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Summary IB Chemistry Topic 9/19 Redox Processes
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IB chem topic 9/19 summary notes
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forgive 911 9⑧HIAWATHA * WEINHEIM
Reduction
Znsoycaqytlucs,
°
Oxidation
Znisjtlusoqcaq,
0 °
→
loss gain e-
•
displacement metal of less reactive metal
•
e- rxn : more reactive displaces
•
ions
loss H It
gain
• •
0 loss 0
gain
• •
•
tinoxi .
state
•
doxi .
state
reducing agent oxidizing agent
•
•
Disproportionation Batanceredoxeqslinaeidie solutions )
• •
•
hedoxinuhich / species is oxidized and reduced at sometime •
add e- H2O ,
Ht
,
2Hz02(aq, →
242%1+029, botheq #
•
•
-
same es
ti -
I 1- I -2 c
0AA-ivity-en.es WinklerMethod__
°
•
top :
strong reducing agents oxidized determine concentration of dissolved in water sample
readily oxygen a
•
mote
-
bottom less oxidized biochemical ( BOD)
tveakreduuing agents readily Measure
• •
demand
oxygen
: -
used to predict ifa displacement reaction wikoaur
102-74520--2
• • -
tmoutiveifitbasmesionspomsolid two sample water cslluted
•
one
immediately tested
•
sample
-
•
norxnif solid metal dreoutuiethanaqions 1021 +
selsndsamplestoredindarkfor 5 days atbhstant
•
metals freakin than It will displace # ions from temp + after 5 days 1021 determined
solution to form
Helgi •
steps :
this)t2Hdcaq→ Znclzcaq , + Hug,
"
•
molszoz
-
1000mg -1g -
↳ this
)t2HYaq , -72h "(aq Hzcg , ,
+ -
Moltz → mass 02
Mdma ppm
=
Metals trait've thank cshctz
• -
-
norxn
" " ""
↳
Cnisitltcliaoptnorxn
-
BOD -
-
intima ] -
finally] 5.3111:÷yaean%f"p?iiIe%
°Redoxratin
" " Potassium manganate
Fe oxidized to Fe oxidizing agent
•
determines csnc .
of an analyte containing either
•
by an "
dichromate
Felt Fest + g-
reducing agent
↳
oxidizing
an or -2
Steps
•
① moloftlnoy ln=cI ② motte Fe
-
find amount of Fein
→ mass
sample
•
a
③ mmTnampeHN%
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