CIE A Level Chemistry复习笔记5.6.3 Half-Life
First Order Reaction Half-life The half-life of a first-order reaction is independent of the concentration of reactants This means that despite the concentrations of the reactants decreasing during...
CIE A Level Chemistry复习笔记5.6.2 Kinetics Calculations
Kinetics: Calculations Order of reaction The order of reaction shows how the concentration of a reactant affects the rate of reaction Rate = k [A]m [B]n When m or n is zero = the concentration of t...
CIE A Level Chemistry复习笔记5.6.1 Basics of Kinetics
Kinetics: Basics The rate of reaction refers to the change in the amount or concentration of a reactant or product per unit time and can be found by: Measuring the decrease in the concentration of ...
CIE A Level Chemistry复习笔记5.5.9 Partition Coefficients
Partition Coefficient & Calculations The partition coefficient (Kpc) is the ratio of the concentrations of a solute in two different immiscible solvents in contact with each other when equilibr...
CIE A Level Chemistry复习笔记5.5.8 The Common Ion Effect
Solubility Product & the Common Ion Effect A saturated solution is a solution that contains the maximum amount of dissolved salt If a second compound, which has an ion in common with the dissol...
CIE A Level Chemistry复习笔记5.5.7 Solubility Product Calculations
Calculating the Solubility Product Calculations involving the solubility product (Ksp) may include:: Calculating the solubility product of a compound from its solubility Calculating the solubility ...
南加大Marshall商学院本科专业获STEM认证，有资格申请延长OPT至36个月
2023年美国大学本科秋季入学入学申请已经启动，名校陆续更新招生政策。U.S. News排名27的南加大好消息频出！ 首次新增EA轮次 参考链接：《USC南加大新增早申EA轮，附南加大申请要求！》 Marshall商学院获STEM认证...
CIE A Level Chemistry复习笔记5.5.6 Solubility Product
Solubility Product Solubility is defined as the number of grams or moles of compound needed to saturate 100 g of water, or it can also be defined in terms of 1 kg of water, at a given temperature F...
CIE A Level Chemistry复习笔记5.5.5 Buffer Calculations
Calculating pH of Buffer Solutions The pH of a buffer solution can be calculated using: The Ka of the weak acid The equilibrium concentration of the weak acid and its conjugate base (salt) To deter...
CIE A Level Chemistry复习笔记5.5.4 Buffers
Buffers A buffer solution is a solution in which the pH does not change a lot when small amounts of acids or alkalis are added A buffer solution is used to keep the pH almost constant A buffer can ...
CIE A Level Chemistry复习笔记5.5.3 pH & [H+] Calculations
Calculating [H+] & pH If the concentration of H+ of an acid or alkali is known, the pH can be calculated using the equation: pH = -log [H+] Similarly, the concentration of H+ of a solution can ...
2023年纽约大学秋季入学申请材料发生变化，更新文书题目及推荐信要求
8月1日，23Fall美本申请系统Common Application正式开放，申请美本的留学生们已经可以开始提交材料，也正式宣告今年的申请季已经正式启动！ 而在Common Application中，我们还发现多年未更新补充题目的纽约大学（...
