MWX

کاربرد هایی از مولاریته و مولالیته

کاربرد هایی از مولاریته و مولالیته

1-بدست آوردن دمای جوش محلول(Tb)

همانطور که میدانیم ناخالصی ها باعث تغییر در نقطه جوش یک محلول یا ماده میشوند.

مثلا با اضافه کردن200g نمک به 5lit آب دمای جوش آب  °C 107 میشود.

اما برای بدست آوردن دمای جوش یک محلول باید از فرمول زیر پیش برویم:

(تغیراتی که حل شونده ایجاد میکند)ΔTb+(دمای جوش حلال)(T)=(دمای جوش محلول)(T)

kb=ΔTb(عدد افزایش دمای جوش حلال)×m(مولالیته)

نکته:kb(عدد افزایش دمای جوش حلال)عددی است که هر ماده ای آن را دارد و نشان میدهد که اگر یک گرم ناخالصی به آن اضافه شود جند درجه سانتی گراد دمایش بالا میرود.مثال:

1.86=kb(آّب)

0.7=kb(اتانول)

********************************************************

مثال :400g نمک را در 7lit آب حل میکنیم دمای جوش این محلول چند درجه سانتی گراد است؟

ΔTb+(حلالT)=(محلولT)

100°=(T)آب

kb=ΔTb(عدد افزایش دمای جوش حلال)×m(مولالیته)

0.31=0.17×1.86=ΔTb

1.86=kb(آّب)

m(مولالیته)=n÷m

(m)0.17=400÷70.6=n)(شکر)(C12H10O11)

دمای جوش محلول100.31=100+0.31=(محلولT)


2-بدست آوردن دمای ذوب یک محلول(T)

میدانیم با اضافه کردن ناخالصی به حلال هایی مانند آب دمای ذوب آن ها پایین می آید اما برای اینکه بفهمیم چند درجه از فرمول زیر استفاده میکنیم:

(ΔTf)-(حلالT)=(Tf محلول)

m X kf=ΔTf

نکته:(kf)هم همانند(kb) یک عدد است.عددی که نشان میدهد اگر یک گرم ناخالصی  به ماده اضافه شود دمای ذوبش چند درجه کم میشود.

مثال:

0.0821=kfآب

2.3=kfاتانول

***********************************************

مثال:

400g شکر را در 7lit آب میریزیم،نقطه ذوب این محلول چند درجه سانتی گراد است؟

(ΔTf)-(حلالT)=(Tf محلول)

0=Tfآب

m X kf=ΔTf

0.0821=kfآب

 شکر(m=(0.17m(مولالیته)

0.013=0.0821=×0.17=ΔTf

دمای ذوب محلول0.013-=0-0.013=T


3-فشار اسمزی:

واحد های فشار اسمزی:

1-اتمسفر(atm)

2-تور(torr)

atm×140=torr

torr÷140=atm

یکی از کاربرد های مولاریته به دست آوردن فشار اسمزی یک محلول است.

فشار اسمزی:میدانیم مولکولهای مواد میتوانند از یک غشای نیمه تراوا(نیمه نفوذ پذیر)رد شوند.به فشاری که باید به آن مولکول وارد کنیم که نتواند از غشای نیمه تراوا رد شود فشار اسمزی میگویند.

فشار اسمزی(π)از رابطه ی زیر به دست می آید:

M(مولاریته)R(ثابت جهانی گاز ها(0.0821))T(دمای محیط به کلوین)=π

*************************************************

مثال:

200g نمک را در 300g آب حل میکنیم فشار اسمزی این محلول چند اتمسفر است؟(دمای محیط400کلوین است)

π=MRT

R=0.0821

T=400K

M=n÷m

m=300g

n=98.4÷200=0.492mol

(M=0.492÷300=0.00144(NaCl

π=0.00144×0.0821×400=0.053atm

0.053×140=7.42torr


کاربرد هایی از مولاریته و مولالیته

امیرمحمدمحمدحسینی

اشتراک گذاریShare on FacebookBuffer this pageTweet about this on TwitterPrint this pageShare on TumblrShare on RedditShare on StumbleUponDigg thisFlattr the authorShare on LinkedInPin on PinterestEmail this to someoneShare on YummlyShare on VKShare on Google+

‏181 دیدگاه در نوشته‌ی “کاربرد هایی از مولاریته و مولالیته

  1. Ugg Outlet Online Store

    Thank you for that wise critique. Me & my neighbour were preparing to do some research about that. We obtained a excellent book on that matter from our local library and most books where not as influensive as your information. Im incredibly glad to see these information and facts which I was searching for a lengthy time.
    Ugg Outlet Online Store http://ugg.vidaaposvinte.com

