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3 Jul 2025
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GCSE Chemistry C4 Chemical Calculationsprovides comprehensive coverage of essential... Show more
This section delves deeper into chemical calculations, focusing on balanced equations and limiting reactants.
The process of converting masses to balanced equations is explained step-by-step, emphasizing the law of conservation of mass.
Vocabulary: Limiting reactant - the reactant that gets used up first in a reaction.
The concept of yield in chemical reactions is introduced, including the calculation of percentage yield.
Formula: Percentage yield = x 100
Factors affecting percentage yield are discussed, providing valuable insights for AQA GCSE C4 chemical calculations.
The page also covers atom economy, an important concept in sustainable chemistry production.
Definition: Atom economy is a measure of the extent to which atoms in the starting materials end up in the desired product.
This final section focuses on concentration calculations, a crucial skill for GCSE Chemistry calculations questions.
The page explains how to express and calculate concentrations of solutions, providing formulas and examples.
Formula: Concentration = amount of solute / volume of solution
Methods to increase the concentration of an aqueous solution are briefly mentioned, rounding out the comprehensive coverage of C4 Chemistry AQA topics.
Highlight: Understanding concentration calculations is essential for solving Moles Chemistry GCSE Questions and performing well in exams.
This guide serves as an excellent resource for students preparing for AQA GCSE C4 chemical calculations, providing clear explanations, formulas, and examples to master these fundamental chemistry concepts.
Page 4 focuses on solution concentrations and their calculations, vital for understanding Calculating masses Chemistry GCSE Questions. The page provides detailed explanations of concentration calculations and methods to adjust solution concentrations.
Vocabulary: Concentration - The amount of solute dissolved in a specific volume of solution.
Example: To calculate concentration in g/dm³, divide the mass of solute by volume of solution .
Highlight: This section is particularly important for AQA chemistry exam-style questions C4 chemical calculations.
This page covers solution concentrations and their calculations, providing essential information for understanding solution chemistry.
Highlight: Concentration can be expressed in g/dm³ using the formula: Concentration = amount of solute / volume of solution
Example: To increase solution concentration, you can either add more solute or evaporate some solvent.
This section introduces the fundamental concepts of relative atomic masses, relative formula masses, and moles in chemistry calculations.
Definition: Relative atomic mass is the average mass of an atom of an element compared to 1/12 the mass of a carbon-12 atom.
The concept of moles is explained as a way to describe the amount of substance, with one mole containing Avogadro's constant of particles.
Highlight: The mole equation is crucial for GCSE Chemistry calculations: Number of moles = mass / Ar or Mr
The page also covers how to use balanced equations for reacting mass calculations, which is essential for solving C4 Chemical calculations questions.
Example: To calculate reacting masses:
- Calculate the ratio of moles
- Use the ratio and multiply by moles
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App Store
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
GCSE Chemistry C4 Chemical Calculations provides comprehensive coverage of essential calculations in chemistry, from relative masses to concentration calculations and titrations.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This section delves deeper into chemical calculations, focusing on balanced equations and limiting reactants.
The process of converting masses to balanced equations is explained step-by-step, emphasizing the law of conservation of mass.
Vocabulary: Limiting reactant - the reactant that gets used up first in a reaction.
The concept of yield in chemical reactions is introduced, including the calculation of percentage yield.
Formula: Percentage yield = x 100
Factors affecting percentage yield are discussed, providing valuable insights for AQA GCSE C4 chemical calculations.
The page also covers atom economy, an important concept in sustainable chemistry production.
Definition: Atom economy is a measure of the extent to which atoms in the starting materials end up in the desired product.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This final section focuses on concentration calculations, a crucial skill for GCSE Chemistry calculations questions.
The page explains how to express and calculate concentrations of solutions, providing formulas and examples.
Formula: Concentration = amount of solute / volume of solution
Methods to increase the concentration of an aqueous solution are briefly mentioned, rounding out the comprehensive coverage of C4 Chemistry AQA topics.
Highlight: Understanding concentration calculations is essential for solving Moles Chemistry GCSE Questions and performing well in exams.
This guide serves as an excellent resource for students preparing for AQA GCSE C4 chemical calculations, providing clear explanations, formulas, and examples to master these fundamental chemistry concepts.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
Page 4 focuses on solution concentrations and their calculations, vital for understanding Calculating masses Chemistry GCSE Questions. The page provides detailed explanations of concentration calculations and methods to adjust solution concentrations.
Vocabulary: Concentration - The amount of solute dissolved in a specific volume of solution.
Example: To calculate concentration in g/dm³, divide the mass of solute by volume of solution .
Highlight: This section is particularly important for AQA chemistry exam-style questions C4 chemical calculations.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This page covers solution concentrations and their calculations, providing essential information for understanding solution chemistry.
Highlight: Concentration can be expressed in g/dm³ using the formula: Concentration = amount of solute / volume of solution
Example: To increase solution concentration, you can either add more solute or evaporate some solvent.
Access to all documents
Improve your grades
Join milions of students
By signing up you accept Terms of Service and Privacy Policy
This section introduces the fundamental concepts of relative atomic masses, relative formula masses, and moles in chemistry calculations.
Definition: Relative atomic mass is the average mass of an atom of an element compared to 1/12 the mass of a carbon-12 atom.
The concept of moles is explained as a way to describe the amount of substance, with one mole containing Avogadro's constant of particles.
Highlight: The mole equation is crucial for GCSE Chemistry calculations: Number of moles = mass / Ar or Mr
The page also covers how to use balanced equations for reacting mass calculations, which is essential for solving C4 Chemical calculations questions.
Example: To calculate reacting masses:
- Calculate the ratio of moles
- Use the ratio and multiply by moles
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.
You can download the app from Google Play Store and Apple App Store.
That's right! Enjoy free access to study content, connect with fellow students, and get instant help – all at your fingertips.
App Store
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
