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...
CollegeBoard發布SAT機考樣題，正式回應黃牛考位問題
今天，CollegeBoard正式放出了SAT機考樣題，并采取直播方式對機考模式進行講解，同時，首次正面回應了黃牛考位問題。 在今年1月份，CB宣布SAT進入機考時代，國際考場在2023年春季率先使用機考，自此，SAT機考正式...
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...
AQA A Level Chemistry復習筆記5.4.5 Lithium Cells
Lithium Cells Lithium ion cells power the laptop or mobile device you are probably reading this on The Noble Prize for Chemistry in 2019 was awarded to John B. Goodenough, M. Stanley Whittin...
AQA A Level Chemistry復習筆記5.4.4 Commercial Cells
Commercial Cells Electrochemical cells can be used as a commercial source of electrical energy Cells can be?non-rechargeable?(irreversible),?rechargeable?or?fuel cells Type of cells used in ...
