Practical: Factors Affecting Membrane Structure & Permeability The permeability of cell membranes is affected by different factors or conditions, such as: Temperature Solvent concentration &nbs...
Practical: Investigating Water Potential Practical 1: Investigating water potential using potato cylinders It is possible to investigate the effects of immersing plant tissue in solutions of differ...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.5.2 Disposal of Addition Polymers Disposal of Addition Polymers Addition polymers are formed by the joining up of many small molecules wit...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.5.1 Addition Polymers Monomers Polymers are large molecules of high relative molecular mass and are made by linking together large numbers...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.4.2 Bromine & Alkenes Bromine & Alkenes Alkenes are a homologous series of hydrocarbon compounds with at least one double bond bet...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.3.2 Halogens & Alkanes Halogens & Alkanes In a substitution reaction, one atom is swapped with another atom Alkanes undergo a subs...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.3.1 Alkanes The Alkanes Alkanes are a group of saturated hydrocarbons The term saturated means that they only have single carbon-carbon bo...
Practical: Investigating the Rate of Diffusion Recording a range of quantitative measurements It is important to use appropriate apparatus when recording a range of quantitative measurements Quanti...
EDEXCEL IGCSE CHEMISTRY: DOUBLE SCIENCE 复习笔记：4.2.4 Cracking Cracking Saturated molecules contain single bonds only whereas unsaturated molecules contain double bonds between their carbo...
