Synthèse de Cannizzaro, bac Métropole 2021.

En poursuivant votre navigation sur ce site, vous acceptez l’utilisation de Cookies vous proposant des publicités adaptées à vos centres d’intérêts.

.. ..


.
.
.. ..
......


...

Scott Astroworld Disaster Fixed: Travis

Investigations by journalists, local authorities, and safety experts revealed a cascade of structural and operational failures that contributed to the disaster. 1. Flawed Site Layout and Crowd Management

Many private security guards hired for the event lacked proper training in crowd management, communication protocols, and emergency response.

The investigation into the disaster revealed a series of failures and mistakes that led to the tragedy. The event organizers, including Travis Scott and his team, were accused of ignoring safety protocols and warnings from officials. The venue, NRG Park, was also criticized for its inadequate safety measures and insufficient staffing. The investigation also revealed that the crowd was not properly managed, and that the event staff and security were not prepared to handle the large number of attendees. travis scott astroworld disaster

Eliminating bureaucratic loopholes between city and county jurisdictions to ensure uniform safety checks.

: A physical infrastructure intervention that places designated safe zones at festivals and concerts, giving attendees a place to step away if they feel overwhelmed, anxious, or overstimulated. The investigation into the disaster revealed a series

The Travis Scott Astroworld disaster remains a sobering reminder of the critical importance of crowd dynamics, rigorous event planning, and corporate accountability in the live music industry.

The other victims included: John Hilgert, 14; Brianna Rodriguez, 16; Franco Patiño, 21; Jacob "Jake" Jurinek, 21; Axel Acosta Avila, 21; Bharti Shahani, 22; Rodolfo "Rudy" Peña, 23; Madison Dubiski, 23; and Danish Baig, 27. The Harris County medical examiner ruled that all 10 victims died from compression asphyxia—essentially, they were crushed to the point where they could no longer breathe. As one expert grimly described it, the experience was akin to being crushed by a car. The investigation also revealed that the crowd was

: Travis Scott takes the stage. The crowd surge intensifies immediately.

In response to the disaster, multiple investigations were launched:

At 9:07 p.m., panic began to spread, and people in the crowd were already in need of medical attention. Within four minutes, at 9:11 p.m., the first 911 call was placed from someone inside the crowd. At 9:18 p.m., additional security breaches occurred as a group jumped a fence, creating further distractions for emergency responders.

...
....


3.1. Effectuer un schéma légendé de l'ampoule à décanter en précisant les phases présentes et leurs compositions respectives après décantation.

travis scott astroworld disaster
3.2. Justifier le choix de l'éther éthylique.
L'eau et l'éther ne sont pas miscibles.
Le produit A, alcool benzylique, est très soluble dans l'ether et très peu soluble dans l'eau.
Le produit B, ion benzoate, est très soluble dans l'eau et insoluble dans l'éther.
3.3. Justifier que l'on veuille obtenir un pH inférieur à 2 pour la phase aqueuse.
pKa( acide benzoïque / ion benzoate = 4,2.
A pH < 2, l'acide benzoïque prédomine et celui-ci est insoluble dans l'eau.
3.4. Donner l'intérêt du bain de glace et d'eau.
La température de ce bain est égale à 0°C. La solubilité de l'acide benzoïque est très faible à °C.
3.5. Citer une technique permettant d'isoler le produit B de la phase aqueuse.
Filtration sur büchner.
3.6. En utilisant le chromatogramme, conclure sur l'efficacité de l'étape de séparation des produits.
3.7. En utilisant le chromatogramme, conclure sur la pureté des produits.
Le produit A n'est pas pur : il contient du benzaldehyde et de l'alcool benzylique.
Le produit B est pur, on l'identifie à l'acide benzoïque.


  
menu