A-Level生物难吗？学习成功的关键是什么？
A-Level生物难吗？很多同学想选A-level生物，但是不知道难度怎么样。看小编给大家理性分析一下，A-level生物的真实难度，帮助大家学好A-Level生物，勇夺A*! A-Level生物主要学些什么？ 与GCSE一样，A-level生物覆...
IB DP Chemistry: SL复习笔记7.1.2 The Equilibrium Law
The Equilibrium Constant Equilibrium expression & constant The equilibrium expression is an expression that links the equilibrium constant, Kc, to the concentrations of reactants and products a...
IB DP Chemistry: SL复习笔记7.1.1 The State of Equilibrium
The State of Equilibrium Reversible reaction Some reactions go to completion where the reactants are used up to form the products and the reaction stops when all of the reactants are used up In rev...
IB DP Chemistry: SL复习笔记6.1.8 Energy Profiles & Catalysis
Energy Profiles & Catalysis Catalysis is the process in which the rate of a chemical reaction is increased, by adding a substance called a catalyst A catalyst increases the rate of a reaction b...
IB DP Chemistry: SL复习笔记6.1.7 Maxwell-Boltzmann Curves
Maxwell-Boltzmann Curves Boltzmann distribution curve The Boltzmann distribution curve is a graph that shows the distribution of energies at a certain temperature In a sample of a substance, a few ...
IB DP Chemistry: SL复习笔记6.1.6 Explaining Rates
Explaining Rates Concentration The more concentrated a solution is, the greater the number of particles in a given volume of solvent An increase in concentration causes in an increased collision fr...
IB DP Chemistry: SL复习笔记6.1.5 Rate Experiments
Rate Experiments During a reaction, the reactants are used up and changed into the products This means that as the reaction proceeds, the concentration of the reactants is decreasing and the concen...
IB DP Chemistry: SL复习笔记6.1.4 Activation Energy
Activation Energy For a reaction to take place, the reactant particles need to overcome a minimum amount of energy This energy is called the activation energy (Ea) In exothermic reactions the react...
IB DP Chemistry: SL复习笔记6.1.3 Measuring Rates
Measuring Rates To measure the rate of a reaction, we need to be able to measure either how quickly the reactants are used up or how quickly the products are formed The method used for measuring de...
