Kisline in baze so povsod okoli nas - od limoninega... Show more
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Updated Mar 28, 2026
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Osnove kislin, baz in pH vrednosti
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Uvod v kisline in baze
Vsak dan se srečuješ s snovmi, ki so kisle, bazične ali nevtralne, le tega morda ne veš. Kislina je snov s kiselim okusom (kot limona) in pH manjšim od 7. Baza ali lug pa je snov z grenkim okusom, ki je spolzka na otip (kot milo) in ima pH večji od 7.
Nevtralne snovi imajo pH točno 7, najboljši primer je čista voda. Indikatorji so prave male čarovnije kemije - snovi, ki spremenijo barvo, ko pridejo v stik s kislino ali bazo.
pH lestvica je tvoj najboljši prijatelj pri razumevanju kislosti. Gre od 0 do 14, kjer 7 pomeni nevtralno. Nevtralizacija se zgodi, ko kislina sreča bazo - njuni učinki se izničijo in nastaneta sol ter voda.
Pomembno: Nikoli ne poskušaj neznanih snovi - nekatere kisline in baze so zelo nevarne!
Lastnosti kislin in baz
Kisline prepoznaš po tem, da obarvajo moder lakmusov papir rdeče. Nekatere reagirajo z kovinami in sproščajo plin vodik. Iz vsakdanjega življenja poznaš limonin sok, kis, Coca-Colo in želodčno kislino.
Baze so popolnoma drugačne - obarvajo rdeč lakmus modro in so milnate na otip. V gospodinjstvu jih najdeš v milu, prašku za pranje in sodi bikarboni. Močne baze, kot so čistila za odtoke, so izjemno nevarne.
pH lestvica deluje tako, da nižje kot je število, močnejša je kislina. Višje kot je število nad 7, močnejša je baza. Pomembna finta: lestvica je logaritemska, kar pomeni, da je snov s pH 4 desetkrat bolj kisla kot snov s pH 5.
Nasvet za test: Zapomni si "KBMR" - Kislina Barvа Moder lakmus Rdeče!
pH lestvica in indikatorji
pH lestvica gre od 0 (najkislejše) do 14 (najbolj bazično). Akumulatorska kislina ima pH okoli 0, limonin sok okoli 2, voda točno 7, soda bikarbona okoli 9, čistila za odtoke pa kar 13 ali 14.
Indikatorji ti pomagajo določiti pH brez računanja. Lakmusov papir je najpreprostejši - moder postane rdeč v kislini, rdeč pa moder v bazi. Univerzalni indikator je še bolj natančen in pokaže različne barve od rdeče do vijolične.
Zanimiv domači indikator je sok rdečega zelja! V kislini postane roza, v bazi zelenkast, v nevtralni snovi pa ostane vijolična.
Finta za učenje: Logaritemska lestvica pomeni, da je vsaka stopnja desetkrat močnejša od prejšnje!
Nevtralizacija in primeri
Nevtralizacija je kemijska reakcija, kjer kislina plus baza da sol plus vodo. To ni le šolska snov - uporabljaš jo, ko vzameš zdravilo za zago (baza nevtralizira želodčno kislino) ali ko nanesešs sodo bikarbono na čebeli pik.
Praktični primeri ti pomagajo razumeti: jabolčni sok ima pH 3-4 (kislo), milnica pH 9-10 (bazično), destilirana voda pH 7 (nevtralno), čistilo za pečice pa pH 13 (močno bazično).
Pri mravljinčjem piku mravlja vbrizga mravljično kislino. Rešitev? Pasta iz sode bikarbone in vode! Baza nevtralizira kislino in pekoč občutek izgine.
Varnostno opozorilo: Pri delu z močnimi kislinami in bazami vedno uporabi zaščitna očala in rokavice!
Hiter pregled za test
Za uspešno oceno si zapomni: kisline imajo pH < 7 in obarvajo moder lakmus rdeče, baze imajo pH > 7 in obarvajo rdeč lakmus modro, nevtralne snovi pa imajo pH = 7.
Nevtralizacijska enačba je tvoja zlata vrednost: KISLINA + BAZA → SOL + VODA. To velja vedno, ne glede na to, katero kislino ali bazo uporabljaš.
Močne kisline in baze (čistila, akumulatorska kislina) so nevarne in jedke. Šibke pa najdeš v hrani in so relativno varne. Vedno preveri, s čim delaš!
Zadnji nasvet: pH lestvica od 0-6 = kislo, 7 = nevtralno, 8-14 = bazično. Preprosto!
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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.
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Best app on earth! no words because it’s too good
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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
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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!
