transition metals and qualitative analysis Flashcards
what is the complex ion solution colour when: Cu2+ in aqueous sol
blue
[Cu(H20)6]2+ (aq)
what is the complex ion solution colour when: Fe2+ in aq solution
Pale green (aq)
[Fe(H20)6]2+
what is the complex ion solution colour when: Fe3+ in aq sol
yellow
[Fe(H20)6]3+ (aq)
what is the complex ion solution colour when: Mn2+ in aq sol
Pale pink
[Mn(H20)6]2+ (aq)
what is the complex ion solution colour when: Cr3+ in aq sol
violet
[Cr(H20)6]3+ (aq)
what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Cu(H20)6]2+ (aq)
Pale blue ppt
Cu(OH)2(H20)4 (s)
what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Fe(H20)6]2+(aq)
Dirty green ppt
Fe(OH)2(H20)4 (s)
what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Fe(H20)6]3+ (aq)
Orange ppt
Fe(OH)3(H20)3 (s)
what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Mn(H20)6]2+ (aq)
light brown ppt
Mn(OH)2(H20)4 (s)
what is the complex ion solution colour when: add some OH- OR NH3(aq) to [Cr(H20)6]3+ (aq)
Green-grey ppt
Cr(OH)3(H20)3 (s)
what is the complex ion solution colour when: add excess OH- to Cu(OH)2(H20)4 (s)
Insoluble in excess NaOH
no change
what is the complex ion solution colour when: add excess NH3(aq) to Cu(OH)2(H20)4 (s)
[Cu(NH3)4(H20)2] 2+ (aq)
Dark blue solution
what is the complex ion solution colour when: add excess NH3(aq) to Fe(OH)2(H20)4 (s)
Insoluble in excess NH3(aq)
no change
what is the complex ion solution colour when: add excess NH3(aq) to Fe(OH)3(H20)3 (s)
Insoluble in excess NaOH
no change
what is the complex ion solution colour when: add excess NH3(aq) to Mn(OH)2(H20)4 (s)
Insoluble in excess NaOH
no change
what is the complex ion solution colour when: add excess NH3(aq) to Cr(OH)3(H20)3 (s)
CR(NH3)6 ^3+ (aq)
Purple solution
what is the complex ion solution colour when: add excess OH- to Fe(OH)2(H20)4 (s)
Insoluble in excess NaOH
no change
what is the complex ion solution colour when: add excess OH- to Fe(OH)3(H20)3 (s)
Insoluble in excess NaOH
no change
what is the complex ion solution colour when: add excess OH- to Mn(OH)2(H20)4 (s)
Insoluble in excess NaOH
no change
what is the complex ion solution colour when: add excess OH- to Cr(OH)3(H20)3 (s)
Dark green solution
Cr(OH)6 ^3- (aq)
TM OX
coloured ion and ox state: MnO4 -
Mn+7
purple
TM OX
coloured ion and ox state: Cr2O7 2-
+6
orange
TM OX
coloured ion and ox state: MnO4 2-
+6
green
TM OX
coloured ion and ox state: VO2 +
+5
yellow
TM OX
coloured ion and ox state: VO 2+
+4
blue
TM OX
coloured ion and ox state:
Ti 3+
+3
purple
TM OX
coloured ion and ox state: V 3+
+3
green
TM OX
coloured ion and ox state: Cr 3+
+3
violet
TM OX
coloured ion and ox state: Fe 3+
+3
yellow
TM OX
coloured ion and ox state:
Ti 2+
+2
violet
TM OX
coloured ion and ox state:
V 2+
+2
violet
TM OX
coloured ion and ox state:
Mn 2+
+2
pale pink
TM OX
coloured ion and ox state:
Fe 2+
+2
pale green
TM OX
coloured ion and ox state:
Co 2+
+2
pink
TM OX
coloured ion and ox state:
Ni 2+
+2
green
TM OX
coloured ion and ox state:
Cu 2+
+2
pale blue
Transition metal def
A d-block element that can form at least one stable ion with an incomplete d-subshell
why can’t scandium and zinc be transition elements
do not form at least one stable ion with an incomplete d-subshell
Chromium electronic config
1s2 2s2 2p6 3s2 3p6 3d5 4s1
copper electronic config
1s2 2s2 2p6 3s2 3p6 3d10 4s1
the 4s subshell fills and empties…
before the 3d subshell
