transition elemtns

Question 1

Write the equation for a reaction catalysed by a named transition element, compound or ion.

Answer 1

N2 + 3H2 ⇌ 2NH3 (allow →) AND Fe/iron oxide

2SO2 + O2 ⇌ 2SO3 (allow →) AND V2O5/Pt

Question 2

how can something act as a liganad eg (NH2)

Answer 2

N has a lone pair of electrons

Question 3

note

Answer 3

DO NOT FORGET CHARGES ON COMPLEX IONS !

Question 4

reaction of copper with excess ammonia ?

Answer 4

Question 5

colour of cucl4

Answer 5

YELLOW

Question 6

Any reaction with naoh

Answer 6

gives PRECIPITATE

Question 7

Model answer

Answer 7

Question 8

note

Answer 8

orbitals SHOULD BE to the POWER OF not nextto

Question 9

exlain why candium and zinc arent transition elements (6)

Answer 9

Question 10

explain why somethign is a bidentate ( 2)

Answer 10

Donates two electron/lone pairs to a metal ion OR Co3+ 

Electron/lone pair on N OR NH2 (groups ( mention electron DONATING groups )

Question 11

Answer 11

Question 12

Explain how ligand substitution reactions allow haemoglobin to transport oxygen

Answer 12

O2/oxygen bonds to Fe2+/Fe(II)  Fe2+/Fe(II) essential for 1st marking point

(When required,)O2 released

Question 13

reaction of excess zinc with aqeuous iron complex ion

Answer 13

Question 14

reaction of aqeuous iron complex with KCN

note: DID NOT HAVE TO INCLDUE POTTASIUM , JSUT THE NEFGATIVE CN - IONS

Answer 14

Question 15

NOTE : if exxces of somethign used, it fills up ALL spots

Answer 15

Question 16

role of ammonia

Answer 16

acts as base/ alkali AND accepts proton from said element

Question 17

Why does the Ni(DMG)2 complex have no overall charge?

Answer 17

(Each) DMG has 1– charge which cancel 2+ charge on Ni2+