WJEC A Level Chemistry
WJEC A Level Chemistry 1.1 Formulae and Equations Exam Questions
Free WJEC A Level Chemistry exam questions on 1.1 Formulae and Equations, with mark schemes. Covers chemical formulae, balanced equations, ionic equations and oxidation states.
1.1 Formulae and Equations exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
WJEC A Level Chemistry Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About WJEC A Level Chemistry 1.1 Formulae and Equations
This topic sets up the language of chemistry used in every later unit. Expect writing and balancing equations.
What you need to know
- Formulae Writing formulae from ions and oxidation states, including common polyatomic ions.
- Equations Balanced symbol equations with state symbols.
- Ionic equations Showing only the species that react, removing spectator ions.
- Oxidation states Rules for assigning oxidation numbers and identifying oxidation and reduction.
Common mistakes in 1.1 Formulae and Equations
- Changing subscripts instead of coefficients when balancing.
- Forgetting state symbols.
- Leaving spectator ions in ionic equations.
Try three 1.1 Formulae and Equations exam-style questions
1. Write the ionic equation for the neutralisation of an acid by an alkali. (1 mark)
Show the mark scheme answer
H⁺(aq) + OH⁻(aq) → H₂O(l).
2. State the oxidation state of manganese in KMnO₄. (1 mark)
Show the mark scheme answer
+7.
3. Balance: Al + O₂ → Al₂O₃. (1 mark)
Show the mark scheme answer
4Al + 3O₂ → 2Al₂O₃.
1.1 Formulae and Equations FAQs
What does Formulae and Equations cover?
Formulae, balanced and ionic equations, and oxidation states.
Why is this topic important?
Every calculation and mechanism later in the course depends on correct formulae and equations.
Do I need to learn ion charges?
Yes, including common polyatomic ions such as sulfate, nitrate and carbonate.
Revise this topic with flashcards: WJEC A Level Chemistry Flashcards, with mark scheme answers for Anki and Quizlet.
