AQA Jun 2010 Paper 5 Q5 (with explained solutions) |

Skip to content

AQA Jun 2010 Paper 5 Q5

Answers available below

do not write outside the box the scheme below shows some reactions of copper ii ions in aqueous solution w x y and z are all copper containing species concentrated hcl scrap iron cu s cu h o aq dilute nh aq an excess of nh aq na co aq a identify ion w describe its appearance and write an equation for its formation from cu h o aq ions ion w appearance equation marks b identify compound x describe its appearance and write an equation for its formation from cu h o aq ions compound x appearance equation marks wmp jun chem do not write outside the box c identify ion y describe its appearance and write an equation for its formation from x ion y appearance equation marks d identify compound z describe its appearance and write an equation for its formation from cu h o aq ions compound z appearance equation marks e copper metal can be extracted from a dilute aqueous solution containing copper ii ions using scrap iron e i write an equation for this reaction and give the colours of the initial and final aqueous solutions equation initial colour final colour marks e ii this method of copper extraction uses scrap iron give two other reasons why this method of copper extraction is more environmentally friendly than reduction of copper oxide by carbon reason reason marks turn over wmp jun chem

Show answer

q part sub part a b c d e i marking guidance mark comments chemistry aqa gce mark scheme june series w is cucl yellow green yellow green cu h o cl x is cu h o oh blue precipitate solid cu h o nh cucl h o cu h o oh nh y is cu nh h o deep dark royal blue solution cu h o oh nh cu nh h o h o oh z is cuco green solid precipitate cu h o co cu aq fe s blue green cuco h o cu s fe aq h not necessary to indicate solution do not allow precipitate solid allow hcl allow cu oh copper hydroxide ignore shades allow any balanced equation equations leading to this hydroxide or cu oh but must use ammonia qol accept equation for formation from cu oh allow copper carbonate allow blue green precipitate allow hydrated ions state symbols not essential but penalise if wrong do not allow description of solids allow yellow red brown orange e ii chemistry aqa gce mark scheme june series any two correct points about copper extraction from two of these three categories any relevant mention of lower energy consumption any relevant mention of benefits of less mining of copper ore less release of co or co into the atmosphere max do not allow reference to electricity alone or to temperature alone allow avoids depletion of copper ore resources not just greenhouse gases must mention co or co

Question 1 2 3 4 5 6 7

Topics to revise

AQA > Physical chemistry > Thermodynamics >

5 Gibb’s Free Energy

AQA > Inorganic chemistry > Transition metals >

1 General properties

AQA > Physical chemistry > Atomic structure AS >

4 Electronic arrangement

AQA > Inorganic chemistry > Transition metals >

3 Substitution reactions

AQA > Inorganic chemistry > Periodicity AS >

1 Periodicity

Similar questions

AQA Jun 2015 Paper 5 Q7

AQA Jun 2010 Paper 2 Q9

AQA Jun 2016 Paper 2 Q7

AQA Jan 2011 Paper 5 Q7

AQA Jun 2012 Paper 5 Q5

About us | Need Help? | Feedback

Proudly powered by WordPress | Theme: Sydney by aThemes.