Molska koncentracija je eden najpomembnejših načinov za merjenje "moči" raztopin... Show more
Kemija
Matematika
Angleščina
GeografijaSign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
13
•
Updated Apr 18, 2026
•
Molarnost raztopin - Enostavno razloženo
1 / 7
Kaj je molska koncentracija?
Verjetno si že kdaj pomešal/-a sok z vodo - dodal/-a si več vode, da je postal manj sladek, ali manj vode, da je ostal močnejši. Molska koncentracija deluje podobno, le da natančno izmeri to razmerje.
Raztopina je zmes topila (običajno voda) in topljenca (snov, ki jo raztapljamo). Molska koncentracija nam pove, koliko molov topljenca je v enem litru celotne raztopine.
💡 Pomni: Molska koncentracija se označi s črko c in ima enoto mol/L (ali M). Raztopina z 1 mol/L je "enomolarna" raztopina.
Osnovna formula je preprosta: c = n/V, kjer je n količina topljenca v molih, V pa volumen raztopine v litrih.
Osnovna formula in izračuni
Glavna formula za molsko koncentracijo je: c = n/V. Tu je c koncentracija, n množina snovi v molih, V pa volumen v litrih.
Če pa imaš podano maso namesto molov, moraš najprej izračunati število molov z n = m/M. Tu je m masa v gramih, M pa molska masa v g/mol.
⚠️ Pozor: Volumen mora biti VEDNO v litrih! 1000 mL = 1 L.
Molsko maso dobiš tako, da sešteješ vse atomske mase iz periodnega sistema. Za NaCl: Na (23) + Cl (35,5) = 58,5 g/mol.
Priprava raztopine v praksi
Ko pripravljaš raztopino, ne smeš samo dodati topljenca v določen volumen vode. Postopek je drugačen!
Najprej raztopiti topljenec v manjši količini topila, nato pa v merilni bučki dopolniti z vodo do želene oznake. Tako dobiš natančen končni volumen.
🔬 V laboratoriju: Vedno najprej raztopi, šele nato dopolni do oznake!
Ta postopek zagotovi, da imaš res natančen volumen celotne raztopine, kar je ključno za pravilne izračune koncentracije.
Rešeni primeri korak za korakom
Primer 1: V 0,5 L raztopine je 0,2 mol NaCl. Kolikšna je koncentracija? Preprosto: c = 0,2 mol / 0,5 L = 0,4 mol/L
Primer 2: 20 g NaOH v 500 mL raztopine.
- Pretvori: 500 mL = 0,5 L
- Molska masa NaOH: 23 + 16 + 1 = 40 g/mol
- Molov: n = 20 g / 40 g/mol = 0,5 mol
- Koncentracija: c = 0,5 mol / 0,5 L = 1,0 mol/L
💪 Lahko je: Vedno sledi istemu vrstnemu redu - podatki, enote, molska masa, molov, koncentracija.
Te korake uporabi za vsak izračun in ne moreš zgrešiti!
Koliko snovi potrebujem?
Včasih moraš izračunati, koliko gramov snovi potrebuješ za določeno koncentracijo. Postopek je obraten!
Primer: Pripraviti 2 L raztopine CuSO₄ z 0,25 mol/L.
- Molov potrebujem: n = c × V = 0,25 × 2 = 0,5 mol
- Molska masa CuSO₄: 63,5 + 32,1 + (4 × 16) = 159,6 g/mol
- Masa: m = n × M = 0,5 × 159,6 = 79,8 g
🎯 Trik: Uporabi formulo n = c × V, ko iščeš množino snovi.
S tem pristopom lahko pripraviš katero koli raztopino z želeno koncentracijo.
Najpogostejše napake in nasveti
Glavne pasti, ki se jim izogni:
- Volumen MORA biti v litrih (ne v mL!)
- Pozor na razliko med volumnom topila in volumnom raztopine
- Molska masa - naučiti se moraš izračunati iz periodnega sistema
Formulni trikotnik ti lahko pomaga zapomniti povezave: postavi n na vrh, c in V spodaj. Pokrij tisto, kar iščeš!
✅ Kontrolni seznam: Podatki → enote → molska masa → molov → koncentracija
Če vedno slediš temu vrstnemu redu, boš uspešen/-a pri vseh izračunih. Te formule potrebuješ za maturo in študij!
