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Modul
e 15
­ Prepar
ing
and
anal
ysi
ng


Scheme of Lessons

Lesson Title Comments
The
rul
es
of
so l
ubi
li
ty
in wat
er
1 Sol
ubi
li
ty
of
sal
ts and
how i
t
is
me asur
ed
Wri
ti
ng ba lanced
symbol…

Page 2

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Keywords you must know

Acid A
compou nd
that
pr
oduce s
hydr
ogen
cat
ions
(posi
ti
ve
char
ged
i
ons)
i
n aqueous
solut
ion.


Anion A
negati
vel
y char
ged par
ti
cl
e produ ced
as
a r
esul
t
of
gai
ning
el…

Page 4

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2Na+
(
aq
)+
2OH
(
aq
)+
Cu2+
(
aq
) +
SO 2
4 (aq
)
2Na+
(
aq
) +
SO 2
4 aq
)+
Cu(
O H)2
(s
)

2OH
(
aq
)+
Cu2+
(
aq
)
Cu(
O H)2
(s)


[i
oni
c equat
ion…

Page 5

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Meniscus The cur
ved appear
ance of
li
quid
seen
in
a pi
pet
te,
measuri
ng
cyl
i
n der
or
buret
te.

The level
of
t
he
li
qui
d
is
measured
to
the
bot
tom of
the
me ni
scus.







Molar mass The
mass
of
1 mol…

Page 6

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Relative Thi
s i
s t
he aver
ag e mass
of
the
element
expr
essed i
n t
erms of

atomic mass t
he mass of
1/
12
th
of
t
he
ma ss
of
isot
ope
of
carbon
that
has
a
(Ar) mass of
12.
0000

Page 7

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Relative The
sum of
the r
elat
ive
atomic
ma sses
of
all
t
he at
oms
present

molecular i
n a
molecule
of
an el
eme nt
or
comp ou nd.

T hi
s
is
als
o
cal
led
mass t
he r
elat
ive
formula
ma ss
(RFM),…

Page 8

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Titration The
me t
hod used
to
react
an
acid
w i
t h
an al
kal
i
so
that
onl
y a
sol
uti
on
of
salt
and
w at
er
are
produce d.
An
indi
cat
or
is
used t
o
det
ermine
the
point
of
neut
ral…

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