  2. buy cole haan online

    I am on the 1st day of a auto detox diet plan. I haven’t had a activity to eat all day and I’m STARVING!! I cannot accede how individuals say that they did not feel ardent bold this. I’m aswell a bit bloodless and all-a-quiver and like I said, this is abandoned the anterior day. I’m not a abounding abandoned or huge eater either. I’m not complete how broadcast I wil last. At the ability of the day I am appetite myself which can’t be an able thing. I’ll try to stick at it though, I’m just avaricious that the blackout and weakness is traveling to carelessness or I will not acquire the adeptness to administer on my plan on Monday.
    buy cole haan online http://www.colehaan.online

  3. michael kors outlet online

    How is it that just anyone can write a weblog and get as popular as this? Its not like youve said something extremely impressive more like youve painted a fairly picture through an issue that you know nothing about! I dont want to sound mean, right here. But do you really think that you can get away with adding some pretty pictures and not definitely say anything?
    michael kors outlet online http://www.michaelkorsoutletcoupons.com

  4. fitflop outlet store

    Hey there! Really good posting! I happen to be a ordinary visitor to your site (somewhat more like addict :P) of this website sadly I had a problem. Im just not at all positive whether it is the right site to question, but youve got no spam comments. I get comments just like watch movies online on a regular basis. May you assist me? Thanks a bunch.
    fitflop outlet store http://www.fitfloponline.store

  5. buy cole haan online

    I would like to thank you for the endeavors you have made in writing this piece. I am trusting the same best work from you in the future as well. In fact your creative writing abilities has inspired me to start my own website now. Actually the blogging is spreading its wings rapidly. Your write up is a fine representative of it.
    buy cole haan online http://www.colehaan.online

  6. Luiz Gastão Bittencourt

    You’re so interesting! I do not believe I have read a single thing like that before. So great to find another person with original thoughts on this issue. Really.. thank you for starting this up. This web site is one thing that’s needed on the web, someone with a bit of originality!|

  7. cheap Sergio Rossi online

    I cherished up to youll obtain carried out proper here. The comic strip is tasteful, your authored material stylish. nonetheless, you command get got an impatience over that you want be turning in the following. ill definitely come more earlier again since precisely the same just about a lot continuously inside of case you shield this hike.
    cheap Sergio Rossi online http://www.cheapsergiorossi.online

  8. buy marmot online

    I am impressed, I have to say. Very seldom do I see a blog that is both educative and entertaining, and let me tell you, youve hit the nail on the head. Your idea is important; the matter is something that not a lot of people are talking intelligently about. Im very happy that I stumbled across this in my search for something relating to this.
    buy marmot online http://marmot.unilorites.com

  9. discount fjallraven jackets

    The new Zune browser is surprisingly good, but not as good as the iPods. It works well, but isnt as fast as Safari, and has a clunkier interface. If you occasionally plan on using the web browser thats not an issue, but if youre planning to browse the web alot from your PMP then the iPods larger screen and better browser may be important.
    discount fjallraven jackets http://www.fjallravenoutlet.cc

  10. cheap belstaff sale

    This is some good stuff. It took me some time to locate this blog but it was worth the time. I noticed this website was buried in google and not the first spot. This internet site has a lot of good stuff and it doesnt deserve to be burried in the searches like that. By the way Im going to save this site to my favorites.
    cheap belstaff sale http://belstaff.websila.us

  11. jimmy choo sale

    f many great things about your life and a choice which is usually a lot of times hard to obtain. When considering some factors, we might underrate it, postpone or proactively pursuing it. Anything at all it is, if we want a lot of progress, we need to develop a so called exclusive advanced development and growth set up.
    jimmy choo sale http://www.jimmychoosale.online

  12. Christmas michael kors

    Emergency foodstuff are the most up-to-date embellishments which may have grocery stores putting up their own varieties on their shelves. Theyre what individuals usually are calling ‘food upon demand’. By simply including water on the packet, foods fanatics can be able to sit a while and enjoy a new wholesome meal.
    Christmas michael kors http://www.apcsale.co.uk

  13. cheap Sergio Rossi

    Ive to say, I dont know if its the clashing colours or the unhealthy grammar, but this blog is hideous! I imply, I dont want to sound like a know-it-all or something, however may you will have possibly put slightly bit more effort into this subject. Its really interesting, however you dont characterize it properly in any respect, man. Anyway, in my language, there arent much good source like this.
    cheap Sergio Rossi http://sergiorossi.websila.us

