Molska koncentracija je eden najpomembnejših načinov za merjenje "moči" raztopin... Show more
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Updated Apr 18, 2026
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Molarnost raztopin - Enostavno razloženo
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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 specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the 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
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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
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
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
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
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
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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!
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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.
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Improve your grades
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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 specifically built for the needs of students. Based on the millions of content pieces we have on the platform we can provide truly meaningful and relevant answers to students. But its not only about answers, the companion is even more about guiding students through their daily learning challenges, with personalised study plans, quizzes or content pieces in the chat and 100% personalisation based on the students skills and developments.
Where can I download the Knowunity app?
You can download the app in the Google Play Store and in the 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.
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4.6/5
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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
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
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
I think it’s very much worth it and you’ll end up using it a lot once you get the hang of it and even after looking at others notes you can still ask your Artificial intelligence buddy the question and ask to simplify it if you still don’t get it!!! In the end I think it’s worth it 😊👍 ⚠️Also DID I MENTION ITS FREEE YOU DON’T HAVE TO PAY FOR ANYTHING AND STILL GET YOUR GRADES IN PERFECTLY❗️❗️⚠️
Thomas R
iOS user
Knowunity is the BEST app I’ve used in a minute. This is not an ai review or anything this is genuinely coming from a 7th grade student (I know 2011 im young) but dude this app is a 10/10 i have maintained a 3.8 gpa and have plenty of time for gaming. I love it and my mom is just happy I got good grades
Brad T
Android user
Not only did it help me find the answer but it also showed me alternative ways to solve it. I was horrible in math and science but now I have an a in both subjects. Thanks for the help🤍🤍
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
I found this app a couple years ago and it has only gotten better since then. I really love it because it can help with written questions and photo questions. Also, it can find study guides that other people have made as well as flashcard sets and practice tests. The free version is also amazing for students who might not be able to afford it. Would 100% recommend
Aubrey
iOS user
Best app if you're in Highschool or Junior high. I have been using this app for 2 school years and it's the best, it's good if you don't have anyone to help you with school work.😋🩷🎀
Marco B
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 app is phenomenal down to the correct info and the various topics you can study! I greatly recommend it for people who struggle with procrastination and those who need homework help. It has been perfectly accurate for world 1 history as far as I’ve seen! Geometry too!
Paul T
iOS user