Osmoralité

[tom77380]

BOnjour à tous, voici l'énoncé du problême :

Une membrane uniquement perméable à l'eau sépare initialement en 2 parties égales un récipient dylindrique de volume total V = 26 L, et de section S = 100 cm². On dissout m1 = 23,2 g de NACL dans le compartiment 1 et m2 = 66g de CaCl2 dans le compartiment 2. La membrane est libre et se déplace sans frottements.

1) Les 2 composés se disolvent. combien de molécules de chaques susbtances correspondent aux masses m1 et m2 ?

2) Exprimer la préssion osmotique dans chaque compartiment.

3) Calculer la position d'équilibre de la membrane.

Données Mca = 40 g Mna = 23g Mcl = 35,5 g

1) j'ai calculé en utilisant la formule n = m/M et j'ai trouvé Nnacl = 3,9 10^-1 et Ncacl2 = 5,9.10^-1

2) Alors là j'ai un gros doute, deja je dois convertis en mol/m cube ce qui me fait donc 390 et 590, ensuite comme sa se dissout, je dois multiplier la concentration par 2 non ? la formule était P osmotique = cRT

MOn problême est pour calculer ce fameux c je suis vraiment perdu, et la température, je supore qu'on prends 25° soit 298 K, la température ambiante.

Merci à vous

[tom77380]

Un grand merci à toi Quidam, en effet on me demandait le nombre de molécule et mes calculs sont éronnés, idem pour les simplifications...

Merci à toi d'avoir pris le temps de me répondre, et de concevoir une réponse aussi complète et précise, j'ai réussi tout l'éxercice en grande partie grace à toi.

" Toute ma science a été acquise il y a dix minutes, lorsque j'ai consulté Wikipédia !"

Alors là chapeau !

Bonne soirée et merci encore :)

[Wrafrurry]

Using a multitenant CRM alternative, Microsoft Dynamics CRM presents any amount of deployment alternatives, dependant upon your wants. On-demand, on-premise, and partner-hosted designs can be found for Microsoft Dynamic CRM. In case your deployment specifications alter so as well can your CRM application deployment selections as each and every deployment alternative is constructed around the very same modern day architecture and information model. By way of example, you could take your configurations and information hosted by Microsoft and move to In-House or to a Microsoft Companion internet primarily based CRM program hosted model. Salesforce platform gives you SaaS from the Cloud and also you do not personal the program and configurations. In order to alter to an in-house alternative you require to move to one more CRM software. You will need to component the price of finding your information from Salesforce. Based on the degree of subscription you buy for Salesforce there have already been reports of one's information currently being held hostage. This really is, dependant upon your degree of subscription you may need to update your subscription to be able to export your information. http://www.articlecupboard.net/Art/547786/271/Effortless-CRM-Software-Methods-A-Closer-Look.html In case your organization employs other-open supply equipment like PHP or ZEND, or when you run your techniques on Linux and use mySQL databases, it truly is crucial that you just ensure that the CRM software program vendor you select for the United kingdom business utilizes software program that may be compatible with all the rest of one's infrastructure. Inside a planet that more and more lends itself in the direction of multi-instance virtualization getting a CRM program answer that simply integrates with latest engineering will successfully make your company's CRM software program techniques future-proof. In case you have ever worked in an atmosphere the place you shell out quite a few many years continually feeling as if you as well as your entire group are regularly taking part in catch-up you'll straight away understand how beneficial this will be for each United kingdom and international enterprises. http://www.online-informatie.net/kunst-en-cultuur/exploring-practical-plans-of-crm-software Whenever a new consumer is generated during the method, what ever interaction with that consumer is accomplished it can be recorded for the consumer file. An illustration could be an issue that a consumer has, that couldn't be concluded instantly. For example, whenever a consumer telephones right into a contact center and includes a dilemma that may perhaps get in touch with to get a fair measure of time as well as a quantity of experts from numerous departments, this issue for the consumer can simply be managed by CRM. The contact center agent would register the issue reported from the consumer to the CRM technique. One more employee from a unique division would come across any exceptional troubles marked for their division, and can be privy about that customer's matter by utilizing the CRM procedure. In the event the issue is resolved, the resolution is talked about around the client's record plus the client would then be contacted by that employee. If on the other hand the issue is just not concluded than that stated employee can make a discover and send it to yet another division that she or he thinks can resolve the issue. This method continues till the customer's worries are concluded. That is just a single very good instance of what practically most CRM laptop software package are capable of doing.