Chemsheets answers

Hi,

I was wondering if anyone had chemsheets transition metal task 6 redox titrations answers (A2 1027, 7 March 2017).

Thanks

Reply 1

applejuice22

16

I know this is way too late for the original asker, but for anyone else who needs it here you go!! PS: does anyone happen to have the answers to task 3 of the same booklet?Task 6 answers:1.0.122 mol dm-3 (3sf)2 4.65% (3sf)3 x = 7 (nearest integer), Mr = 126 (3sf)4c n = 1 (nearest integer), Mr = 146 (3sf)5 12.8% (3sf)6 1:0.6; x = 2 (nearest integer), Mr = 180 (3sf)7 x = 12 (nearest integer), Mr = 500 (3sf)8 [Fe2 ] = 0.0600 mol dm-3 (3sf); [Fe3 ] = 0.0160 mol dm-3 (3sf)9 % Fe = 14.0% (3sf)10 x = 1 (nearest integer), Mr = 183 (3sf)11 4.0% (sf is arguable!)

Reply 2

aSimpson2

2

hi! might be too late but I have the answers for task 3 (substitution reactions)-1a) ligands replaced by other ligands b) 1, 2, 4, 5, 6, 7 c) 5 d)Cl–too big so cannot fit 6 around metal e) 3, 4, 5, 6 2a) 4– b) [Pb(H2O)6]2 EDTA4–→ [Pb(EDTA)]2– 6H2O c) ΔH negligible as similar number and type of bonds broken / formed ΔS positive as go from 2 to 7 particles ΔG (very) negative and therefore reaction feasible d) ΔG (very) positive and therefore reaction not feasible.

Reply 3

applejuice22

16

Original post by aSimpson2

hi! might be too late but I have the answers for task 3 (substitution reactions)-1a) ligands replaced by other ligands b) 1, 2, 4, 5, 6, 7 c) 5 d)Cl–too big so cannot fit 6 around metal e) 3, 4, 5, 6 2a) 4– b) [Pb(H2O)6]2 EDTA4–→ [Pb(EDTA)]2– 6H2O c) ΔH negligible as similar number and type of bonds broken / formed ΔS positive as go from 2 to 7 particles ΔG (very) negative and therefore reaction feasible d) ΔG (very) positive and therefore reaction not feasible.

thank you!!!

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