AS Chemistry - Group 7 - Flashcards in A Level and IB Chemistry

Created by: ambermeganjones
Created on: 24-04-16 20:07

State the trend down group 7

Group 17 elements are all simple molecules  there are weak induced dipole-dipole attractions between halogen molecules  going down Group 17 boiling point increases

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Explain the trend down group 7

the number of electrons in each halogen molecule increases  the strength of induced dipole-dipole attractions increases  more energy is required to break stronger intermolecular forces

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State and explain the trend in electronegativity going down Group 7

decreases  there are more full inner shells with more electron shielding  bonding electrons are further from nucleus  nuclear charge outweighed  nuclear attraction for the bonding electrons decreases

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State and explain the trend in reactivity of Group 7 elements down the group

 reactivity decreases  electron being added is further from nucleus  there are more full inner shells with greater electron shielding  nuclear attraction for the electron being added decreases

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State the colours of Cl, Br and I in aq solution

Cl=yellow Br=orange I=brown

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State the colours of Cl, Br and I in organic solvents

Cl=yellow Br=orange I=purple

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If chlorine water is tested with blue litmus paper...

it goes red then white as the chloric ion is a bleach

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Cl2(g) + H2O(l) =

HCl(aq) + HClO(aq)

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Cl2(g) + 2NaOH(aq) = (BLEACH)

H2O(l) + NaCl(aq) + NaClO(aq)

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3Cl2(g) + 6NaOH(aq) = (WEEDKILLER)

3H2O(l) + 5NaCl(aq) + NaClO3(aq)

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Other cards in this set

Card 2

Front

Explain the trend down group 7

Back

the number of electrons in each halogen molecule increases  the strength of induced dipole-dipole attractions increases  more energy is required to break stronger intermolecular forces

Card 3

Front

State and explain the trend in electronegativity going down Group 7

Back

Card 4

Front

State and explain the trend in reactivity of Group 7 elements down the group

Back

Card 5

Front

State the colours of Cl, Br and I in aq solution

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AS Chemistry - Group 7