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Metody a techniky oddělování směsí látek
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Mechanické metody oddělování
Filtrování je asi nejjednodušší způsob, jak oddělit nerozpustné částice od kapaliny. Funguje to stejně jako když si děláš kávu - voda projde filtrem, ale kávová sedlina v něm zůstane. Filtr prostě zachytí všechno, co se v kapalině nerozpustilo.
Prosévání používáš pokaždé, když chceš oddělit větší kusy od menších. Větší částice zůstanou v sítu a menší propadnou skrz - třeba když oddělujete kamínky od písku nebo mouky.
Ruční třídění je úplně nejjednodušší metoda - prostě vyberem to, co nechci. Používá se hlavně tam, kde dokážeš jednotlivé složky dobře rozeznat očima.
Tip: Filtrování funguje jen na nerozpustné látky - sůl nebo cukur filtrem projdou!
Sedimentace, dekantace a odstřeďování
Sedimentace znamená nechat směs v klidu, aby se těžší částice usadily na dně nádoby. Je to jako když necháš zakalou vodu stát - špína se postupně usadí dole a nahoře bude čistší voda.
Dekantace následuje hned po sedimentaci. Opatrně sleješ čistou kapalinu z vrchu, zatímco usazenina zůstane na dně. Musíš být opatrný, aby ses do usazeniny nedostal.
Odstřeďování funguje jako odstředivka v pračce - rychlé otáčení vytvoří sílu, která odtlačí těžší látky směrem ven. V laboratoři se tak oddělují třeba různé složky krve nebo se z mléka získává smetana.
Zajímavost: Odstřeďování dokáže urychlit proces, který by sedimentací trval hodiny!
Tepelné a chemické metody
Odpařování využívá teplo k tomu, aby se kapalina (většinou voda) přeměnila na páru a odešla. Zůstanou po ní jen pevné látky, které byly rozpuštěné - například sůl z mořské vody.
Destilace je složitější proces, který dokáže oddělit i různé kapaliny od sebe. Využívá toho, že každá látka se vaří při jiné teplotě. Směs se zahřeje, odpařuje se postupně a pak se páry zase ochladí zpátky na kapalinu.
Extrakce funguje na principu "podobné rozpouští podobné". Přidáš takové rozpouštědlo, které rozpustí jen tu látku, kterou chceš získat. Ostatní složky zůstanou nerozpuštěné.
Absorpce používá speciální materiály (jako aktivní uhlí), které dokážou zachytit nečistoty na svém povrchu. Proto fungují plynové masky nebo filtry na čištění vody.
Pro test: Zapamatuj si, že destilace odděluje látky podle bodu varu!
Shrnutí a volba správné metody
Každá metoda funguje na jiném principu a hodí se na jiný typ směsi. Filtrování použiješ na nerozpustné částice, prosévání na částice různých velikostí, destilaci na kapaliny s různými body varu.
Klíčové je poznat vlastnosti látek ve směsi - jejich velikost, rozpustnost, hustotu nebo bod varu. Podle toho si vybereš tu nejlepší metodu.
V praxi se často kombinuje víc metod najednou. Například při čištění vody se může použít sedimentace, filtrace i absorpce současně.
Praktický tip: Pro test si zapamatuj hlavní využití každé metody - často se ptají na konkrétní příklady!
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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Most popular content in Chemie
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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
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
Metody a techniky oddělování směsí látek
Představ si, že máš před sebou směs písku a soli - jak je od sebe oddělíš? Oddělování směsí látek je důležitá chemická dovednost, kterou používáme nejen v laboratoři, ale i v běžném životě. Existuje spousta metod, jak rozdělit směsi na... Show more
Mechanické metody oddělování
Filtrování je asi nejjednodušší způsob, jak oddělit nerozpustné částice od kapaliny. Funguje to stejně jako když si děláš kávu - voda projde filtrem, ale kávová sedlina v něm zůstane. Filtr prostě zachytí všechno, co se v kapalině nerozpustilo.
Prosévání používáš pokaždé, když chceš oddělit větší kusy od menších. Větší částice zůstanou v sítu a menší propadnou skrz - třeba když oddělujete kamínky od písku nebo mouky.
Ruční třídění je úplně nejjednodušší metoda - prostě vyberem to, co nechci. Používá se hlavně tam, kde dokážeš jednotlivé složky dobře rozeznat očima.
Tip: Filtrování funguje jen na nerozpustné látky - sůl nebo cukur filtrem projdou!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Sedimentace, dekantace a odstřeďování
Sedimentace znamená nechat směs v klidu, aby se těžší částice usadily na dně nádoby. Je to jako když necháš zakalou vodu stát - špína se postupně usadí dole a nahoře bude čistší voda.
Dekantace následuje hned po sedimentaci. Opatrně sleješ čistou kapalinu z vrchu, zatímco usazenina zůstane na dně. Musíš být opatrný, aby ses do usazeniny nedostal.
Odstřeďování funguje jako odstředivka v pračce - rychlé otáčení vytvoří sílu, která odtlačí těžší látky směrem ven. V laboratoři se tak oddělují třeba různé složky krve nebo se z mléka získává smetana.
Zajímavost: Odstřeďování dokáže urychlit proces, který by sedimentací trval hodiny!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Tepelné a chemické metody
Odpařování využívá teplo k tomu, aby se kapalina (většinou voda) přeměnila na páru a odešla. Zůstanou po ní jen pevné látky, které byly rozpuštěné - například sůl z mořské vody.
Destilace je složitější proces, který dokáže oddělit i různé kapaliny od sebe. Využívá toho, že každá látka se vaří při jiné teplotě. Směs se zahřeje, odpařuje se postupně a pak se páry zase ochladí zpátky na kapalinu.
Extrakce funguje na principu "podobné rozpouští podobné". Přidáš takové rozpouštědlo, které rozpustí jen tu látku, kterou chceš získat. Ostatní složky zůstanou nerozpuštěné.
Absorpce používá speciální materiály (jako aktivní uhlí), které dokážou zachytit nečistoty na svém povrchu. Proto fungují plynové masky nebo filtry na čištění vody.
Pro test: Zapamatuj si, že destilace odděluje látky podle bodu varu!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Shrnutí a volba správné metody
Každá metoda funguje na jiném principu a hodí se na jiný typ směsi. Filtrování použiješ na nerozpustné částice, prosévání na částice různých velikostí, destilaci na kapaliny s různými body varu.
Klíčové je poznat vlastnosti látek ve směsi - jejich velikost, rozpustnost, hustotu nebo bod varu. Podle toho si vybereš tu nejlepší metodu.
V praxi se často kombinuje víc metod najednou. Například při čištění vody se může použít sedimentace, filtrace i absorpce současně.
Praktický tip: Pro test si zapamatuj hlavní využití každé metody - často se ptají na konkrétní příklady!
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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Most popular content: Properties of Matter
Most popular content in Chemie
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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
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