Titrations summary

Here is the titrations summary for the AQA chemistry triple award: everything you need to know

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Ti
tr
ati
ons
A cid +
alkali me tal
s a l
t
+w ater Usu al
ly
neutr
a l
i
sa t
ion.
N e ed
to kno w
the
me th od
of
tit
rati
ons:
T his w i
ll
usu a l
l
y be
a s i
x mark
questi
o n.
1 . We ar
go ggles w h i
lst
carryi
ng o ut
t
he
pract
ical.
2 .U se
a burett
e i
n a r
eto r
t
stand.
3 . Wa sh out
the b ur
e t
te
w it
h t
h e
s ubstance (
usu al
ly
an aci
d) t
hat
you
are usi
ng t
o avoi
d cont
aminati
on
u si
n g a f
ilt
er f
u n ne l
wi
th a mea suri
ng
cyli
nde r
at
t
h e
bottom f
or excess
acid.
4 .A dd
th e
s ubsta n ce
(us ual
ly
an al
kali
)
in
a
con i
cal
fl
ask usi
ng a
me asu r
ing
cyli
nder.
5 .F i
lt
e r funnel
th e
su bst
a nce i
n.
6 .T ake the f
un ne l
o ut
to pr
e vent
a dded dosage.
7 .A dd
in di
ca t
or d e pending on t
he t
ype of
acid/
a l
kali
(
phen ol
phthal
ein/methyl
orange)
.
8 .A lwa ys read fro m the bott
om of t
he me ni
scus.
3
9 .A dd
1 cm f
or a ccu r
ate resul
ts.
1 0.S ha ke
it
every ti
me 1cm3
has b een added t
o
secure t
he i
nd i
cat
o r
has mixed
successf
u l
l
y.
1 1.R ea d
off
the e n d
p oi
nt.
1 2.D o th e
e xperi
me nt
aga i
n
for
i
mp r
o ved
result
s as
the f
ir
st t
ime was a pr
eli
minary.
1 3.R ep e at
the exp er
ime nt unt
il
t
h ey ar
e
the
sa me readi
ng s.
1 4.D o it
a gain with out
indicator
t
o get
pure
resu l
ts.
1 5.If
the que st
ion ask s
for
C RY ST ALS then pl
ace i
t
in an
eva por
ati
ng
basin
in
tri
pod over
a
B unsen
b ur
n e r
an d t
he n evapo r
ate i
t.
Titration calculations:
st
M1 v1=
m2 v
2
Mo lar
it
y o f
t
he 1 solut
ion t
imes
the
vo l
ume
of t
he f
ir
st
s ol
uti
on i
s equal
t
o t
he mo l
ari
ty
st
of t
he
1 solut
ion ti
me s
the vol
u me of
the
se cond
solut
ion.
E xa m ques t
io n
s t
yle:
1 M x 25cm3 =
? x 20c m3
2 5/20
= ?
1 .25M
= ?
A MO LE
is the relat
ive
mo l
e cular
ma ss di
ssolved i
n one l
it
re.
H owever
one
mo l
e of
gas t
akes up
24 l
it
res
at
r oom temp e ratur
e
an d pressu r
e.

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