AQA · Chemistry · 8462
GCSE Chemistry (AQA): Ionic Compounds
Topic 2 — Bonding, Structure & Properties of Matter. Generated from the caption track of Cognito's lesson video "GCSE Chemistry - Ionic Compounds - Structure | Properties | Formula (2027/28 exams)"; each card deep-links to the moment in the video it came from. Lesson 2.03 of Cognito's AQA GCSE Combined Science (Trilogy) and Chemistry course (Higher tier), filed under AQA Chemistry 8462. Teaching by Cognito — https://cognitoedu.org/coursesubtopic/c2-gcse-aqa-h-c_2.03.
12 flashcards · Free to study · No account needed
Study this deck
Preparing your cards…
All questions and answers
Read through the full deck, or practise recalling each answer above.
What is the formula of magnesium chloride, and why?
Show answer
MgCl₂ — Mg²⁺ needs two Cl⁻ ions to balance its 2+ charge.
Why do ionic compounds have very high melting and boiling points?
Show answer
There are many strong ionic bonds holding the lattice together, so a large amount of energy is needed to break them all.
Under what two conditions can an ionic compound conduct electricity?
Show answer
When it is molten or dissolved in water — the ions are then free to move and carry charge.
What is the formula and charge of the ammonium ion?
Show answer
NH₄⁺.
What type of structure do ionic compounds form in the solid state?
Show answer
A giant three-dimensional regular lattice, in which positive and negative ions alternate and each ion is attracted to all those around it.
The formula of the nitrate ion is ?.
Show answer
NO₃⁻
The formula of the carbonate ion is ?.
Show answer
CO₃²⁻
What is the formula and charge of the hydroxide ion?
Show answer
OH⁻.
Why is calcium hydroxide written as Ca(OH)₂ with brackets?
Show answer
The brackets show that the subscript 2 applies to the whole hydroxide ion, not just the hydrogen.
What is the formula and charge of the sulfate ion?
Show answer
SO₄²⁻.
Why can solid ionic compounds not conduct electricity?
Show answer
The ions are fixed in the lattice, so there are no charged particles free to move.
What is the formula of aluminium sulfate?
Show answer
Al₂(SO₄)₃ — two Al³⁺ (6+) balance three SO₄²⁻ (6−).
Want to create your own cards? Create a free account. AI generation uses credits.