Back to marketplace

24 reaction of aqueous ions

No description yet. This curated deck is ready for daily study.

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

Card preview (24)

#1
Front (Question)

define hydration enthalpy

Back (Answer)

the standard enthalpy change when one mole of gaseous ions is converted to one mole of aqueous ions

#2
Front (Question)

when ions are hydrated what are positive ions attracted to?

Back (Answer)

slightly negative oxygen in water molecules

#3
Front (Question)

when ions are hydrated what are negative ions attracted to?

Back (Answer)

slightly positive hydrogens in water molecules

#4
Front (Question)

what is a complex ion?

Back (Answer)

central atom or ion surrounded by ligands

#5
Front (Question)

what is a coordinate bond?

Back (Answer)

shared pair of electrons that have both come from the same atom

#6
Front (Question)

define ligand

Back (Answer)

ion or molecule with a lone pair of electrons which can form a coordinate bond with a transition metal ion

#7
Front (Question)

define coordination number

Back (Answer)

number of coordinate bonds a transition metal ion forms

#8
Front (Question)

what are 4 hexa aqua complex ions?

Back (Answer)

[Cu(H2O)6]2+ [Fe(H2O)6]2+ [Fe(H2O)6]3+ [Al(H2O)6]3+

#9
Front (Question)

what is each hexa aqua complex ion’s colour?

Back (Answer)

[Cu(H2O)6]2+ = blue solution [Fe(H2O)6]2+ = pale green solution [Fe(H2O)6]3+ = yellow brown solution [Al(H2O)6]3+ = colourless solution

#10
Front (Question)

what colour is [Cu(H2O)6]2+?

Back (Answer)

blue solution

#11
Front (Question)

what colour is [Fe(H2O)6]2+?

Back (Answer)

pale green solution

#12
Front (Question)

what colour is [Fe(H2O)6]3+?

Back (Answer)

yellow brown solution

#13
Front (Question)

what colour is [Al(H2O)6]3+

Back (Answer)

colourless solution

#14
Front (Question)

which hexa aqua complex ions are more acidic?

Back (Answer)

3+ ions

#15
Front (Question)

why are the 3+ ions more acidic?

Back (Answer)

smaller with higher charge more polarising attracts lone pair in O weakens O-H can release H+ more easily

#16
Front (Question)

write an equation to show [Fe(H2O)6]3+ acting as an acid

Back (Answer)

[Fe(H2O)6]3+ -> [Fe(H2O)5(OH)]2+ + H+

#17
Front (Question)

what 3 things do all the hexa aqua complex ions react with?

Back (Answer)

Na2CO3 NaOH NH3

#18
Front (Question)

how does [Fe(H2O6)]2+ react with Na2CO3? state the observation

Back (Answer)

[Fe(H2O)6]2+ + CO3 2- -> FeCO3 (s) + 6H2O green solution -> green precipitate

#19
Front (Question)

how does [Fe(H2O6)]2+ react with NaOH? state the observation

Back (Answer)

[Fe(H2O6)]2+ + 2OH- -> [Fe(H2O)4(OH)2] (s)+ 2H2O green solution -> green precipitate

#20
Front (Question)

how does [Fe(H2O6)]2+ react with NH3? state the observation

Back (Answer)

[Fe(H2O6)]2+ + 2NH3 -> [Fe(H2O)4(OH)2] (s) + 2NH4+ green solution -> green precipitate

#21
Front (Question)

how does [Cu(H2O)6]2+ react with Na2CO3? state the observation

Back (Answer)

[Cu(H2O)]2+ + CO3 2- -> CuCO3 (s) + 6H2O blue solution -> blue green precipitate

#22
Front (Question)

how does [Cu(H2O)6]2+ react with NaOH? state the observation

Back (Answer)

[Cu(H2O)6]2+ + 2OH- -> [Cu(H2O)4(OH)2] (s) + 2H2O blue solution -> blue precipitate

#23
Front (Question)

how does [Cu(H2O)6]2+ react with NH3? state the observation

Back (Answer)

[Cu(H2O)6]2+ + 2NH3 -> [Cu(H2O)4(OH)2] (s) + 2NH4+ blue solution -> blue precipitate

#24
Front (Question)

what other equation can also happen after [Cu(H2O)6] has reacted with 2NH3?

Back (Answer)

can react with an excess of ammonia