Hitra ponovitev za teste
Ključne formule:
- c = n/V (osnovna formula)
- n = m/M (če imaš maso)
- n = c × V (ko iščeš množino)
Enote: c v mol/L, n v mol, V v L, m v g, M v g/mol
📚 Za teste: Te tri formule in pravilne enote so 90% uspeha!
Postopek: Vedno začni s podatki, preveri enote, izračunaj molsko maso, nato molov in na koncu koncentracijo. Z vajo postane avtomatsko!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
Most popular content in Kemija
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
Molarnost raztopin - Enostavno razloženo
Molska koncentracija je eden najpomembnejših načinov za merjenje "moči" raztopin v kemiji. Pove nam, koliko molov neke snovi je raztopljene v enem litru raztopine - podatek, ki ga potrebuješ za skoraj vsak kemijski izračun.
Kaj je molska koncentracija?
Verjetno si že kdaj pomešal/-a sok z vodo - dodal/-a si več vode, da je postal manj sladek, ali manj vode, da je ostal močnejši. Molska koncentracija deluje podobno, le da natančno izmeri to razmerje.
Raztopina je zmes topila (običajno voda) in topljenca (snov, ki jo raztapljamo). Molska koncentracija nam pove, koliko molov topljenca je v enem litru celotne raztopine.
💡 Pomni: Molska koncentracija se označi s črko c in ima enoto mol/L (ali M). Raztopina z 1 mol/L je "enomolarna" raztopina.
Osnovna formula je preprosta: c = n/V, kjer je n količina topljenca v molih, V pa volumen raztopine v litrih.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Osnovna formula in izračuni
Glavna formula za molsko koncentracijo je: c = n/V. Tu je c koncentracija, n množina snovi v molih, V pa volumen v litrih.
Če pa imaš podano maso namesto molov, moraš najprej izračunati število molov z n = m/M. Tu je m masa v gramih, M pa molska masa v g/mol.
⚠️ Pozor: Volumen mora biti VEDNO v litrih! 1000 mL = 1 L.
Molsko maso dobiš tako, da sešteješ vse atomske mase iz periodnega sistema. Za NaCl: Na (23) + Cl (35,5) = 58,5 g/mol.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Priprava raztopine v praksi
Ko pripravljaš raztopino, ne smeš samo dodati topljenca v določen volumen vode. Postopek je drugačen!
Najprej raztopiti topljenec v manjši količini topila, nato pa v merilni bučki dopolniti z vodo do želene oznake. Tako dobiš natančen končni volumen.
🔬 V laboratoriju: Vedno najprej raztopi, šele nato dopolni do oznake!
Ta postopek zagotovi, da imaš res natančen volumen celotne raztopine, kar je ključno za pravilne izračune koncentracije.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Rešeni primeri korak za korakom
Primer 1: V 0,5 L raztopine je 0,2 mol NaCl. Kolikšna je koncentracija? Preprosto: c = 0,2 mol / 0,5 L = 0,4 mol/L
Primer 2: 20 g NaOH v 500 mL raztopine.
- Pretvori: 500 mL = 0,5 L
- Molska masa NaOH: 23 + 16 + 1 = 40 g/mol
- Molov: n = 20 g / 40 g/mol = 0,5 mol
- Koncentracija: c = 0,5 mol / 0,5 L = 1,0 mol/L
💪 Lahko je: Vedno sledi istemu vrstnemu redu - podatki, enote, molska masa, molov, koncentracija.
Te korake uporabi za vsak izračun in ne moreš zgrešiti!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Koliko snovi potrebujem?
Včasih moraš izračunati, koliko gramov snovi potrebuješ za določeno koncentracijo. Postopek je obraten!
Primer: Pripraviti 2 L raztopine CuSO₄ z 0,25 mol/L.
- Molov potrebujem: n = c × V = 0,25 × 2 = 0,5 mol
- Molska masa CuSO₄: 63,5 + 32,1 + (4 × 16) = 159,6 g/mol
- Masa: m = n × M = 0,5 × 159,6 = 79,8 g
🎯 Trik: Uporabi formulo n = c × V, ko iščeš množino snovi.
S tem pristopom lahko pripraviš katero koli raztopino z želeno koncentracijo.
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Najpogostejše napake in nasveti
Glavne pasti, ki se jim izogni:
- Volumen MORA biti v litrih (ne v mL!)
