Analysis of results Trial results – Mg Fe MgSO4 FeSO4 MgSO4 FeSO4 no change observed black solid formed no change observed no change observed on metal piece Magnet: moved Rate: n/a Rate: slowest Rate: n/a Rate: n/a Pb(NO3)2 CuSO4 Pb(NO3)2 CuSO4 black solid small black pieces very small grey dark grey coating ‘furry’ formed on metal on metal piece coating appeared appears on pin piece on pin Rate: fastest Rate: slowest Rate: fastest Rate: medium rate Pb Cu MgSO4 FeSO4 MgSO4 FeSO4 Observations no change observed no change observed no change observed no change observed Magnet: n/a Magnet: n/a Rate: n/a Rate: n/a Rate: n/a Rate: n/a Pb(NO3)2 CuSO4 Pb(NO3)2 CuSO4 no change observed lead pieces got no change observed no change observed darker Rate: n/a Rate:n/a Rate: n/a Rate: n/a 1. Arrange the metals into order from least reactive to most reactive. Explain the evidence for this sequence with reference to your results. [5 marks] Cu < Pb < Fe < Mg Copper was not able to displace any of the other metal ions no reactions were – seen. Lead displaced copper (grey coating) but not iron, magnesium or lead. Iron displaced copper quickly (dark grey coating) and lead slowly (small grey coating). Magnesium displaced copper quickly, and lead and iron slowly.
Analysis of results – Trial results Observations Mg Fe MgSO4 no change observed Rate: n/a FeSO4 black solid formed on metal piece Magnet: moved Rate: slowest MgSO4 no change observed Rate: n/a FeSO4 no change observed Rate: n/a Pb(NO3)2 ‘furry’ black solid formed on metal piece Rate: medium rate CuSO4 small black pieces on metal piece Rate: fastest Pb(NO3)2 very small grey coating appeared on pin Rate: slowest CuSO4 dark grey coating appears on pin Rate: fastest Pb Cu MgSO4 no change observed Rate: n/a FeSO4 no change observed Magnet: n/a Rate: n/a MgSO4 no change observed Rate: n/a FeSO4 no change observed Magnet: n/a Rate: n/a Pb(NO3)2 no change observed Rate: n/a CuSO4 lead pieces got darker Rate:n/a Pb(NO3)2 no change observed Rate: n/a CuSO4 no change observed Rate: n/a 1. Arrange the metals into order from least reactive to most reactive. Explain the evidence for this sequence with reference to your results. [5 marks] Cu < Pb < Fe < Mg Copper was not able to displace any of the other metal ions – no reactions were seen. Lead displaced copper (grey coating) but not iron, magnesium or lead. Iron displaced copper quickly (dark grey coating) and lead slowly (small grey coating). Magnesium displaced copper quickly, and lead and iron slowly.
323617-pag-activity-chemistry-reactivity-trends-suggestion-2.docx