Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 1.1.2 Living Organisms: Nutrition & Respiration Nutrition Organisms must obtain food to provide?energy Energy is necessary to carry out life proce...
Edexcel IGCSE Biology: Double Science 復(fù)習(xí)筆記 1.1.1 The Unifying Characteristics of Living Organisms The Unifying Characteristics of Living Organisms In order for something to be considered...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.8.3 Condensation Polymers Condensation Polymers Condensation polymers are formed when?two different monomers?are linked together with the?removal?of a smal...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.8.2 Disposal of Addition Polymers Disposal of Addition Polymers Addition polymers are formed by the joining up of many small molecules with?strong C-C bond...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.8.1 Addition Polymers Monomers Polymers are large molecules of?high relative molecular mass?and are made by linking together large numbers of smaller molec...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.7.2 Practical: Preparation of Ethyl Ethanoate Practical: Preparation of Ethyl Ethanoate Aim: To prepare a small sample of ethyl ethanoate Diagram: &...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.7.1 Esters The Esters Making Esters Alcohols and carboxylic acids react to make esters in?esterification?reactions Esters are compounds with the functional...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.6.2 Reactions of Carboxylic Acids Reactions of Carboxylic Acids The carboxylic acids behave like other acids They react with?metals?to form a salt and hydr...
Edexcel IGCSE Chemistry 復(fù)習(xí)筆記 4.6.1 Carboxylic Acids The Carboxylic Acids Carboxylic acids?is the name given to compounds containing the functional group?carboxyl, -COOH The general formu...