- Pozor na razliko med volumnom topila in volumnom raztopine
- Molska masa - naučiti se moraš izračunati iz periodnega sistema
Formulni trikotnik ti lahko pomaga zapomniti povezave: postavi n na vrh, c in V spodaj. Pokrij tisto, kar iščeš!
✅ Kontrolni seznam: Podatki → enote → molska masa → molov → koncentracija
Če vedno slediš temu vrstnemu redu, boš uspešen/-a pri vseh izračunih. Te formule potrebuješ za maturo in študij!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Hitra ponovitev za teste
Ključne formule:
- c = n/V (osnovna formula)
- n = m/M (če imaš maso)
- n = c × V (ko iščeš množino)
Enote: c v mol/L, n v mol, V v L, m v g, M v g/mol
📚 Za teste: Te tri formule in pravilne enote so 90% uspeha!
Postopek: Vedno začni s podatki, preveri enote, izračunaj molsko maso, nato molov in na koncu koncentracijo. Z vajo postane avtomatsko!
We thought you’d never ask...
What is the Knowunity AI companion?
Our AI Companion is a student-focused AI tool that offers more than just answers. Built on millions of Knowunity resources, it provides relevant information, personalised study plans, quizzes, and content directly in the chat, adapting to your individual learning journey.
Where can I download the Knowunity app?
You can download the app from Google Play Store and Apple App Store.
Is Knowunity really free of charge?
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
0
Smart Tools NEW
Transform this note into: ✓ 50+ Practice Questions ✓ Interactive Flashcards ✓ Full Mock Exam ✓ Essay Outlines
Mock Exam
Quiz
Flashcards
Essay
Most popular content in Kemija
Most popular content
Can't find what you're looking for? Explore other subjects.
Students love us — and so will you.
4.6/5
App Store
4.7/5
Google Play
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user
The app is very easy to use and well designed. I have found everything I was looking for so far and have been able to learn a lot from the presentations! I will definitely use the app for a class assignment! And of course it also helps a lot as an inspiration.
Stefan S
iOS user
This app is really great. There are so many study notes and help [...]. My problem subject is French, for example, and the app has so many options for help. Thanks to this app, I have improved my French. I would recommend it to anyone.
Samantha Klich
Android user
Wow, I am really amazed. I just tried the app because I've seen it advertised many times and was absolutely stunned. This app is THE HELP you want for school and above all, it offers so many things, such as workouts and fact sheets, which have been VERY helpful to me personally.
Anna
iOS user
Best app on earth! no words because it’s too good
Thomas R
iOS user
Just amazing. Let's me revise 10x better, this app is a quick 10/10. I highly recommend it to anyone. I can watch and search for notes. I can save them in the subject folder. I can revise it any time when I come back. If you haven't tried this app, you're really missing out.
Basil
Android user
This app has made me feel so much more confident in my exam prep, not only through boosting my own self confidence through the features that allow you to connect with others and feel less alone, but also through the way the app itself is centred around making you feel better. It is easy to navigate, fun to use, and helpful to anyone struggling in absolutely any way.
David K
iOS user
The app's just great! All I have to do is enter the topic in the search bar and I get the response real fast. I don't have to watch 10 YouTube videos to understand something, so I'm saving my time. Highly recommended!
Sudenaz Ocak
Android user
In school I was really bad at maths but thanks to the app, I am doing better now. I am so grateful that you made the app.
Greenlight Bonnie
Android user
very reliable app to help and grow your ideas of Maths, English and other related topics in your works. please use this app if your struggling in areas, this app is key for that. wish I'd of done a review before. and it's also free so don't worry about that.
Rohan U
Android user
I know a lot of apps use fake accounts to boost their reviews but this app deserves it all. Originally I was getting 4 in my English exams and this time I got a grade 7. I didn’t even know about this app three days until the exam and it has helped A LOT. Please actually trust me and use it as I’m sure you too will see developments.
Xander S
iOS user
THE QUIZES AND FLASHCARDS ARE SO USEFUL AND I LOVE Knowunity AI. IT ALSO IS LITREALLY LIKE CHATGPT BUT SMARTER!! HELPED ME WITH MY MASCARA PROBLEMS TOO!! AS WELL AS MY REAL SUBJECTS ! DUHHH 😍😁😲🤑💗✨🎀😮
Elisha
iOS user
This apps acc the goat. I find revision so boring but this app makes it so easy to organize it all and then you can ask the freeeee ai to test yourself so good and you can easily upload your own stuff. highly recommend as someone taking mocks now
Paul T
iOS user