Transition Metals

Question 1

What makes a transtition metal a transition metal?

Answer 1

It has an incomplete d subshell

Question 2

why is zinc not a transition metal?

Answer 2

It has a complete d subshell.

Question 3

What is a complex?

Answer 3

A central metal surrounded by ligands.

Question 4

What is a ligand?

Answer 4

A species which can donate a lone electron pair

Question 5

what is the type of bond formed between the metal ion and the ligand?

Answer 5

Dative covalent

Question 6

What is coordination number?

Answer 6

Number of bonds to central metal ion

Question 7

what does monodentate mean?

Answer 7

Can form one coordinate bond per ligand

Question 8

What to look for when doing a substitution reaction?

Answer 8

number of ligands
coordination number of each ligand
what is the size of each ligand
what is the charge of each each ligand
dont forget your extra product/s

Question 9

why do chloride ions only form 4 bonds?

Answer 9

When substituting chloride ions they will only form 4 coordinate bonds because they are large ions.

Question 10

What is the charge of EDTA?

Answer 10

4-

Question 11

Why does substituting a monodentate with a bidentate ligand make it more stable?

Answer 11

Positive entropy change as there are more molecules of products than reactants

Question 12

What is the use of EDTA?

Answer 12

To remove heavy metal ions from water and in shampoos to remove calcium.

Question 13

What three things arise colour change?

Answer 13

oxidation number
coordination number
ligand

Question 13

What three things arise colour change?

Answer 13

oxidation number
coordination number
ligand

Question 14

What are the ions of scandium colour?

Answer 14

no colour

Question 15

Determining the concentration of a complex ion?

Answer 15

add ligand to intensify colour
make up solutions of known concentrations
measure absorbtion with spectrometer
plot graph
interpolate with unknown substance

Question 16

What happens to the relative stability of the +2 and +3 transition metal ions as you progress along the period?

Answer 16

The relative stability of +2 increases across the period with respect to the +3 state.

Question 17

what do transition metals with high and low oxidation states tend to be?

Answer 17

High is oxidising agent and low is reducing agent?

Question 18

What acid do you use for manganate titrations?

Answer 18

Only sulphuric

Question 19

Why would using an insufficient amount of sulphuric acid produce an inaccurate reading of the volume of manganate being used?

Answer 19

Brown MnO2 will form which masks the colour change.

Question 20

Why would using an insufficient amount of sulphuric acid produce an inaccurate reading of the volume of manganate being used?

Answer 20

Brown MnO2 will form which masks the colour change.

Question 21

What is the catalyst being used in the manufacturing of methanol from carbon monoxide and water?

Answer 21

Cr2O3