3 Reaction of halide with silver nitrate

 

/
~
~
~
/
Show Learning Materials

2.3 Halogens Page 1

Oxford Textbook Pages : 165 - 166

CGP Revision Guide Pages : 103

/
/
/
/

Show Specification Ref : 3.2.3.1

/
/
/
/
Show past exam questions

Question 1 / 5

AQA Jan 2011 Paper 2 Q3 do not write outside the box the following pairs of compounds can be distinguished by observing what happens in test tube reactions for each pair give a suitable aqueous reagent that could be added separately to each compound describe what you would observe in each case a naf aq and nacl aq reagent observation with naf aq observation with nacl aq marks b bacl aq and mgcl aq reagent observation with bacl aq observation with mgcl aq marks c agcl s and agi s reagent observation with agcl s observation with agi s marks d butan ol l and methylpropan ol l reagent observation with butan ol l observation with methylpropan ol l marks wmp jan chem
Show answer

Question 2 / 5

AQA Jan 2013 Paper 2 Q10 do not write outside the box chlorine is a powerful oxidising agent a write the simplest ionic equation for the reaction between chlorine and aqueous potassium bromide state what is observed when this reaction occurs marks extra space b write an equation for the reaction between chlorine and cold dilute aqueous sodium hydroxide give a major use for the solution that is formed by this reaction give the iupac name of the chlorine containing compound formed in this reaction in which chlorine has an oxidation state of marks extra space wmp jan chem c write an equation for the equilibrium reaction that occurs when chlorine gas reacts with cold water do not write outside the box give one reason why chlorine is used for the treatment of drinking water even though the gas is very toxic marks extra space d state how you could test a sample of water to show that it contains chloride ions in your answer give a reagent one observation and the simplest ionic equation for the reaction with the reagent marks extra space end of questions wmp jan chem
Show answer

Question 3 / 5

AQA Jun 2012 Paper 2 Q9 do not write outside the box a student investigated the chemistry of the halogens and the halide ions a in the first two tests the student made the following observations test observation add chlorine water to aqueous potassium iodide solution the colourless solution turned a brown colour add silver nitrate solution to aqueous potassium chloride solution the colourless solution produced a white precipitate a i identify the species responsible for the brown colour in test write the simplest ionic equation for the reaction that has taken place in test state the type of reaction that has taken place in test marks extra space a ii name the species responsible for the white precipitate in test write the simplest ionic equation for the reaction that has taken place in test state what would be observed when an excess of dilute ammonia solution is added to the white precipitate obtained in test marks extra space wmp jun chem b in two further tests the student made the following observations do not write outside the box test observation add concentrated sulfuric acid to solid potassium chloride the white solid produced misty white fumes which turned blue litmus paper to red add concentrated sulfuric acid to solid potassium iodide the white solid turned black a gas was released that smelled of rotten eggs a yellow solid was formed b i write the simplest ionic equation for the reaction that has taken place in test identify the species responsible for the misty white fumes produced in test marks extra space b ii the student had read in a textbook that the equation for one of the reactions in test is as follows h i h so i h s h o write the two half equations for this reaction state the role of the sulfuric acid and identify the yellow solid that is also observed in test marks extra space question continues on the next page turn over wmp jun chem do not write outside the box b iii the student knew that bromine can be used for killing microorganisms in swimming pool water the following equilibrium is established when bromine is added to cold water br i h o i hbro aq h aq br aq use le chatelier s principle to explain why this equilibrium moves to the right when sodium hydroxide solution is added to a solution containing dissolved bromine deduce why bromine can be used for killing microorganisms in swimming pool water even though bromine is toxic marks extra space end of questions wmp jun chem
Show answer

Question 4 / 5

AQA Jun 2013 Paper 2 Q2 do not write outside the box the following pairs of compounds can be distinguished by simple test tube reactions for each pair give a suitable reagent that could be added separately to each compound to distinguish between them describe what you would observe in each case a agbr s and agi s reagent observation with agbr s observation with agi s marks b hcl aq and hno aq reagent observation with hcl aq observation with hno aq marks c cyclohexane and cyclohexene reagent observation with cyclohexane observation with cyclohexene marks wmp jun chem d butanal and butanone do not write outside the box reagent observation with butanal observation with butanone marks turn over for the next question turn over wmp jun chem there are no questions printed on this page do not write on this page answer in the spaces provided wmp jun chem
Show answer

Question 5 / 5

AQA Jun 2014 Paper 2 Q6 do not write outside the box this question is about group chemistry a sea water is a major source of iodine the iodine extracted from sea water is impure it is purified in a two stage process stage stage l h o so hl h so hl cl l hcl a i state the initial oxidation state and the final oxidation state of sulfur in stage marks oxidation state of s in so oxidation state of s in h so a ii state in terms of electrons what has happened to chlorine in stage mark b when concentrated sulfuric acid is added to potassium iodide iodine is formed in the following redox equations ki h so khso l s h o ki h so khso l h s h o b i balance the equation for the reaction that forms sulfur b ii deduce the half equation for the formation of iodine from iodide ions mark mark b iii deduce the half equation for the formation of hydrogen sulfide from concentrated sulfuric acid mark question continues on the next page turn over wmp jun chem do not write outside the box c a yellow precipitate is formed when silver nitrate solution acidified with dilute nitric acid is added to an aqueous solution containing iodide ions c i write the simplest ionic equation for the formation of the yellow precipitate mark c ii state what is observed when concentrated ammonia solution is added to this yellow precipitate mark c iii state why the silver nitrate solution is acidified when testing for iodide ions mark c iv explain why dilute hydrochloric acid is not used to acidify the silver nitrate solution in this test for iodide ions mark wmp jun chem do not write outside the box d chlorine is toxic to humans this toxicity does not prevent the large scale use of chlorine in water treatment d i give one reason why water is treated with chlorine mark d ii explain why the toxicity of chlorine does not prevent this use mark d iii write an equation for the reaction of chlorine with cold water mark e give the formulas of the two different chlorine containing compounds that are formed when chlorine reacts with cold dilute aqueous sodium hydroxide mark formula formula turn over for the next question turn over wmp jun chem
Show answer
/
/
/
/
/
/