IB DP Chemistry: HL复习笔记19.1.5 Free Energy & Eº
Free Energy & Eº Previously we have seen the concept and term free energy, ΔGθ Free energy is a measure of the available energy to do useful work and takes into account the entropy change, ΔSθ,...
IB DP Chemistry: HL复习笔记19.1.4 Quantitative Electrolysis
Quantitative Electrolysis Michael Faraday showed, in 1833, that the amount of products obtained is dependent on the quantity of electrical charge passed through the cell Electrical charge is a meas...
IB DP Chemistry: HL复习笔记19.1.3 Electrolysis of Aqueous Solutions
Electrolysis of Aqueous Solutions We have seen previously how simple binary compounds can be electrolysed when molten and the products of electrolysis can be predicted using our knowledge of the io...
IB DP Chemistry: HL复习笔记19.1.2 The Standard Hydrogen Electrode
The Standard Hydrogen Electrode The absolute value of a half cell potential cannot be measured, only differences in potential between pairs of half-cells. For this reason, it is necessary to have a...
IB DP Chemistry: HL复习笔记19.1.1 Electrochemical Cells
Electrochemical Cells We have seen previously that redox reactions involve simultaneous oxidation and reduction as electrons flow from the reducing agent to the oxidizing agent Which way electrons ...
IB DP Chemistry: HL复习笔记18.2.2 Acid & Base Problem Solving
Acid & Base Calculations pH The acidity of an aqueous solution depends on the number of H3O+ ions in solution pH is defined as: pH = -log [H3O+] Where [H3O+] is the concentration of H3O+ ions i...
IB DP Chemistry: HL复习笔记18.2.1 Acid & Base Dissociation Constants
Acid & Base Dissociation Constants Weak acids A weak acid is an acid that partially (or incompletely) dissociates in aqueous solutions For example, most carboxylic acids (e.g. ethanoic acid), H...
IB DP Chemistry: HL复习笔记18.1.5 Salt Hydrolysis
Salt Hydrolysis An ionic salt is formed from the neutralisation reaction of an acid and base Neutralisation The ionic salt, MA, formed will dissociate in water Hydrolysis is where water is used to...
IB DP Chemistry: HL复习笔记18.1.4 Buffers
Buffers A buffer solution is a solution which resists changes in pH when small amounts of acid or base are added A buffer solution is used to keep the pH almost constant A buffer can consist of wea...
