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Module 15 ­ Preparing and analysing

Task 7 ­ Volumetric calculations ­ Titrations

A
ti
tr
ati
on i
s a
preci
se met
hod used
in
chemistr
y t
o neut
ral
ize
an aci
d w i
th
an al
k al
i.

A pH i
ndi
cat…

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A. Performing a titration

1. Apparatus required to make standard solutions.










































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2. Apparatus required to perform a titration.



































3. What is a titration used for?

A
ti
tr
ati
on i
s an
a ccur
ate way of
:

P roduci
n g
a neutr
a l
sal
t
s oluti
on
w hen
a n
acid
and al
kali
ar…

Page 4

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Cal
cul
ati
ng
the
concent
rat
ion
of
eit
her
an
aci
d or
al
kal
i.

Thi
s onl
y wor
ks
if
t
he
concent
rat
ion
of
one
(ei
ther
t
h e
aci
d
or
alkal
i)
i
s accur
atel
y known.

The
concentr…

Page 5

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3 Wha t
i
s t
he conc ent
rat
ion
of
3.
6 5
g of
HCl in
1000
cm3 of
sol
uti
on?



Concentration = mol dm3






4 What i
s t
he concent
rat
ion
3
of
1
g of
N aO H i
n 250
cm…

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7 Wh a t
i
s t
he conc entr
ati
on
o f
1.
5 8
g of
KMn O4 i
n 250
c m3 of
sol
uti
on?




Concentration = mol dm3






8 Wh a t
i
s t
he conc ent
rat
ion
o f
5.
8…

Page 7

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1 Wh at i
s t
he concentr
ati
on
0 o f
25
g of
N aBr
in
100 cm3
o f
sol
uti
on?




Concentration = mol dm3







2. Calculating the mass of a solid dissolved in a solution of known volume and known
concentration.

1 Wh at…

Page 8

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3 Wh at
ma s
s of
hydrogen
chl
ori
d e,
HCl,
i
s neede d
to
make 25 cm3 o f

hydr
o c hl
ori
c aci
d sol
ution
of
a
co ncent
rat
ion
o f
1 mol
dm3?




Mass of = g







4 Wh…

Page 9

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Mass of = g









6 Wh at
mass
of
sodium
hydroxi
de, N aOH ,
i
s
needed t
o ma ke25 cm3 o
f

sodi
u m hyd r
o xi
de
so l
uti
o n
of
a concen t
rati
on of
1.0
mol dm3?








Mass of…

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Mass of = g















8 Wh at
ma ss of
p otassi
um
hydroxi
de, KO H ,
is
need ed
to make 25 cm3 of

potassi
um hydrox i
de
sol
u t
ion
of a
co nc entr
ati
on
3
of
1.0 mol dm ?









Mass of…

Comments

Faridae

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Thanks for this :)

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