招生政策
8月1日，23Fall美本申請系統Common Application正式開放，申請美本的留學生們已經可以開始提交材料，也正式宣告今年的申請季已經正式啟動！ 隨著Commom App的開放，美國許多熱門院校官宣了最新的招生政策。 一、...
CIE A Level Chemistry復習筆記7.5.1 Production of Benzoic Acid
Production of Benzoic Acid Benzoic acids?are the simplest?aromatic carboxylic acids?with the molecular formula of C6H5COOH Benzoic acids and their derivatives are often used as reagents in the synt...
CIE A Level Chemistry復習筆記7.4.6 Reactions of Other Phenolic Compounds
Reactions of Other Phenolic Compounds Phenolic compounds?are those that contain a?phenol?functional group An example of a phenolic compound is?1-naphthol 1-Naphthol is a phenolic compound 1-Naphtho...
CIE A Level Chemistry復習筆記7.4.5 Nitration & Bromination of Phenol
Nitration & Bromination of Phenol Compared to?benzene, phenol?reacts?more readily?with?electrophiles This is because?one of the lone pairs?of electrons on the oxygen atom in phenol?overlaps?wit...
CIE A Level Chemistry復習筆記7.4.4 Acidity of Phenols
Acidity of Phenols Although phenol compounds contain an?alcohol?(-OH) group, they are?weakly acidic This is due to the?delocalisation?of one of the lone pairs from the oxygen atom into the aromatic...
CIE A Level Chemistry復習筆記7.4.3 Reactions of Phenol
Reactions of Phenol Phenols can undergo many types of reactions as both the?electron-rich benzene ring?and the?polar -OH?group can participate in chemical reactions Some of the reactions of phenols...
