A-Level經濟學主要學習內容，應該如何沖刺A*？
A-Level經濟學Economics是A-Level最受學生歡迎的科目之一，但是很多學生認為A-Level經濟學的學習難度較大、高分率低，“不選不行，選了痛苦”成為了很多選擇A-Level經濟學學生的寫照。 A-Level經濟學主要學習內容 ...
A-level重考影響申請英國G5嗎？
今年的A-level大考結束了，包括國際考試局和英國本土。然而今年的形勢，小編也給大家說了，英國打算削減A-level高分6萬個，今年上萬人將無緣大學錄取！考試發揮失利，或成績不錯但報空了的同學，怎么辦？這就引出...
AQA A Level Chemistry復習筆記5.6.5 Buffers
Acid & Basic Buffers A?buffer solution?is a solution which resists changes in pH when small amounts of acids or alkalis are added A buffer solution is used to keep the pH almost constant...
AQA A Level Chemistry復習筆記5.6.4 pH Curves
pH Curves During a titration a pH meter can be used and a pH curve plotted A pH curve is a graph showing how the pH of a solution changes as the acid (or base) is added The result is charact...
AQA A Level Chemistry復習筆記5.6.3 Titrations
Titrations Volumetric analysis?is a process that uses the volume and concentration of one chemical reactant (a standard solution) to determine the concentration of another unknown solution T...
AQA A Level Chemistry復習筆記5.6.2 pK?
pK? The range of values of?Ka?is very large and for weak acids, the values themselves are very small numbers Table of?Ka?values For this reason it is easier to work with another term ...
AQA A Level Chemistry復習筆記5.5.3 The Ionic Product of Water
The Ionic Product of Water In all aqueous solutions, an equilibrium exists in water where a few water molecules dissociate into protons and hydroxide ions We can derive an equilibrium consta...
AQA A Level Chemistry復習筆記5.5.2 pH & [H?]
pH & [H?] The acidity of an aqueous solution depends on the number of?H+?(H3O+) ions in solution The?pH?is defined as: pH = -log[H+] where [H+] is the concentration of hydrogen ions in m...
AQA A Level Chemistry復習筆記5.4.6 Fuel Cells
Fuel Cells A fuel cell is an electrochemical cell in which a fuel?donates?electrons at one electrode and oxygen?gains?electrons at the other electrode These cells are becoming more common in...