  14. buy true religion

    How is it that just anybody can publish a weblog and get as popular as this? Its not like youve said something extremely impressive more like youve painted a quite picture through an issue that you know nothing about! I dont want to sound mean, here. But do you definitely think that you can get away with adding some quite pictures and not truly say something?
    buy true religion http://www.cheaptruereligion.online

  15. Pierre Hardy sale

    My panel creates just over 18 volts Hey Guys. Thanks for the solar info. I made a photo voltaic panel similar to you stated through the use of 36 cells in series. My panel provides just over 18 volts which is precisely what type I used to be after. Anyway, keep up the great work. This is now tremendous stuff. I have actually informed a couple of work mates about this and we are going to construct solar panels and market them for a neat profit. I will be able to allow you to understand how that goes too! Carl Mayne, Ontario, Canada
    Pierre Hardy sale http://www.cheappierrehardy.cc

  16. discount armani sale

    This is some enjoyable stuff. It took me a while to locate this website but it was worth the time. I noticed this page was buried in google and not the number one spot. This web site has a ton of nice stuff and it does not deserve to be burried in the search engines like that. By the way Im going to save this website to my favorites.
    discount armani sale http://www.armanioutlet.us

  17. dkny shop online

    Have you ever considered adding more videos for your blog page posts to keep the readers more entertained? I indicate I just read through the entire post of yours and it was fairly very good but since Im more of a visual learner,I observed that to be more helpful nicely let me understand how it turns out! I enjoy what you guys are always up also. This kind of clever operate and reporting! Keep up the excellent works guys Ive added you guys to my blogroll. This is a great post thanks for sharing this informative information.. I will pay a visit to your blog site regularly for some latest publish.
    dkny shop online http://www.dknyoutlet.online

  18. emu factory outlet

    Howdy, i learn your weblog sometimes and that i personal an analogous one and i was simply wondering should you get numerous spam feedback? In that case how do you forestall it, any plugin or anything you may advise? I get a lot recently it is driving me mad so any assistance may be very a lot appreciated. Anyway, in my language, there arent much good source like this.
    emu factory outlet http://www.emuoutlet.online

  19. LK Bennett outlet online

    I don’t usually post on blogs but had to on yours. You have a very easy to read writing style. I really enjoy posts about this topic, they give me a lot to reflect on. I don’t have time to read everything right now, I found this site when looking for something else on Yahoo, but I’ve bookmarked your homepage and will check back soon to see the latest thoughts.
    LK Bennett outlet online http://www.lkbennettoutlet.online

  20. hermes store

    I am so delighted to see this particular kind of content articles . I appreciate lots and hope to determine another terrific posts in your blog . I concur with most of the things you stated , and i adore the valuable points you revealed . With thanks lots and wish you the most effective with your internet web site.
    hermes store http://www.handbagsstyle.online

  21. emu store

    I must say, as considerably as I enjoyed reading what you had to say, I couldnt help but lose interest after a while. Its as if you had a good grasp around the topic matter, but you forgot to include your readers. Perhaps you should think about this from much more than one angle. Or maybe you shouldnt generalise so a lot. Its better if you think about what others may have to say instead of just going for a gut reaction to the subject. Think about adjusting your own believed process and giving others who may read this the benefit of the doubt.
    emu store http://emu.websila.us

  22. coach outlet store

    Just a fast hello and also to thank you for discussing your ideas on this web page. I wound up inside your weblog right after researching physical fitness connected issues on Yahoo guess I lost track of what I had been performing! Anyway I’ll be back once once more within the potential to test out your blogposts down the road. Thanks!
    coach outlet store http://www.coachoutletlocations.com

  23. Sergio Rossi shoes online

    How could i extend the range on the Wireless N router? I have an Xtreme N handheld router (Dlink). I need to extend the reach from the wireless signal. I discover how to do it for a new G signal. I want to find out how to do them for an N sign. Is it possible make use of regular N routers when repeaters. If so, just how do i configure them. Thanks for the information.
    Sergio Rossi shoes online http://www.cheapsergiorossi.online

  24. cheap north face

    Thank you for the sensible critique. Me & my neighbour were preparing to do a little analysis about that. We bought a very good e-book on that matter from our local library and most books the place not as influensive as your information. I am very glad to see such information which I was searching for a long time.This made very glad! Anyway, in my language, there usually are not a lot good supply like this.
    cheap north face http://www.northfacecheap.cc

پاسخ دهید

نشانی ایمیل شما منتشر نخواهد شد. بخش‌های موردنیاز علامت‌گذاری شده‌اند *

فروشگاه ام دبلیو ایکس رد کردن