General chemistry

General chemistry

Industrie : Chimie

Contributors in Chimie générale

General chemistry

The first law states that energy cannot be created or destroyed. Many equivalent statements are possible, including: Internal energy changes depend only on the initial and final states of the system, ...

oxygene

Chimie; Chimie générale

Element 8, atomic weight 15.9994, a colorless, odorless gas that makes up about 1/5 of the earth's atmosphere and (in combined form) 8/9ths of earth's oceans and almost half of the earth's crust. The ...

couche de valence

Chimie; Chimie générale

Coque correspond à la valeur la plus élevée du nombre quantique principal dans l'atome. Les électrons de valence dans ce shell sont en moyenne plus éloigné du noyau que d'autres électrons ; ils sont ...

titrage complexometrique

Chimie; Chimie générale

A titration based on a reaction between a ligand and a metal ion to form a complex. For example, free Ca2+ in milk powder can be determined by titrating a milk powder sample with EDTA solution, ...