IB DP Chemistry: HL复习笔记9.1.10 Electrolytic Cells
Electrolytic Cells An ionic compound conducts electricity when it is molten or in solution The current causes the ionic compound to split up and form new substances. This process is called electrol...
IB DP Chemistry: HL复习笔记9.1.9 Voltaic Cells
Voltaic Cells Voltaic (or Galvanic) cells generate electricity from spontaneous redox reactions For example: Zn (s) + CuSO4 (aq)→ Cu (s) + ZnSO4 (aq) Instead of electrons being transferred direct...
IB DP Chemistry: HL复习笔记9.1.8 The Winkler Method
The Winkler Method The Winkler Method is a technique used to measure dissolved oxygen in freshwater systems Dissolved oxygen is used as an indicator of the health of a water body, where higher diss...
IB DP Chemistry: HL复习笔记9.1.7 Redox Titrations
Redox Titrations In a titration, the concentration of a solution is determined by titrating with a solution of known concentration. In redox titrations, an oxidizing agent is titrated against a red...
IB DP Chemistry: HL复习笔记9.1.6 The Activity Series
The Activity Series Metals can be ranked in order of reactivity -this is called the reactivity series or just activity series Metals higher in reactivity can displace less reactive metals from thei...
IB DP Chemistry: HL复习笔记9.1.5 Half Equations
Half Equations Oxidation numbers can be used to balance chemical equations Go through these steps to balance a redox equation: Write the unbalanced equation and identify the atoms which change in o...
IB DP Chemistry: HL复习笔记9.1.4 Naming Transition Metal Compounds
Naming Transition Metal Compounds Transition metals are characterized by having variable oxidation numbers. Oxidation numbers can be used in the names of compounds to indicate which oxidation numbe...
IB DP Chemistry: HL复习笔记9.1.3 Oxidizing & Reducing agents
Oxidizing & Reducing Agents Oxidising agent An oxidising agent is a substance that oxidises another atom or ion by causing it to lose electrons An oxidising agent itself gets reduced – gains el...
美国高校发布CS录取新政！UMich、UIUC官宣CS直录新政策
或许每个留学生身边都有这样一位同学：不是在学CS的路上就是在转CS的路上... 火到商科都得让步的计算机专业，在留学圈有多“红”呢？——不止中国留学生热衷，全世界的优秀高中生们都“挤破了头”想进CS名校。 但是正因...
IB DP Chemistry: HL复习笔记9.1.2 Deducing Oxidation Numbers
Deducing Oxidation Numbers The oxidation numbers of all other atoms in their compounds can vary By following the oxidation number rules, the oxidation number of any atom in a compound or ion can be...
IB DP Chemistry: HL复习笔记9.1.1 Oxidation & reduction
Oxidation & Reduction 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 following proces...
IB DP Chemistry: HL复习笔记8.3.3 Reducing Sulfur Oxide Emissions
Reducing Sulfur Oxide Emissions The removal of sulfur from fossil fuels can either take place pre-combustion or post-combustion The oxides of sulfur, SO2 and SO3, are both acidic and toxic gases S...
