Edexcel A Level Chemistry:復習筆記6.1.7 Storage Cells
Storage Cells Electrochemical cells can be used as a commercial source of electrical energy Cells can be described as?primary, secondary?or?fuel cells Primary cells are?non-rechargeable?(irr...
Edexcel A Level Chemistry:復習筆記6.1.6 Disproportionation & Electrode Potential
Disproportionation & Electrode Potential A?disproportionation?reaction is where one element in a chemical is simultaneously reduced and oxidised, e.g. 2Cu+?(aq) → Cu2+?(aq) + Cu (s) Stan...
Edexcel A Level Chemistry:復習筆記6.1.5 Thermodynamics & Electrode Potential
Thermodynamic Feasibility Feasibility The?E??values of a species indicate how?easily?they can get?oxidised?or?reduced The?more?positive the value, the easier it is to reduce the species on t...
Edexcel A Level Chemistry:復習筆記6.1.4 Conventional Cell Representation
Conventional Cell Representation Conventional Representation of Cells As it is cumbersome and time-consuming to draw out every electrochemical cell in full, a system of notation is used whic...
Edexcel A Level Chemistry:復習筆記6.1.3 Measuring Standard Electrode Potential
Measuring Standard Electrode Potential There are three different types of half-cells that can be connected to a standard hydrogen electrode to measure standard electrode potential A metal / ...
Edexcel A Level Chemistry:復習筆記6.1.2 Standard Electrode Potential
Standard Electrode Potentials Standard electrode potential The position of equilibrium and therefore the electrode potential depends on factors such as: Temperature Pressure of gases Concent...
Edexcel A Level Chemistry:復習筆記6.1.1 Reduction & Oxidation
Reduction & Oxidation To recap, there are three definitions of?oxidation?and?reduction? used in different branches of chemistry Oxidation?and?reduction?can be used to describe any of the...
Edexcel A Level Chemistry:復習筆記5.5.9 Arrhenius & Activation Energy
Arrhenius & Activation Energy The rate equation shows how each of the reactants in a reaction effects the rate of the reaction and it includes the rate constant,?k However,?k?only remain...
Edexcel A Level Chemistry:復習筆記5.5.8 Rates & Reaction Mechanisms
Deducing Reaction Mechanisms Chemical kinetics can only?suggest?a reaction mechanism, they cannot prove it However, they can be used to disprove a proposed mechanism Elementary steps ...
Edexcel A Level Chemistry:復習筆記5.5.7 Rate-Determining Steps
Deducing Rate-Determining Steps Rate-determining step & intermediates A chemical reaction can only go as fast as the slowest part of the reaction So, the?rate-determining step?is the slo...
Edexcel A Level Chemistry:復習筆記5.5.6 Reaction Order Graphs
Reaction Order Graphs Reaction Order Using Concentration-Time Graphs In a?zero-order?reaction, the concentration of the reactant is inversely proportional to time This means that the reactan...
2023年AP考試報名開始！附詳細報名流程和注意事項，社會考生速來！
9月19日，美國大學理事會College Board?宣布大陸2023年AP考試報名正式開啟。在2022-23學年，大學理事會繼續(xù)與Prometric合作管理國內(nèi)的AP考試報名和考務工作。 目前，2023年5月舉行的AP考試報名工作已經(jīng)正式啟動，...
