aq ions reac

Question 1

give the equation and precipitate colour formed when Fe2+ reacts with OH-

Answer 1

[Fe(H2O)6]2+ and 2OH- > Fe(H2O)4(OH)2 and 2H2O

dark green precipitate

Question 2

give the equation and precipitate colour for reaction of Fe2+ and NH3

Answer 2

[Fe(H2O)6]2+ and 2NH3 > Fe(H2O)4(OH)2 and 2NH4+

dark green

Question 3

give the equation and colour of precipitation for Fe2+ and CO32-

Answer 3

[Fe(H2O)6]2+ and CO3,2- > FeCO3 + 6H2O

green

Question 4

give the colour and reac for cu2+ and Oh-

Answer 4

[Cu(H2O)6]2+ and 2OH- > Cu(H2O)4(OH)2 and 2H2O

light blue

Question 5

give colour and reac for CU2+ and ammonia

and excesz

Answer 5

[Cu(H2O)6]2+ and 2NH3 > Cu(H2O)4(OH)2 and 2NH4+
light blue precip

product + 4NH3 > [Cu(NH3)4(H2O)2] 2+ and 2OH - and 2H2O

dark blue solution

Question 6

give coloour and reasc for cu2* and CO32-

Answer 6

[Cu(H2O)6]2* and CO32- > CuCO3 and 6H20

blue precipitate