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Halogens AQA A-level Chemistry

Just to help learn the content!
Use > as an arrow (even in reversible reactions)
Obviously can't subscript the number of atoms in a molecule or superscript for charges
Tell me if I've missed anything we need to know
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ghoioj
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Last updated: December 13, 2020
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First submittedDecember 13, 2020
Times taken78
Average score18.4%
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Question
Answer
what are the silver halides then reacted with
ammonia
what is the reversible reaction from chloric acid to hydrochloric acid
Cl2 + H2O > HClO + HCl
why acidify a solution before adding silver nitrate
to remove impurities
does silver bromide dissolve in ammoia
only in concentrated ammonia
what is the chlorine reaction that happens in sunlight
2Cl2 + 2H2O > 4HCl + O2
what is the colour of the precipitate formed when silver nitrate is added to iodide
pale yellow
what colour is the bromine gas produced from the reaction of bromine with sulfuric acid
brown
will chlorine displace bromide from a molecule
yes
why is chlorine put in swimming pools
to kill bacteria
what is reducing power
the ability of an atom to reduce another atom
what is the colour of the precipitate formed when silver nitrate is added to bromide
pale cream
which group are halogens
7
what is the reversible equation for when solid sodium chlorate reacts with water
NaClO + H2O > Na+ + OH- + HClO
what is an oxidising agent
an atom which oxidises another atom
define reduction
gain of electrons
what is disproportionation
when an atom is both oxidised and reduced at the same time
what is the colour of the precipitate formed when silver nitrate is added to fluoride
no precipitate
what is formed when silver chloride reacts with ammonia
colourless solution
what happens to reactivity as you go down the group
decreases
Question
Answer
what is the first electron affinity
the energy released when 1 mole of gaseous atoms each gain an electron, forming 1 mole of gaseous 1- ions
what is the oxidation state of oxygen
-2
what is the colour of the precipitate formed when silver nitrate is added to chlodide
white
what happens to electronegativity as you go down the group
decreases
what is the oxidation state of sulfur in H2SO4
6
what is the first test used for halide identification
silver nitrate test
does silver iodide dissolve in ammonia
no
What is the equation between sodium chloride and sulfuric acid
Nacl + H2SO4 > HCl + NaHSO4
what is the oxidation states of hydrogen
+1
what is the reaction of chlorine with sodium hydroxide
Cl2 + 2NaOH > NaClO + NaCl + H2O
what type of reaction forms steamy fumes when a halide reacts with sulfuric acid
acid-base
Give the half equation of bromide (from the reaction with sulfuric acid)
2Br- > Br2 + 2e-
define oxidation
loss of electrons
why does the amount of chlorine in pools need to be controlled
it is toxic
what colour is the iodine gas produced from the reaction of iodide with sulfuric acid
purple
what happens to boiling point as you go down the group
increases
what is the bad egg smell gas produced when iodide reacts with sulfuric acid
H2S
what is the colourless (choking) gas produced when Iodide reacts with sulfuric acid
Sulfur dioxide
what is produced when fluoride ions react with sulfuric acid
steamy fumes
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