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5.2 SALTS
1
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What are salts?Salts are a class of ionic
compounds that can be produced when an acid and a base react
HA + BOH BA + H2O
acid + base salt + water
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A salt is made up of a positive ionfrom a base and a negative ion from an
acid.
HA + BOH BA + H2O
acid + base salt + water
HCl + KOH KCl + H2O
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A salt is made up of a positive ionfrom a base and a negative ion from an
acid.
HA + BOH BA + H2O
acid + base salt + water
Acid – Base Neutralization
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Acid – Base Neutralization
HA + BOH BA + HOH
HA + BOH BA + H2O
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Acid – Base Neutralization
Read page 234 – 236 and do:
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Acid – Base Neutralization
page 91
WORKBOOK
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acidacid
base
acid
base
acid
acid
acid
salt
base
salt
base
acid
salt
salt
acid
salt
base
acid
acid
base
salt
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10
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Metal Oxides• Metals react with oxygen to form metal
oxides
Na2OK2OCaO
MgO
Metal Oxides
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Non - Metal OxidesNon - Metals react with oxygen to form non metal
oxides
CO2
Non - Metal Oxides
SO2
NO
CO
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Metal Oxides React with Water• when a metal oxide dissolve in
water...
MO(s) + HOH(l) MOH(aq)
MO(s) + H2O(l) …
metal oxide + water base
Na2O(s) + H2O(l) 2 NaOH(aq)
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Metal Oxides React with Water• when a metal oxide dissolve in
water...
MO(s) + HOH(l) MOH(aq)
Na2O(s) + H2O(l) 2 NaOH(aq)
The solution is BASIC
MO(s) + H2O(l) …
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Non - Metal Oxides React with Water• when a non - metal oxide dissolve
in water...
SO2(s) + H2O(l) 2 H2SO3(aq)
NO(s) + H2O(l) …
The solution is ACIDIC
non - metal oxide + water acid
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Metal Oxides and Non – Metal OxidesRead page 237 and do:
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Metal Oxides and Non – Metal Oxides
page 93
WORKBOOK
metal oxide + water base
non - metal oxide + water acid
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18
metal oxide + water base
non - metal oxide + water acid
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metal oxide + water base
non - metal oxide + water acid
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20
metal oxide + water base
non - metal oxide + water acid
acidbase
base
acid
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Metals and Acids
• Metals of Groups 1 and 2 (Alkali Metals and Alkaline Earth Metals)
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Metals and Acids
• Metals of Groups 1 and 2 (Alkali Metals and Alkaline Earth Metals) react vigorously with
water and acids
• Other metals are not that reactive with acids
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Metals and AcidsWhen a metal reacts with an acid, a salt and usually hydrogen gas is
produced
HA + M MA + H2
acid + metal salt + hydrogen
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Metals and AcidsWhen a metal reacts with an acid, a salt and usually hydrogen gas is
produced
HA + M MA + H2
HCl(aq) + Mg(s) MgCl2(aq) + H2(g)
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Metals and Acids
Read page 238 and do:
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Carbonates and Acids
CO32-
Metal Carbonates
CaCO3
MgCO3Na2CO
3K2CO3
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Carbonates and Acids
CO32-
Carbonate rocks react with acids to produce...
metal carbonate + acid salt + water + carbon
dioxide
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Carbonates and Acids
CO32-
Carbonate rocks react with acids to produce...
CaCO3 + H2SO4 CaSO4 + H2O + CO2
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5.2 Check Your Understanding
page 93
TEXTBOOK
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•Date: Wednesday, Dec 18
5.2 SALTS QUIZ