Check out IGCSE Chemistry full course details here.
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South Africa
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Ghana
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Ghana
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UK
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India
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Kuwait
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Kuwait
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SM
New Zealand
SM
New Zealand
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India
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India
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India
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India
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South Africa
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South Africa
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Kuwait
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Malaysia
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Singapore
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Greece
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South Africa
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South Africa
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South Africa
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South Africa
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India
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India
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India
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India
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India
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Germany/France
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Singapore
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Singapore
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Indonesia
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Malaysia
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India
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India
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Switzerland
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Bahrain
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Bahrain
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South Africa
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South Africa
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United Arab Emirates
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United Arab Emirates
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Kuwait
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Kuwait
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Singapore
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Singapore
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South Africa
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Kuwait
Ahmed Ibrahim
Kuwait
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Malaysia
Qi Wen
Malaysia
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Turkey
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Turkey
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Saudi Arabia
Omayma Muhammad
Saudi Arabia
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Qi Wen Chia
Malaysia
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India
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India
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Indonesia
Alvin Fujito
Indonesia
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Kuwait
Madina
Kuwait
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Egypt
Alhussien Rehan
Egypt
Feedback was very valuable
SM
New Zealand
SM
New Zealand
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Chandrika Kannan
USA
Chandrika Kannan
USA
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Annelie Titan
South Africa
Annelie Titan
South Africa
I Got 4A* and 2A
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Thank you for all your help, surely an amazing website, would love to have a similar one for A levels.
Thank you!"
Haneea Yasir
UAE
Haneea Yasir
UAE
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A. Fatim
Egypt
A. Fatim
Egypt
Thorough and well-designed courses

Tassoula
Tassoula
It was very helpful in terms of what to improve on
Ewan Swart
South Africa
Ewan Swart
South Africa
I got 9 A*s and 1 A!
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Hong Kong
Yee Kwan
Hong Kong
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Bo Yang
China
Bo Yang
China
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Rekha Thakwani
India
Rekha Thakwani
India
I got A* in English
Nawal Amir
Saudi Arabia
Nawal Amir
Saudi Arabia
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Harsh Aryan
India
Harsh Aryan
India
Very good study guide
Timoth Goh
Malaysia
Timoth Goh
Malaysia
Recommend Skolatis to any student who wants to take IGCSE or A/AS levels
Akshit Philip
Bahrain
Akshit Philip
Bahrain
I got A* and A’s
Nadine Younes
Kuwait
Nadine Younes
Kuwait
The videos are very useful
Sivam
UK
Sivam
UK
Performed better in the exam

Devenedra Singh
India
Devenedra Singh
India
Q&A Session
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33 responses
i got 7 out of 10 in the electrochemistry quiz.And i skipped 2 questions regarding the hydrogen fuel cells,since i haven’t studied them yet,so i want to know what question i got a wrong in.Thank you
Hi Afna,
Thank you for joining our free IGCSE Chemistry lesson! We’re happy to have you with us.
Here’s a breakdown of your quiz results:
• Score: 7/10
• For review: Question 2
• Unattempted: Questions 5 & 10
To get the correct answers, simply retake the MCQ and make sure to enter a valid email address so we can send them to you.
If any questions come up or if you’d like help understanding the topics, just reply here. We’re happy to explain things in more detail and support your learning journey.
Best Regards,
Chemistry Department
Hi,
How can I access the free tutoring? Where can I access the free videos? Is there any link?
Thanks!
Hi Hana,
It’s nice to see you here again.
Our next free lessons will be on June 9 to 30. You visit any of the free lessons pages, and you will see the notes and videos when they are live.
In the meantime, make sure to vote for the topic that you want us to cover.
Please also sign up for our newsletter to be notified when the free lessons start. Kindly join here: https://skolatis.com/newsletter/
We hope to see you at our next free lessons.
Hello!
(With reference to Paper 33, October/November, 2011, Question 3dii)
Kindly explain to me why we cannot consider oxidizing/reducing agents, and instead have to consider bases/acids as per the marking scheme.
Thank you
Hi there,
Thank you for your message.
The free Chemistry lesson is on March 22 – 28.
We will be glad to include this topic, Oxidation and Reduction, as one of the topics for voting.
Please kindly sign up for our newsletter at https://skolatis.com/newsletter/ to receive our announcement when the voting opens.
Thank you so much!
Hi there,
Reducing/oxidizing agents are present in redox reactions. There are two easy ways to establish whether oxidation/reducing processes took place in a chemical reaction:
– a gain of oxygen (oxidation) by an element and loss of oxygen (reduction)
– electron transfer and changes in oxidation number are present
In the reaction presented between phosphate ion and sulfuric acid, none of the reagents gains/loses oxygen. Therefore, it is NOT a redox reaction and the reagents cannot be classified into reducing/oxidizing agents.
According to the Brønsted–Lowry theory of acids and bases, a BASE is a PROTON ACCEPTOR. In the case of Question 3dii, the phosphate ion ACCEPTS two PROTONS leading to a dihydrogen phosphate ion.
We hope this helps. If you require any guidance, please do not hesitate to contact us.
Best Regards,
Chemistry Department
Thank you so much for your help.
Hi,
We are happy to help. We hope to see you at our next free lessons.