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5 Dec 2025

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Understanding Neutralisation Reactions

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Zainab

@zainab_02839

Ever wondered how to turn dangerous acids and alkalis into... Show more

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KS4
Lesson 6: Neutralisation and
salt production. Neutralisation reactions
When acids and alkalis react together they will NEUTRALISE
each o

Getting Started with Neutralisation

You're about to master one of chemistry's most important reactions! Neutralisation happens when acids and alkalis meet and cancel each other out, like mixing hot and cold water to get lukewarm.

Think of it as a chemical balancing act. The acid brings its harsh properties, the alkali brings its opposite harsh properties, and together they create something neutral - hence the name neutralisation.

Quick Tip: Remember that neutralisation literally means "making neutral" - turning two extreme substances into something harmless!

KS4
Lesson 6: Neutralisation and
salt production. Neutralisation reactions
When acids and alkalis react together they will NEUTRALISE
each o

How Neutralisation Actually Works

Here's where the magic happens: when sodium hydroxide (an alkali) meets hydrochloric acid, they swap partners like a chemical dance. The sodium kicks out the hydrogen and takes its place with the chlorine.

What you end up with is sodium chloride (that's table salt!) and water. Pretty amazing that two dangerous chemicals can create something you put on your chips, right?

The key thing to remember is that the metal from the alkali always replaces the hydrogen from the acid. It's like a chemical game of musical chairs where the hydrogen always loses its seat.

Real-World Connection: This same process happens in your stomach when you take antacid tablets to neutralise excess stomach acid!

KS4
Lesson 6: Neutralisation and
salt production. Neutralisation reactions
When acids and alkalis react together they will NEUTRALISE
each o

The Universal Formula and Ion Action

Every neutralisation follows the same pattern: Alkali + Acid → Salt + Water. This formula is your best friend for any neutralisation question you'll face.

Behind the scenes, it's all about ions doing their thing. Acids release H⁺ ions whilst alkalis release OH⁻ ions. When these opposite ions meet, they grab onto each other and form water (H₂O).

The leftover bits themetalfromthealkaliandthenonmetalfromtheacidthe metal from the alkali and the non-metal from the acid pair up to form a salt. So you always get two products: water and a salt. Every single time, without fail.

Exam Success: Master this formula and you'll ace any neutralisation question - it never changes, no matter which acid and alkali you're dealing with!



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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.

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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.

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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.

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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 THE SCHOOLGPT. 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 THE SCHOOLGPT. 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

 

Chemistry

272

5 Dec 2025

3 pages

Understanding Neutralisation Reactions

user profile picture

Zainab

@zainab_02839

Ever wondered how to turn dangerous acids and alkalis into something harmless? Neutralisation reactions are your answer - they're the chemical equivalent of balancing opposites to create something completely different and safe.

KS4
Lesson 6: Neutralisation and
salt production. Neutralisation reactions
When acids and alkalis react together they will NEUTRALISE
each o

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

Getting Started with Neutralisation

You're about to master one of chemistry's most important reactions! Neutralisation happens when acids and alkalis meet and cancel each other out, like mixing hot and cold water to get lukewarm.

Think of it as a chemical balancing act. The acid brings its harsh properties, the alkali brings its opposite harsh properties, and together they create something neutral - hence the name neutralisation.

Quick Tip: Remember that neutralisation literally means "making neutral" - turning two extreme substances into something harmless!

KS4
Lesson 6: Neutralisation and
salt production. Neutralisation reactions
When acids and alkalis react together they will NEUTRALISE
each o

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

How Neutralisation Actually Works

Here's where the magic happens: when sodium hydroxide (an alkali) meets hydrochloric acid, they swap partners like a chemical dance. The sodium kicks out the hydrogen and takes its place with the chlorine.

What you end up with is sodium chloride (that's table salt!) and water. Pretty amazing that two dangerous chemicals can create something you put on your chips, right?

The key thing to remember is that the metal from the alkali always replaces the hydrogen from the acid. It's like a chemical game of musical chairs where the hydrogen always loses its seat.

Real-World Connection: This same process happens in your stomach when you take antacid tablets to neutralise excess stomach acid!

KS4
Lesson 6: Neutralisation and
salt production. Neutralisation reactions
When acids and alkalis react together they will NEUTRALISE
each o

Sign up to see the contentIt's free!

Access to all documents

Improve your grades

Join milions of students

By signing up you accept Terms of Service and Privacy Policy

The Universal Formula and Ion Action

Every neutralisation follows the same pattern: Alkali + Acid → Salt + Water. This formula is your best friend for any neutralisation question you'll face.

Behind the scenes, it's all about ions doing their thing. Acids release H⁺ ions whilst alkalis release OH⁻ ions. When these opposite ions meet, they grab onto each other and form water (H₂O).

The leftover bits themetalfromthealkaliandthenonmetalfromtheacidthe metal from the alkali and the non-metal from the acid pair up to form a salt. So you always get two products: water and a salt. Every single time, without fail.

Exam Success: Master this formula and you'll ace any neutralisation question - it never changes, no matter which acid and alkali you're dealing with!

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: Acid-base Reaction

Most popular content in Chemistry

Most popular content

Can't find what you're looking for? Explore other subjects.

Students love us — and so will you.

4.9/5

App Store

4.8/5

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 THE SCHOOLGPT. 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 THE SCHOOLGPT. 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