2.6. Reactions of Inorganic Compounds in Aqueous Solution

Question 1

lewis acid?

Answer 1

= electron pair accetor

Question 2

What is a lewis base?

Answer 2

= elecyrpm pair donator

Question 3

What is the colours of [fe(H2O)6] and [Cu(H2O)6]

Answer 3

=m: fe is green, cu is blue

Question 4

What is the colour of [M(H2o)]+?

Answer 4

= M= al colourless
= fe violet

Question 5

What is the reaction of OH and [Fe(H2O)6]2+ ?

Answer 5

[Fe(H2O)6]2+ + 2OH-
forms
[Fe(H2O)4(OH)2]+ 2H2O
= this forms a green precipitation

Question 6

What is the reaction of OH with [Cu(H2O)6]2+ ?

Answer 6

= [Cu(H2O)6]2+ + 2OH-
forms
[Cu(H2O)4(OH)2] + 2H2O
= this forms a blue precipitate

Question 7

What is the reaction between [Fe(H2O)6]3+ and OH-?

Answer 7

= [Fe(H2O)6]3+ + 3OH- => [Fe(H2O)3(OH)3] + 3H2O
= this forms a purple precipitate

Question 8

What is the reaction between [Al(H2O)6]3+ and Oh-?

Answer 8

= [Al(H2O)6]3+ + 3OH-
forms
[Al(H2O)3(Oh)3] + 3H2O
= this forms a white precipitate

Question 9

What type of reactions is the reaction of complex ions and OH-?

Answer 9

= hydrolosis reactions

Question 10

However what can aluminium do?

Answer 10

= [Al(H2O)6]3+ can be added to 3OH- to form [Al(H2O)3(OH)3] however can be added to another OH- to form,
[Al(H2O)2(OH)4]- which is a colourless
=amphoteric
= the salt acts as an acid and hydroluyse further
=

Question 11

what is the reaction of [Fe(H2O)6]2+ and ammonia?

Answer 11

[Fe(H2O)6]2+ + 2Nh3
forms
[Fe(H2O)4(OH)2 + 2Nh4+
= this is a green precipitate

Question 12

what does [Cu(H2o)6]2+ and ammonia form?

Answer 12

= [Cu(H2o)6]2+ + 2Nh3
forms
[Fe(H2o)4(Oh)2]+ 2Nh4+

Question 13

What is the reaction between [Fe(H2O)6]3+ and ammonia form?

Answer 13

== [Fe(H2O)6]3+ + 3Nh3- => [Fe(H2O)3(OH)3] + 3Nh4+
= this forms a purple precipitate

Question 14

What is the reaction between [Al(H2O)6]3+ and ammonia form?

Answer 14

= [Al(H2O)6]3+ + 3Nh3
forms
[Al(H2O)3(Oh)3] + 3Nh4+
= this forms a white precipitate

Question 15

What happens to the copper salt when ammonia is added in excess?

Answer 15

= [Cu(H2O)4(Oh)2] + 4Nh3 forms
= [Cu(H2o)2(Nh3)4]2+ + 2H2O+ 2OH-
= forms a deep blue solution

Question 16

What happens when 2+ [Fe(H2O)6]2+ reacts with carbonate ions?

Answer 16

[Fe(H2O)6]2+ + CO3 2-
forms
FeCo3 + 6H2O
= green precipitate

Question 17

What happens when 2+ [Cu(H2O)6]2+ reacts with carbonate ions?

Answer 17

forms CuCo3
= 6H2O

Question 18

What happens if a 3+ [Fe(H2O)6]+ reacts with carbonate ions?

Answer 18

= reacts with 3 carbonate ions, this forms
2[Fe(H2O)3(OH)3] and 3H2o and 3CO2
= this forms a blue precipitation
= stronger acid so forms salt, water and carbon dioxide

Question 19

What happens if a 3+ [Al(H2o)6]3+ reacts with carbonate ions?

Answer 19

= reacts with 3Co32-
= 2Al with 3 water and 3 oh groups, 3 water and 3 carbon dioxde
= forms salt, water and co2

Question 20

What colour is [FeCl4]2-

Answer 20

= yellow precipitate

Question 21

What colour is [CuCl4]2-