The document discusses the key properties of acids including their ability to ionize in water and produce hydrogen ions (H+). It specifically addresses the concepts of acid basicity, which refers to the number of H+ ions produced per acid molecule. Monoprotic acids produce 1 H+, diprotic acids produce 2 H+, and triprotic acids produce 3 H+. Examples provided include hydrochloric acid (HCl) as monoprotic, sulfuric acid (H2SO4) as diprotic, and phosphoric acid (H3PO4) as triprotic. The document also notes that acids have a sour taste, change litmus paper to red, are corrosive, and have a pH less

1. ACIDS
An ACID is a
chemical substance
that ionise or
dissolved in water
to produce
hydrogen ions, H+.
That's right,
John. Do you
know how many
are the basicity
of an acid?
An acid can be
classified to 3
basicity which are
MONOprotic,
DIprotic and
TRIprotic.
But I don't get it
teacher. What is the
meaning of BASICITY?
Very good,
John!
Can anyone tell
me what an
ACID is?
Alright class,
our lesson
for today is
about
ACIDS.
There are 3.
Good question, Charlie!
Basicity refers to the
number of hydrogen
ions, H+ that can be
produced by one acid
molecule that ionises in
water.
by estherannerandyy

2. A diprotic acid will
ionise in water to
produce TWO
hydrogen ions, H+
per acid molecule.
(Di = two).
Correct! An example of
diprotic acid is sulphuric
acid, H2SO4.
What is the ionisation
equation for sulphuric
acid, H2SO4?
One sulphuric acid molecule,
H2SO4 will ionise in water to
produce two hydrogen ions, H+.
So the equation will be
H2SO4 -> 2H+ + SO4^2-
Let me try!
A triprotic acid will
ionize in water to
produce THREE
hydrogen ions, H+
per acid molecule.
Great job, John!
Now can you
guess, what a
triprotic acid is?
Now what
about a
diprotic acid?
A monoprotic acid will
ionise in water to
produce ONE
hydrogen ions, H+ per
acid molecule.
(Mono = one)
Example of
monoprotic acid is
hydrochloric acid, HCl.
HCl -> H+ + Cl-

3. That's right, Charlie!
An example of triprotic
acid is phosphoric acid,
H3PO4.
Try form the ionisation
equation for phosphoric
acid, H3PO4.
One phosphoric acid
molecule, H3PO4 will ionise
in water to produce three
hydrogen ions, H+.
So the equation will be
H3PO4 -> 3H+ + PO4^3-
Very good, Charlie!
Next, let's talk
about the
PROPERTIES of
ACID.
Acid TASTES
SOUR and can
CHANGE BLUE
LITMUS PAPER
TO RED.
That's right,
Maya!
Acids are also
CORROSIVE and have
pH value LESS THAN 7,
right teacher?
Very good!
Next we are going
to look at BASE
and ALKALI.
Stay tune!