Question
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Answer
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what happens to electronegativity as you go down the group
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decreases
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what is the colour of the precipitate formed when silver nitrate is added to bromide
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pale cream
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Give the half equation of bromide (from the reaction with sulfuric acid)
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2Br- > Br2 + 2e-
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what is the colour of the precipitate formed when silver nitrate is added to fluoride
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no precipitate
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will chlorine displace bromide from a molecule
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yes
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what colour is the bromine gas produced from the reaction of bromine with sulfuric acid
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brown
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what is the first electron affinity
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the energy released when 1 mole of gaseous atoms each gain an electron, forming 1 mole of gaseous 1- ions
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what is an oxidising agent
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an atom which oxidises another atom
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what is reducing power
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the ability of an atom to reduce another atom
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what is produced when fluoride ions react with sulfuric acid
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steamy fumes
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define oxidation
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loss of electrons
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what is the oxidation states of hydrogen
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+1
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what is the reversible equation for when solid sodium chlorate reacts with water
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NaClO + H2O > Na+ + OH- + HClO
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why is chlorine put in swimming pools
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to kill bacteria
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what is the colour of the precipitate formed when silver nitrate is added to chlodide
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white
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what colour is the iodine gas produced from the reaction of iodide with sulfuric acid
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purple
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what is the chlorine reaction that happens in sunlight
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2Cl2 + 2H2O > 4HCl + O2
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what happens to boiling point as you go down the group
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increases
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what is the colourless (choking) gas produced when Iodide reacts with sulfuric acid
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Sulfur dioxide
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does silver iodide dissolve in ammonia
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no
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why acidify a solution before adding silver nitrate
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to remove impurities
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what is the first test used for halide identification
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silver nitrate test
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why does the amount of chlorine in pools need to be controlled
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it is toxic
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what is the bad egg smell gas produced when iodide reacts with sulfuric acid
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H2S
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What is the equation between sodium chloride and sulfuric acid
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Nacl + H2SO4 > HCl + NaHSO4
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define reduction
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gain of electrons
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does silver bromide dissolve in ammoia
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only in concentrated ammonia
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which group are halogens
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7
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what is the oxidation state of sulfur in H2SO4
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6
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what happens to reactivity as you go down the group
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decreases
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what is the colour of the precipitate formed when silver nitrate is added to iodide
|
pale yellow
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what are the silver halides then reacted with
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ammonia
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what is the reversible reaction from chloric acid to hydrochloric acid
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Cl2 + H2O > HClO + HCl
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what type of reaction forms steamy fumes when a halide reacts with sulfuric acid
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acid-base
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what is the reaction of chlorine with sodium hydroxide
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Cl2 + 2NaOH > NaClO + NaCl + H2O
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what is formed when silver chloride reacts with ammonia
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colourless solution
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what is the oxidation state of oxygen
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-2
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what is disproportionation
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when an atom is both oxidised and reduced at the same time
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