英国G5最受欢迎的热门专业是哪些？竞争究竟有多激烈？
如果将英国大学的申请难度进行划分，G5院校毫无疑问稳居金字塔顶端。 由于申请人数众多，G5不仅整体录取率低迷，热门专业的申请更是难上加难。 那么，G5本科那些申请人数最多的专业，竞争究竟有多激烈？我们为你...
IB DP Chemistry: HL复习笔记8.2.6 pH Meters & Universal Indicator
pH Meters & Universal Indicator The most accurate way to determine the pH is by reading it off a pH meter The pH meter is connected to the pH electrode which shows the pH value of the solution ...
IB DP Chemistry: HL复习笔记8.2.5 Acid-Base Calculations
Acid-Base Calculations Using the relationships between pH, [H⁺] and [OH⁻] a variety of problems can be solved pH = - log [H+] and Kw = [H+] [OH-] Test your understanding on the following work...
IB DP Chemistry: HL复习笔记8.2.4 The Ionic Product of Water
The Ionic Product of Water pH of water An equilibrium exists in water where few water molecules dissociate into proton and hydroxide ions H2O(l) ⇌ H+(aq) + OH-(aq) The equilibrium constant for this...
IB DP Chemistry: HL复习笔记8.2.3 Interpreting pH
Interpreting pH The pH scale is a numerical scale that shows how acidic or alkaline a solution is The values on the pH scale go from 0-14 (extremely acidic substances have values of below 0) All ac...
IB DP Chemistry: HL复习笔记8.2.2 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: where [H+] is the concentration of H+ in mol dm–3 The pH scale is a logari...
IB DP Chemistry: HL复习笔记8.2.1 Acid-base Titrations
Acid-Base Titrations The steps involved in performing a titration and titration calculation are outlined in Topic 1.2.9 Titrations Acid-base titrations follow the same steps and are used to find th...
IB DP Chemistry: HL复习笔记8.1.4 Neutralization
Neutralization A neutralisation reaction is one in which an acid (pH <7) and a base/alkali (pH >7) react together to form water (pH = 7) and a salt The proton of the acid reacts with the hydr...
IB DP Chemistry: HL复习笔记8.1.3 Characteristic Reactions of Acids
Characteristic Reactions of Acids Metals and acids The typical reaction of a metal and an acid can be summarized as acid + metal → salt + hydrogen For example: 2HCl (aq) + Zn (s) → ...
IB DP Chemistry: HL复习笔记8.1.2 Conjugate Acid-Base Pairs
Conjugate Acid-Base Pairs A Brønsted-Lowry acid is a species that can donate a proton A Brønsted-Lowry base is a species that can accept a proton In a reaction equilibrium the products are formed a...
IB DP Chemistry: HL复习笔记8.1.1 Brønsted–Lowry Acids & Bases
Brønsted–Lowry Acids & Bases The Brønsted-Lowry Theory defines acids and bases in terms of proton transfer between chemical compounds A Brønsted-Lowry acid is a species that gives away a proton...
A-level人文学科有哪些？人文学科重要吗？
A-level人文学科重要吗？ 重要！ A-level人文学科虽然没有常规科目选的人多，但在申请大学时很多专业是有指定要求的。 A-level心理学 大学心理学学位不要求必须学习过A-level Psychology。很多专业要求一门scienc...
