Lenka Lehtinen
what is a redox reaction? =
a reaction where reduction and oxidation reaction takes place attire same
time
Oxidation When an element in a substance loses electrons / oxidation number
•
when does oxidation occur?
-_
increases
- what is the substance that •
substance that goes through oxidation -
reducing agent
undergoes oxidation? n → a
"
+
e- this oxidised : makingit-rereducingage.int
when does reduction occur? a
reduction -_ wvenaneiementinasnbs-ancegainselec.twnsl oxidation number
- what is the substance that decreases
undergoes reduction? -
substance that goes through reduction -
oxidising agent
N + e- →
vi. his reduced : making it the oxidising agent
Oxidation number the charge ofanatomintre substance would have
what is oxidation number?
.
=
when it exists as ions in the compound / if electrons
- oxidation number of an element were transferred completely
- oxidation number of any chemical 1) the oxidation number of an element in its elemental form -_ 0
species He ,Fz Al K , , ,
02 Ar ,Ne
,
- elements with similar oxidation 2) the oxidation numberinanychemicaispeciesmus-sum-ot.ve overall charge
numbers on the species
•
molecule sum up -_ 0
•
oxidation number Ofamonoatomicion =
charge on the ion
Br
-
-
oxidation number -_ -
l
'
must sumupto-hechargeonanypolya-omic.im
3) some elements have similar oxidation number
ELEMENT OXIDATION NUMBER EXCEPTION
Flonrive -1 When it exists as an element
Fzoxi number -_ 0
group / A- or +1 and -12
DNUPZA metal respectively
Hydrogen +1 any combination with a group
IAORZAmetalform-oformame-alhydride.HN/inO.=-l
-2
Oxygen any combination with something
higher on the list that necessitates
its having a different oxino .
Oxino for 0in
.
1-1202=-1
Oxino for 0in K0z=
-
-
É
-1
group 7A Other any combination with something
thanflonrive higher on the list that necessitates
its having a different oxino .
1) redox atoms first otter than Hand Oatom
a redox reaction must have 2) balance the equation with Hzoontvesidewi-hon-O.balance the equation
- steps to balancing the chemical with Hontvesidewithonttl
equation 3) balance change onbothsideofeqna-ionbyaddingelec-ronson-vesi.de
with the higher charge
what is a redox reaction? =
a reaction where reduction and oxidation reaction takes place attire same
time
Oxidation When an element in a substance loses electrons / oxidation number
•
when does oxidation occur?
-_
increases
- what is the substance that •
substance that goes through oxidation -
reducing agent
undergoes oxidation? n → a
"
+
e- this oxidised : makingit-rereducingage.int
when does reduction occur? a
reduction -_ wvenaneiementinasnbs-ancegainselec.twnsl oxidation number
- what is the substance that decreases
undergoes reduction? -
substance that goes through reduction -
oxidising agent
N + e- →
vi. his reduced : making it the oxidising agent
Oxidation number the charge ofanatomintre substance would have
what is oxidation number?
.
=
when it exists as ions in the compound / if electrons
- oxidation number of an element were transferred completely
- oxidation number of any chemical 1) the oxidation number of an element in its elemental form -_ 0
species He ,Fz Al K , , ,
02 Ar ,Ne
,
- elements with similar oxidation 2) the oxidation numberinanychemicaispeciesmus-sum-ot.ve overall charge
numbers on the species
•
molecule sum up -_ 0
•
oxidation number Ofamonoatomicion =
charge on the ion
Br
-
-
oxidation number -_ -
l
'
must sumupto-hechargeonanypolya-omic.im
3) some elements have similar oxidation number
ELEMENT OXIDATION NUMBER EXCEPTION
Flonrive -1 When it exists as an element
Fzoxi number -_ 0
group / A- or +1 and -12
DNUPZA metal respectively
Hydrogen +1 any combination with a group
IAORZAmetalform-oformame-alhydride.HN/inO.=-l
-2
Oxygen any combination with something
higher on the list that necessitates
its having a different oxino .
Oxino for 0in
.
1-1202=-1
Oxino for 0in K0z=
-
-
É
-1
group 7A Other any combination with something
thanflonrive higher on the list that necessitates
its having a different oxino .
1) redox atoms first otter than Hand Oatom
a redox reaction must have 2) balance the equation with Hzoontvesidewi-hon-O.balance the equation
- steps to balancing the chemical with Hontvesidewithonttl
equation 3) balance change onbothsideofeqna-ionbyaddingelec-ronson-vesi.de
with the higher charge
