State and explain the trend in boiling points going down group 17.
1)All simple molecules. 2)Weak induced dipole-dipole attractions between halogen molecules.3)Boiling point increases down group.4)Number of electrons increases.5)Strength of induced dipole-dipole attractions increases.6)More energy required.
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State and explain the trend in electronegativity going down the group.
1)Electronegativity decreases.2)More full inner shells with more shielding.3)Bonding electrons further from nucleus.4)Nuclear charge increases but it's outweighed by other factors.5)Nuclear attraction decreases.
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State and explain the trend in reactivity of group 7 elements down the group.
1)Reactivity decreases.2)Electron being added is further from nucleus.3)More full inner shells with greater electron shielding.4)Nuclear charge increases but this is outweighed by other factors.5)Nuclear attraction decreases.
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What colour is chlorine in an aqueous solution and organic solvent?
Aqueous- pale yellow. Organic solvent- yellow
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What colour is bromine in an aqueous solution and organic solvent?
Aqueous- orange. Organic solvent-orange.
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What colour is iodine in an aqueous solution and organic solvent?
Aqueous-brown. Organic solvent- purple.
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What are the products when chlorine and water react?
HCl and HClO.
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What is the test for chlorine in chlorine water?
1)Test with blue litmus paper, will turn red then white.2)HCl turns blue litmus red.3)The chloric ion is a bleach so turns litmus white.
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Why are some environmentalists concerned with chlorine in water?
Chlorine may react with organic compounds in the water to form chlorinated hydrocarbons that may cause cancer.
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How is bleach normally made?
By reacting chlorine and cold, dilute sodium hydroxide.
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What are the products when chlorine and cold, dilute sodium hydroxide react?
H2O + NaCl + NaClO
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How are fertilisers normally made?
By reacting chlorine and hot, concentrated sodium hydroxide.
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What are the products when chlorine and hot,concentrated sodium hydroxide react?
H2O + NaCl + NaClO3.
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What colour precipitate do chlorine, bromine and iodine have when silver nitrate is added?
Cl-White, Br- Cream. I-Yellow
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Other cards in this set
Card 2
Front
State and explain the trend in electronegativity going down the group.
Back
1)Electronegativity decreases.2)More full inner shells with more shielding.3)Bonding electrons further from nucleus.4)Nuclear charge increases but it's outweighed by other factors.5)Nuclear attraction decreases.
Card 3
Front
State and explain the trend in reactivity of group 7 elements down the group.
Back
Card 4
Front
What colour is chlorine in an aqueous solution and organic solvent?
Back
Card 5
Front
What colour is bromine in an aqueous solution and organic solvent?
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