2023年AP考试科目选择推荐！
AP课程是美国大学录取学生的重要依据，一份优秀的AP成绩单不仅能为同学们的申请锦上添花，还能让同学们提前了解大学课程，帮助大家更快速地适应大学的课程学习。2023年AP考试科目选择推荐来了！ AP考试科目推荐 1...
Edexcel A Level Chemistry:复习笔记2.3.4 Halide Ion Reactions
Halide Ion Reactions Concentrated sulfuric acid Chloride, bromide and iodide ions react with concentrated sulfuric acid to produce toxic gases These reactions should therefore be carried out...
Edexcel A Level Chemistry:复习笔记2.3.3 Halogen Redox Reactions
Halogen Redox Reactions Reactions with Group 1 & 2 metals The halogens react with some metals to form ionic compounds which are metal halide salts In all reactions where halogens are rea...
Edexcel A Level Chemistry:复习笔记2.3.2 Halogen Displacement Reactions
Halogen Displacement Reactions The reactivity of halogens is also shown by their displacement reactions with other halide ions in solutions A more reactive halogen can displace a less reacti...
Edexcel A Level Chemistry:复习笔记2.3.1 Group 7 Trends
Physical Properties The Group 7 elements are called halogens The halogens have uses in water purification and as bleaching agents (chlorine), as flame-retardants and fire extinguishers (brom...
Edexcel A Level Chemistry:复习笔记2.2.5 Flame Tests
Flame Tests Metal ions produce a colour if heated strongly in a flame Ions from different metals produce different colours The flame test is thus used to identify metal ions by the colour of...
Edexcel A Level Chemistry:复习笔记2.2.4 Group 2 Carbonates & Nitrates
Group 2 Carbonates & Nitrates Thermal decomposition is the breakdown of a compound into two or more different substances using heat Thermal decomposition of carbonates The Group 2 carbon...
Edexcel A Level Chemistry:复习笔记2.2.3 Group 2 Hydroxides & Sulfates
Group 2 Hydroxides & Sulfates Group 2 hydroxides Going down the group, the solutions formed from the reaction of Group 2 oxides with water become more alkaline When the oxides are dissol...
Edexcel A Level Chemistry:复习笔记2.2.2 Reactions of Group 2
Group 2 Elements Reactions with water and oxygen The reaction of group 2 metals with oxygen follows the following general equation: 2M (s) + O2 (g) → 2MO (s) Where M is any metal in group 2 ...
