Bonbon. 28 Gel hydroalcoolique
APP: Maitriser le vocabulaire du cours
VAL: Appliquer une relation entre des grandeurs physiques
Le gel hydroalcoolique
La formule de la solution hydroalcoolique développée
par
D. Pittet est mise à disposition par l'Organisation mondiale
de la santé. Le mélange de liquides est le suivant (pour
10 L finaux): 8,333 L d'éthanol à 96 %, 417 mL de solution
de peroxyde d'hydrogène à 3%, 174 g de glycérol à 98 % et
le reste est complété avec de l'eau distillée.
1. Identifier le solvant dans la composition du gel
hydroalcoolique.
2. Quelle masse d'éthanol à 96 % est utilisée pour 10 L
de solution ?
3. Déterminer la masse volumique (en g/L) du gel.
Données
Péthanol = 0,79 g. cm3;
.
- Peau
• P
peroxyde
stycérol = 1,3 g/mL;

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