13.2a Developing a Redox table. the relative reactivity of metals can be used to determine which...
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Transcript of 13.2a Developing a Redox table. the relative reactivity of metals can be used to determine which...
![Page 1: 13.2a Developing a Redox table. the relative reactivity of metals can be used to determine which redox reactions are spontaneous In all redox reactions,](https://reader033.fdocuments.in/reader033/viewer/2022051215/5697bf891a28abf838c8a17c/html5/thumbnails/1.jpg)
13.2a Developing a Redox table
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the relative reactivity of metals can be used to determine which redox reactions are spontaneous
In all redox reactions, electrons aretransferred from a reducing agent(RA) to an oxidizing agent (OA)
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list of elements in decreasing order of their reactivity, or ability to react chemically in aqueous solution
most active elements appear at the top of the table bottom right of ½ rxtn table
reactivity decreases as we move down the list decreases as we move up the right side of ½ rxtn
table under ordinary conditions each element in the
table can replace any element that appears below it above it on ½ rxtn table
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Activity Series of Metals
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a more active element displaces a less active element in a compound metals displace metals or H
Cu + 2 AgNO3 Cu(NO3)2 + 2 Ag
Mg + 2 HCl MgCl2 + H2
nonmetals displace nonmetals2 KI + Br2 2 KBr + I2
carbon displaces metals from oxides3 C + Fe2O3 3 CO + 2 Fe
always redox
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Al + Zn(NO3)2 Al (NO3)3 + Zn
Aluminum is higher than zinc so it replaces zinc in the compound Zn(NO3)2
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KBaSrCaNaMgAlMnZnCrFeCdCoNiSnPbHSbAsBiCuHgAgPdPtAu
displace H2
fromcoldH2O
fromsteam
fromacids
react
wit
h O
2 in t
he a
ir t
o m
ake
oxid
es
Fe is above Cu, so Cu metalwill not displace Fe2+
KBaSrCaNaMgAlMnZnCrFeCdCoNiSnPbHSbAsBiCuHgAgPdPtAu
displace H2
fromcoldH2O
fromsteam
fromacids
react
wit
h O
2 in t
he a
ir t
o m
ake
oxid
es
Gold is at thebottom, so it is
very unreactive.
KBaSrCaNaMgAlMnZnCrFeCdCoNiSnPbHSbAsBiCuHgAgPdPtAu
displace H2
fromcoldH2O
fromsteam
fromacids
react
wit
h O
2 in t
he a
ir t
o m
ake
oxid
es
Zn is above H,so Zn will react with acids
Zn + Fe2+ Fe + Zn2+
listing of metals by reactivity
free metal higher on the list displaces metal cation lower on the list
metals above H will dissolve in acid
Cu + Fe2+ no reactionZn + 2 H+ H2 + Zn2+
KBaSrCaNaMgAlMnZnCrFeCdCoNiSnPbHSbAsBiCuHgAgPdPtAu
displace H2
fromcoldH2O
fromsteam
fromacids
react
wit
h O
2 in t
he a
ir t
o m
ake
oxid
es
Fe is below Zn, so Zn metalwill displace Fe2+
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Mg is aboveCu on theActivity Series
Mg will react with Cu2+ to form Mg2+
and Cu metal
but Cu will not react with Mg2+
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Mg + H3PO4
Cu + H2SO4
Al + Fe2+
Predict whether the following will occur
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Mg + H3PO4 Mg3(PO4)2 + H2
Cu + H2SO4 no reaction
Al + Fe2+ Al3+ + Fe
Sol’nSol’n
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http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/redox/home.html
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Predict whether the following will occur
Cu + HCl CuCl2 + H2
H2 + CuO H2O + Cu
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Sol’nSol’n
Predict whether the following will occur
Cu + HCl CuCl2 + H2 no
H2 + CuO H2O + Cu yes
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Textbook p571 #2-7 LSM 13.2C (top half)