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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
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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
Osnove kislin, baz in pH vrednosti
Kisline in baze so povsod okoli nas - od limoninega soka v kuhinji do mila v kopalnici. Razumevanje pH lestvice ti bo pomagalo razumeti, zakaj nekatere snovi pečejo, druge pa so spolzke na otip.
Uvod v kisline in baze
Vsak dan se srečuješ s snovmi, ki so kisle, bazične ali nevtralne, le tega morda ne veš. Kislina je snov s kiselim okusom (kot limona) in pH manjšim od 7. Baza ali lug pa je snov z grenkim okusom, ki je spolzka na otip (kot milo) in ima pH večji od 7.
Nevtralne snovi imajo pH točno 7, najboljši primer je čista voda. Indikatorji so prave male čarovnije kemije - snovi, ki spremenijo barvo, ko pridejo v stik s kislino ali bazo.
pH lestvica je tvoj najboljši prijatelj pri razumevanju kislosti. Gre od 0 do 14, kjer 7 pomeni nevtralno. Nevtralizacija se zgodi, ko kislina sreča bazo - njuni učinki se izničijo in nastaneta sol ter voda.
Pomembno: Nikoli ne poskušaj neznanih snovi - nekatere kisline in baze so zelo nevarne!
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Lastnosti kislin in baz
Kisline prepoznaš po tem, da obarvajo moder lakmusov papir rdeče. Nekatere reagirajo z kovinami in sproščajo plin vodik. Iz vsakdanjega življenja poznaš limonin sok, kis, Coca-Colo in želodčno kislino.
Baze so popolnoma drugačne - obarvajo rdeč lakmus modro in so milnate na otip. V gospodinjstvu jih najdeš v milu, prašku za pranje in sodi bikarboni. Močne baze, kot so čistila za odtoke, so izjemno nevarne.
pH lestvica deluje tako, da nižje kot je število, močnejša je kislina. Višje kot je število nad 7, močnejša je baza. Pomembna finta: lestvica je logaritemska, kar pomeni, da je snov s pH 4 desetkrat bolj kisla kot snov s pH 5.
Nasvet za test: Zapomni si "KBMR" - Kislina Barvа Moder lakmus Rdeče!
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pH lestvica in indikatorji
pH lestvica gre od 0 (najkislejše) do 14 (najbolj bazično). Akumulatorska kislina ima pH okoli 0, limonin sok okoli 2, voda točno 7, soda bikarbona okoli 9, čistila za odtoke pa kar 13 ali 14.
Indikatorji ti pomagajo določiti pH brez računanja. Lakmusov papir je najpreprostejši - moder postane rdeč v kislini, rdeč pa moder v bazi. Univerzalni indikator je še bolj natančen in pokaže različne barve od rdeče do vijolične.
Zanimiv domači indikator je sok rdečega zelja! V kislini postane roza, v bazi zelenkast, v nevtralni snovi pa ostane vijolična.
Finta za učenje: Logaritemska lestvica pomeni, da je vsaka stopnja desetkrat močnejša od prejšnje!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Nevtralizacija in primeri
Nevtralizacija je kemijska reakcija, kjer kislina plus baza da sol plus vodo. To ni le šolska snov - uporabljaš jo, ko vzameš zdravilo za zago (baza nevtralizira želodčno kislino) ali ko nanesešs sodo bikarbono na čebeli pik.
Praktični primeri ti pomagajo razumeti: jabolčni sok ima pH 3-4 (kislo), milnica pH 9-10 (bazično), destilirana voda pH 7 (nevtralno), čistilo za pečice pa pH 13 (močno bazično).
Pri mravljinčjem piku mravlja vbrizga mravljično kislino. Rešitev? Pasta iz sode bikarbone in vode! Baza nevtralizira kislino in pekoč občutek izgine.
Varnostno opozorilo: Pri delu z močnimi kislinami in bazami vedno uporabi zaščitna očala in rokavice!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
Hiter pregled za test
Za uspešno oceno si zapomni: kisline imajo pH < 7 in obarvajo moder lakmus rdeče, baze imajo pH > 7 in obarvajo rdeč lakmus modro, nevtralne snovi pa imajo pH = 7.
Nevtralizacijska enačba je tvoja zlata vrednost: KISLINA + BAZA → SOL + VODA. To velja vedno, ne glede na to, katero kislino ali bazo uporabljaš.
Močne kisline in baze (čistila, akumulatorska kislina) so nevarne in jedke. Šibke pa najdeš v hrani in so relativno varne. Vedno preveri, s čim delaš!
Zadnji nasvet: pH lestvica od 0-6 = kislo, 7 = nevtralno, 8-14 = bazično. Preprosto!
Sign up to see the contentIt's free!
Access to all documents
Improve your grades
Join milions of students
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.
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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
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