Complex Ions

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

What is a ligand? (I/M w/ lp - frm DCB w/ trans. met. ion)

Back (Answer)

An ion or molecule with a lone pair of electrons that forms a dative covalent bond with a transition metal ion

Front (Question)

How type of bonds do ligands form to transition metal ions?

Back (Answer)

By forming dative covalent bonds using a lone pair of electrons

Front (Question)

What is meant by coordination number? (n. DCB to cent. m. ion)

Back (Answer)

Number of dative covalent bonds to the central metal ion

Front (Question)

What is a complex ion?

Back (Answer)

A transition metal ion coordinated bonded to ligands

Front (Question)

How does ligand size affect coordination number? (lrg. lig. = lwr. cood. n. - fwr. lig. fit.)

Back (Answer)

Larger ligands result in a lower coordination number because fewer ligands can fit around the metal ion

Front (Question)

Can a complex ion contain more than one type fo ligand?

Back (Answer)

Yes

Front (Question)

What types of bonding are present in a complex ion?

Back (Answer)

Only dative covalent bonding

Front (Question)

What charges can complex ions have?

Back (Answer)

Positive, negative or neutral

Front (Question)

How are ligands ordered when naming a complex ion with different ligands?

Back (Answer)

Ligands are listed in alphabetical order

#10

Front (Question)

How are two neutral ligands named in a complex ion?

Back (Answer)

Neutral ligands are named in alphabetical order

#11

Front (Question)

Name three common ligands in AQA transition metal chemistry (W,A,C)

Back (Answer)

Water (H₂O) Ammonia (NH₃) Chloride (Cl⁻)

#12

Front (Question)

What type of ligand is (H₂O) and(NH₃), compared to (Cl⁻)?

Back (Answer)

(H₂O) and (NH₃) are neutral ligands, whereas (Cl⁻) is a negative ligand

#13

Front (Question)

• What is the formula for this complex ion?

Back (Answer)

[Cu(H2O)6]

#14

Front (Question)

• Name the complex ion shown

Back (Answer)

Hexaaquairon (III)

#15

Front (Question)

• Draw and identify the shape of this complex ion, [Ni(CN)4]2-

Back (Answer)

Check online for [Ni(CN)4]2- for drawing Square planar shape with bond angle of 90 degrees

#16

Front (Question)

• State the shape of the complex ion present in the following solutions a. Cu2+ ions in water b. Co2+ ions in concentrated HCl c. Ag+ in concentrated NH3

Back (Answer)

a. octahedral b. tetrahedral c. linear

#17

Front (Question)

What prefix is used for chloride ligands in complex ion names?

Back (Answer)

chloro-

#18

Front (Question)

What prefix is used for ammonia ligands in complex ion names?

Back (Answer)

Ammine-

#19

Front (Question)

How does the name of the metal change in a negatively charged complex ion?

Back (Answer)

The metal name ends in -ate

#20

Front (Question)

What shape do most complex ions with four ligands have, and what is the bond angle?

Back (Answer)

Tetrahedral with a 109.5 degrees

#21

Front (Question)

Which metals commonly form square planar complex ions? (NPP)

Back (Answer)

Nickel, palladium and platinum

#22

Front (Question)

What is meant by stereoisomerism in complex ions? (sme. struc. frm. - diff spat. arr. lig.)

Back (Answer)

Compounds with the same structural formula but a different spatial arrangement of ligands

#23

Front (Question)

What does “cis” (or Z) mean in square planar complex ions?

Back (Answer)

Two identical ligands are next to each other or very close

#24

Front (Question)

What does “trans” (or E) mean in square planar complex ions?

Back (Answer)

Two identical ligands that are opposite to each other