Alkenes Alkenes are organic compounds made of carbons and hydrogens. Opposite to alkanes, which have the same components, the general formula of alkenes is not CnH2n+2. Into an alkene, two carbons are bound by a pi liaison (also called double liaison). The smaller alkene is the ethene CH2=CH2. To make this liaison, each carbon shares […]
Posts from March 2015
Chapitre 2a:réactions acides-bases
Dans ce module, nous allons examiner l’un des principaux types de réaction de la chimie. Les réactions peuvent effectivement être classés en trois grandes catégories : – réactions acides-bases -réactions d’oxydo-réduction(rédox) . -réactions de solubilité (de dissolution et de précipitation) Les deux derniers types de réaction seront vus dans d’autres sections de nos leçons. Ici nous […]
Chapitre 1:histoire de la chimie
Il est souvent utile d’étudier l’histoire et l’évolution de la science et de voir surtout les étapes les plus importantes de celle-ci dans chaque spécialité. C’ est ainsi que nous allons commencer nos cours sur la chimie. D’après ce qu’on sait, la chimie a commencé avec la découverte du feu qui est essentiellement la combustion […]
Chapter 3a: Organic chemistry, structure and names of alkanes
Organic chemistry is the chemistry of carbon and its compounds. Carbon is one element of the Mendeleev table among many others, so why is there a complete section of chemistry related to this particular element? Carbon has a valence of 4 and can thus bind with up to 4 other elements of the periodic table. […]
Chapter 2c: Neutralization and titration
Neutralization A neutralization reaction is the reaction occurring between an acid and a base forming a salt and water. Technically, the neutralisation is not a one step reaction in the sense that all the actions are not done simultaneously but step by step. The fist step is the dissociation of the acid and base from […]
Chapter 2b: Strength of acids and bases
The general definition of an acid is thus a compound releasing protons. However, all the acids don’t have the same strength or acidity. We can define two types of acids and bases: Strong acids and bases, and weak acids and bases. For more simplicity, we will focus on acids in this lesson but the principle is identical for […]