Group VII - Halogens
12 flashcards to master Group VII - Halogens
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Describe the general trend of density in Group VII (Halogens) as you go down the group.
The density of halogens increases as you go down the group. This is because the mass of the atoms increases more rapidly than the volume.
Describe the general trend of reactivity in Group VII (Halogens) as you go down the group.
The reactivity of halogens decreases as you go down the group. This is because the outer electrons are further from the nucleus, making it harder to attract electrons during reactions.
What is the appearance of chlorine at room temperature and pressure (r.t.p.)?
Chlorine appears as a pale yellow-green gas at r.t.p.
What is the appearance of bromine at room temperature and pressure (r.t.p.)?
Bromine appears as a red-brown liquid at r.t.p.
What is the appearance of iodine at room temperature and pressure (r.t.p.)?
Iodine appears as a grey-black solid at r.t.p.
Explain, in terms of reactivity, why bromine can displace iodide ions from a solution containing potassium iodide.
Bromine is more reactive than iodine. Therefore, bromine is a stronger oxidising agent than iodine and will displace iodide ions.
Give the formula for the halogen that is at the top of Group VII.
Fluorine's formula is F₂.
What is the name of the halogen that is below iodine in Group VII?
Astatine (At)
Complete the following displacement reaction: Cl₂ + 2KBr →
Cl₂ + 2KBr → 2KCl + Br₂. Chlorine is more reactive than bromine, therefore it will displace bromine.
Write the ionic equation for the reaction between Lead(II) ions and chloride ions to form lead(II) chloride precipitate.
Pb²⁺(aq) + 2Cl⁻(aq) → PbCl₂(s). Ensure correct formulas, balancing, and state symbols are included.
What precipitate is formed when silver nitrate solution is added to a solution containing chloride ions?
Silver chloride (AgCl) is formed. It is a white precipitate.
Which reagent can be used to test for water and what colour change is observed?
Anhydrous cobalt chloride or cobalt chloride paper can be used. It turns pink/blue to pink in the presence of water.
About Group VII - Halogens (8.3)
These 12 flashcards cover everything you need to know about Group VII - Halogens for your Cambridge IGCSE Chemistry (0620) exam. Each card is designed based on the official syllabus requirements.
What You'll Learn
- 5 Key Concepts - Core ideas and principles from the 0620 syllabus
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After mastering Group VII - Halogens, explore these related topics:
- 8.2 Group I - Alkali metals - 9 flashcards
- 8.4 Group VIII - Noble gases - 10 flashcards
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