Writing Ionic Formulae | Stoichiometry L3 | AS Chemistry (CIE 9701)

Lesson 3 of Atoms, Molecules & Stoichiometry for Cambridge International AS Level Chemistry (9701). How to predict ion charges from the Periodic Table, the polyatomic ions you must learn, and how to write correct ionic formulae every time. ⏱️ CHAPTERS 0:00 Introduction 1:45 Predicting charges 5:59 Ions to learn 11:14 Writing formulae 19:32 Exam questions 📝 PAST PAPER QUESTIONS 19:49 Which pair of ionic formulae is correct? (9701/12 M/J 2024 Q1, MCQ) 21:57 Identify a solid from its reactions with acid and hot alkali (an ammonium salt) (9701/12 O/N 2022 Q23, MCQ) 23:24 Deduce the formula of the cyanate ion from ammonium cyanate turning into urea (9701/11 O/N 2023 Q24, MCQ) ▶ Watch the whole Atoms, Molecules & Stoichiometry chapter in order:    • Atoms, Molecules & Stoichiometry | AS Chem...   📘 Full AS Chemistry 9701 course:    • AS Level Chemistry 9701 Full Course | CIE ...   🎓 The entire AS & A Level course is available on https://www.askpapers.com 📚 Practise on AskPapers • Topical past papers → https://www.askpapers.com/topics • Yearly papers + mark schemes → https://www.askpapers.com/papers • Revision notes → https://www.askpapers.com/notes • AI tutor → https://www.askpapers.com/tutor 🔔 Subscribe for full syllabus lessons, most repeated questions and solved past papers for Cambridge AS & A Level Chemistry. #ALevelChemistry #ASChemistry #9701 #CAIE #CIEChemistry #Stoichiometry #IonicFormulae #Ions #Chemistry AskPapers is not affiliated with or endorsed by Cambridge University Press & Assessment. Past-paper questions are © UCLES and used for educational commentary.