TRANSITION METAL COLOURS

Question 1

COLOUR OF:

Cu(OH)2(s)

EXTRA: How is it made?

Answer 1

PALE BLUE PPT

adding dropwise NaOH/OH- or NH3 to Cu 2+(aq)

Question 2

COLOUR OF:

[Cu(H2O)6] 2+

EXTRA: How is it made?

Answer 2

PALE BLUE

reacting Cu(II)SO4 with water ( dissolving in water)

Question 3

COLOUR OF:

[Cu(NH3)4(H2O)2 ] 2+

EXTRA: How is it made?

Answer 3

DARK BLUE

adding excess NH3 to Cu 2+

Question 4

COLOUR OF:

CuCl4 2-

EXTRA: How is it made?

Answer 4

YELLOW

adding HCl to Cu 2+

Question 5

COLOUR OF:

Cu +

Answer 5

WHITE PRECIPITATE (CuI)
BROWN I2 SOLUTION

Question 6

COLOUR OF:

Cu2+ / Cu

Answer 6

BROWN SOLID
BLUE SOLUTION

Question 6

COLOUR OF:

CoCl4 2–

Answer 6

BLUE SOLUTION

Question 7

COLOUR OF:

[Cr(H2O)6] 3+

EXTRA: How is it made?

Answer 7

PALE PURPLE

Cr(H2O)3(OH)3 (s) + 3H + (aq ) —–> [Cr(H2O)6] 3+ (aq)

Question 8

WHAT IS SPECIAL ABOUT: Cr(H2O)3(OH)3 (s)

Answer 8

This hydroxide is classed as amphoteric because it can react with alkali to give a solution and react with acid to form the aqueous salt.

Cr(H2O)3(OH)3 (s) + 3OH- (aq ) -> [Cr(OH)6]3- (aq) + 3H2O(l)

Cr(H2O)3(OH)3 (s) + 3H+ (aq ) -> [Cr(H2O)6]3+(aq)

Question 8

COLOUR OF:

Cr(OH)3 (s)

EXTRA: How is it made?

Answer 8

DARK GREEN PPT

adding dropwise NH3 or NaOH/OH- to Cr 3+(aq)

Question 9

COLOUR OF:

[Cr(NH3)6] 3+

EXTRA: How is it made?

Answer 9

PURPLE

Adding excess NH3 to Cr 2+

Question 10

COLOUR OF:

[Cr(OH)6] 3–

EXTRA: How is it made?

Answer 10

DARK GREEN

adding excess NaOH/OH- to Cr(OH)3 (s)

Cr(H2O)3(OH)3 (s) + 3OH - (aq ) -> [Cr(OH)6] 3- (aq) + 3H2O(l)

Question 11

COLOUR OF:

Cr2O7 2–

Answer 11

ORANGE

Question 12

COLOUR OF:

CrO4 2–

Answer 12

YELLOW

Question 13

COLOUR OF:

[Mn(H2O)6] 2+

Answer 13

PALE PINK

Question 14

COLOUR OF:

Mn(OH)2(s)

EXTRA: How is it made?

Answer 14

PALE BROWN PPT

adding dropwise NaOH/OH- or NH3 to Mn 2+

Question 15

COLOUR OF:

[Fe(H2O)6] 2+

Answer 15

PALE GREEN

Question 16

COLOUR OF:

Fe(OH)2 (s)

EXTRA: How is it made?

Answer 16

DARK GREEN PPT

adding dropwise NaOH/OH- or NH3 to Fe 2+

Question 17

COLOUR OF:

[Fe(H2O)6] 3+

Answer 17

YELLOW

Question 18

COLOUR OF:

Fe(OH)3 (s)

EXTRA: How is it made?

Answer 18

ORANGE-BROWN PPT

adding dropwise NaOH/OH- or NH3 to Fe 3+

Question 19

COLOUR OF:

MnO 4– /Fe 2+ –> Mn 2+ /Fe 3+

Answer 19

purple (MnO4 –) to pale pink (Mn 2+)

Question 20

COLOUR OF:

I – /Fe 3+ —> I2/Fe 2+

Answer 20

orange brown (Fe3+) to brown (I2)

Question 21

what is a :
purple solution

WRITE THE EQUATION FOR IT

Answer 21

[Cr(NH3)6] 3+

Cr(OH)3(H2O)3(s) + 6NH3 (aq) –> [Cr(NH3)6]3+(aq) + 3H2O(l) + 3OH- (aq)

Question 22

what is a :
dark green/grey green precipitate

how is it made?

Answer 22

Cr(OH)3 (s)

Cr3+ (aq) + 3OH- (aq) –> Cr(OH)3 (s)

Question 23

evaluate all cells

Answer 23

Question 24

what are the monodentate ligands

Answer 24

Question 25

what are all the bidentate ligands

Answer 25

Question 26

hexadentate ligand ?

Answer 26

Question 27

how does cis platin work

Answer 27

Question 28

what is the relationship between arrhenius and y=mx+c

Answer 28

lnk= (-ea/R) (1/T) +lnA

Question 28

draw the enthalpy + entropy temp table

Question 29

what is relationship between gibbs and the y = mx +c

Answer 29

Question 30

relative mass of electron

Answer 30

The relative mass of an electron is 1/1836.

Question 31

Relative Atomic Mass:

Answer 31

​the weighted mean mass of an atom compared with 1/12th mass of

Question 32

Relative Isotopic Mass:

Answer 32

the mass of an atom of an isotope compared with 1/12th mass of an atom of carbon-12.

Question 33

Relative Formula Mass:

Answer 33

*the mass of the formula unit of a compound with a giant structure.

Question 34

RelativeMolecularMass(M​r)

Answer 34

:​the mass of a simple molecule.

Question 35

percentage yeild

Answer 35

actual/theoretical MASS

Question 36

atom economy

Answer 36

mr desired / mr of all reactants