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4e identifica/Caract

Test d'identification et de caractérisation d'une substance

Corps pur (définition) Substance n'ayant qu'un seul constituant (nom?)
Identifier un corps pur (2 techniques) 1. Par la masse volumique 2. Par les températures de changement d'état (techniques servant à ?)
Masse volumique (formule) (grandeur?)
Masse (définition) quantité de matière (nom?)
Masse (instrument ; unité) -> balance -> kilogramme (kg) (grandeur?)
Volume (définition) place que l'objet prend dans l'espace (nom?)
Volume (instrument ; unité) -> éprouvette graduée -> mètre cube (m3) ou litre (L) (grandeur?)
Masse volumique (définition) rapport entre la masse et le volume ou coefficient de proportionnalité entre la masse et le volume (nom?)
Distinguer un corps pur d'un mélange homogène (technique ?) lors d'un changement d'état : palier = corps pur pas de palier = mélange (permet de ?)
Acide Basique Neutre (valeur du pH) pH < 7 pH > 7 pH = 7 (type de solution ... ?)
Created by: eraxit