Potatoes Reaction with water
PERIOD 3 OXIDES
Nature of
Oxide Mpt (ºC) Structure & comments Reaction with acids Reaction with alkalis
What happens Equation & comments pH oxide
Dissolves i.e
“Dissolves” (i.e. Nazo 2NaOHlag
H2O 2NaOH(aq)
Na2O +H2O
1min
+
ffottt eE
1275 dissolves and then + 2- Na2O + 2 H
i
The Na and O ions dissolves in
Effefat.tn mice
Na2O Ionic 14 + basic
(solid) reacts with water to 2-
water and then the O ions react with 2Na + H2O
form a solution) 2-
water: O + H2O 2 OH
-
MgO + H2O Mg(OH)2(aq)
iro
“Slightly soluble”
oomaa
Ionic (higher melting point
eee eiaceegfIfe
iii.EE
2+ 2-
(i.e. some dissolves Some Mg & O ions dissolve in water
andandisson
2+ +
2900 than Na2O as the Mg ions MgO + 2H
e as
eei
MgO then reacts with (less soluble than Na2O due to higher 10 basic
EMEE.it 2+
eee
(solid) are smaller and higher 2- Mg + H2O
+ water to form a lattice enthalpy) and then the O ions
charged than Na ) 2- -
solution) react with water: O + H2O 2 OH
Ionic (not as high a melting
n
togidaat affino
point as expected due to -
EEtmkkafeeedia.name
+
2040 Insoluble due to very high lattice Al2O3 + 6H Al2O3 + 2OH + 3H2O
aporia
Al2O3 some covalent character Insoluble 3+ - amphoteric
(solid) enthalpy 2Al + 3H2O 2 Al(OH)4
due to polarising nature of
AFians
3+
Al ions)
Insoluble dueto lattice oflinked
Insoluble due to lattice of atoms
SiO2 + 2OH
-
2-
Gwent luble SiO3 + H2O
amaneatannan ride
1610
SiO2 Giant covalent Insoluble by strong covalent bonds that would acidic
(solid) (must be hot,
have to be broken
to be broken concentrated NaOH)
Simple molecular
simple P4O10 + 6H2O 4H3PO4
P0
Py ,0 1204 -
tÉtdtt
it E
580 molecular 4O10 + 12OH
P4O10
(solid)
Enema
(but quite a
big molecule)
reaaintly
Reacts violently
ffgg
H2O molecules attach the + P atoms,
+
d0
leading to the release of H ions from
0
faradic
3-
4PO4 + 6 H2O
acidic
the water molecules.
simple
“Dissolves” i.e
Dissolves (i.e. 5022
120 SO
SO + H O H 12503
2 2 3
502 20H-
-75 Simple dissolves and then H2O molecules attach the + S atoms, SO2 + 2OH
4FM di
ftp.t
SO2
mowar 3
t.tn
acidic
gg
2-
dsanaaaaagaf.fsEc
(gas) molecular reacts with water to +
leading to the release of H ions from SO3 + H2O
form a solution) the water molecules.
simple
SO3 + H2O H2SO4 503 20H -
kctg
17 Simple SO3 + 2OH
mbar d
H2O molecules attach the + S atoms,
Paainty
gfEa Total
SO3 Reacts violently 0 2- acidic
(liquid?) molecular +
leading to the release of H ions from SO4 + H2O
the water molecules.
© www.CHEMSHEETS.co.uk
coaches 14-June-2016 Chemsheets A2 1073
PERIOD 3 OXIDES
Nature of
Oxide Mpt (ºC) Structure & comments Reaction with acids Reaction with alkalis
What happens Equation & comments pH oxide
Dissolves i.e
“Dissolves” (i.e. Nazo 2NaOHlag
H2O 2NaOH(aq)
Na2O +H2O
1min
+
ffottt eE
1275 dissolves and then + 2- Na2O + 2 H
i
The Na and O ions dissolves in
Effefat.tn mice
Na2O Ionic 14 + basic
(solid) reacts with water to 2-
water and then the O ions react with 2Na + H2O
form a solution) 2-
water: O + H2O 2 OH
-
MgO + H2O Mg(OH)2(aq)
iro
“Slightly soluble”
oomaa
Ionic (higher melting point
eee eiaceegfIfe
iii.EE
2+ 2-
(i.e. some dissolves Some Mg & O ions dissolve in water
andandisson
2+ +
2900 than Na2O as the Mg ions MgO + 2H
e as
eei
MgO then reacts with (less soluble than Na2O due to higher 10 basic
EMEE.it 2+
eee
(solid) are smaller and higher 2- Mg + H2O
+ water to form a lattice enthalpy) and then the O ions
charged than Na ) 2- -
solution) react with water: O + H2O 2 OH
Ionic (not as high a melting
n
togidaat affino
point as expected due to -
EEtmkkafeeedia.name
+
2040 Insoluble due to very high lattice Al2O3 + 6H Al2O3 + 2OH + 3H2O
aporia
Al2O3 some covalent character Insoluble 3+ - amphoteric
(solid) enthalpy 2Al + 3H2O 2 Al(OH)4
due to polarising nature of
AFians
3+
Al ions)
Insoluble dueto lattice oflinked
Insoluble due to lattice of atoms
SiO2 + 2OH
-
2-
Gwent luble SiO3 + H2O
amaneatannan ride
1610
SiO2 Giant covalent Insoluble by strong covalent bonds that would acidic
(solid) (must be hot,
have to be broken
to be broken concentrated NaOH)
Simple molecular
simple P4O10 + 6H2O 4H3PO4
P0
Py ,0 1204 -
tÉtdtt
it E
580 molecular 4O10 + 12OH
P4O10
(solid)
Enema
(but quite a
big molecule)
reaaintly
Reacts violently
ffgg
H2O molecules attach the + P atoms,
+
d0
leading to the release of H ions from
0
faradic
3-
4PO4 + 6 H2O
acidic
the water molecules.
simple
“Dissolves” i.e
Dissolves (i.e. 5022
120 SO
SO + H O H 12503
2 2 3
502 20H-
-75 Simple dissolves and then H2O molecules attach the + S atoms, SO2 + 2OH
4FM di
ftp.t
SO2
mowar 3
t.tn
acidic
gg
2-
dsanaaaaagaf.fsEc
(gas) molecular reacts with water to +
leading to the release of H ions from SO3 + H2O
form a solution) the water molecules.
simple
SO3 + H2O H2SO4 503 20H -
kctg
17 Simple SO3 + 2OH
mbar d
H2O molecules attach the + S atoms,
Paainty
gfEa Total
SO3 Reacts violently 0 2- acidic
(liquid?) molecular +
leading to the release of H ions from SO4 + H2O
the water molecules.
© www.CHEMSHEETS.co.uk
coaches 14-June-2016 Chemsheets A2 1073
