Double Replacement Reactions

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Double Replacement Reactions
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Predicting Solubility
High Solubility means that a lot of compound will
dissolve in water (gt 0.1 moles per 1 L)
Low Solubility means very little compound will
dissolve in water (lt 0.1 moles per 1 L)
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K2SO4
High Solubility
AgCl
Low Solubility
BaCl2
Ba2
High Solubility
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Cu2
CuI2
High Solubility
PbSO4
Low Solubility
CoS
Co2
Low Solubility
Rb2SO3
High Solubility
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Double replacement reactions occur when the metal
ions of two aqueous compounds switch places.
A formation of a precipitate, a compound with low
solubility, causes the reaction to occur.
AgNO3(aq) NaCl (aq) ?
NaNO3
(aq)
(s)
AgCl
low solubility
high solubility
You must have at least one low solubility product
to have a reaction!
Note low is (s) and high is (aq)!
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Al3 OH-
Sr2 NO3-
Sr(OH)2(aq) Al(NO3)3 (aq) ?
Sr(NO3)2
Al(OH)3
(s)
(aq)
3
2
3
2
Al 3
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HNO3
CaSO4
(s)
(aq)
2
H2SO4(aq) Ca(NO3)2(aq) ?
high
low
MgCl2(aq) Na2SO4(aq) ?
MgSO4
NaCl
(aq)
(aq)
no reaction
high
high
Sr(OH)2(aq) BeSO4(aq) ?
SrSO4
Be(OH)2
(s)
(s)
low
low
two reactions
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Double replacement reactions occur when something
new is produced. If a product is solid, liquid,
or gas, the reaction will happen.
Neutralization Reactions
HCl(aq) NaOH(aq) ?
NaCl(aq) HOH(l)
Acid Base ?
Salt Water
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Double replacement reactions occur when something
new is produced. If a product is solid, liquid,
or gas, the reaction will happen.
Acid Carbonate Reactions
2HNO3(aq) Na2CO3(aq) ?
2NaNO3(aq) H2CO3(aq)
2HNO3(aq) Na2CO3(aq) ?
2NaNO3(aq) H2O(l) CO2(g)
carbonic acid breaks down to form carbon dioxide
and water
Mento craziness
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