Neutralisations in Everyday Life Video Lecture | Science Class 7

hello friends this video on acids bases
and salts part 10 is brought to you by
exam feel calm no more fear from exam so
now we have been talking about acids and
bases so much so let us look at some of
the examples in our day-to-day life
where we see the role of acids and bases
so one such example is in digestion
now how did it ever happen to you that
you eat some unhealthy food use it some
junk food you eat all you eat a lot of
oil he stops and then the next day you
feel discomfort in your stomach you feel
pain in your stomach you kind of feel a
burning sensation in your stomach so
what what why does that happen that
happens due to indigestion because the
food doesn't get digested properly so in
one of our previous lessons we have
discussed in detail about how food gets
digested so during ization the food
which we eat through our mouth it
encounters a lot of enzymes secreted by
the saliva in our mouth secreted by the
enzymes which are present in our stomach
and small it this time and as a result
of the action of these enzymes the food
is broken down into simpler forms which
are absorbable and that is what we call
this digestion now when you talk about
the stomach so in the stomach there is
an acid which is present that is
hydrochloric acid now do you do this
acidic medium in the stomach they are
there a lot of advantages now there a
lot of germs which might be present in
our food get died or they get disabled
in this acidic medium also this acidic
medium enables a enzyme called pepsin
and this enzyme helps with the digestion
of proteins so that is also another
important advantage of having this
acidic medium in the stomach but when in
digestion happens or when you get that
burning sensation in your stomach that
happens due to increased acidity
means increased concentration of this
hydrochloric acid in the stomach now
when you have too much of acid in in
some place or when you have too much of
acid in your stomach how do you reduce
the effect of that acid by putting some
base into it because base will
neutralize the effect of acid that is
what we learn in neutralization reaction
right so in this case what do you do
holding be known will you do we take
some tablets the antacid tablets like
die gene right so what do these antacid
tablets do antacid that means empty acid
so it is they will work just opposite to
acid so these are nothing but these
antacid tablets
they contain basic solutions what kind
of let me give you some examples of
basic solutions for example magnesium
hydroxide so this is a base or aluminium
hydroxide aluminium hydroxide when
magnesium hydroxide these are all bases
and these type of basic solutions are
present in the head acid tablets so when
you consume the entire tablet it goes
into your stomach and there the base the
bases will actually neutralize the
effect of the acid and that is how the
acidity level in your stomach will
reduce and you will start feeling better
and the process of digestion will happen
properly so this is how the antacid
tablets work so even inside our body we
have acids and bases working for proper
functioning of our body so let's look at
another example have you ever come
across somebody who have undergone an
ant bite so the big ants sometimes where
they bite you what happens so some acid
gets injected and that is why that
entire area gets swollen it has a lot of
pain and sometimes that infection
scrapes to other parts of the body also
so what happens actually is this ant
they continue they inject when they bite
they actually inject formic acid inside
your body
now when formic acid is
in injecting inside your body so due to
the effect of that acid all these
side-effects come up all these
consequences which we see that come up
due to this formic acid so how do we
cure it so how do I mean how do we come
out of it so for that we have this
remedy of moist baking soda so this
baking soda is basic in nature baking
soda is nothing but sodium bicarbonate
so that is na hco3 that is baking soda -
baking soda means baking soda along with
some water so when you put this so this
basic nature of baking soda will
neutralize the effect of this asset that
is formic acid and that is how the
effect of the acid will be reduced and
you will be cured of the effects of and
white so let's talk about the soil
treatment whenever we talk about crop
productivity and when we talk about
agriculture we also talked about manuals
and fertilizers and these are the things
which help us to increase the crop
productivity they help in better growth
of plants so what are these manuals and
fertilizer and why do we add them to the
soil because these fertilizers they
contain chemical substances which
increase the fertility of the soil now
why do we add them and what do they
contain now the it has been observed
that so why do we add these additional
things to the soil so what we want to
ensure is the soil should neither be too
acidic not too busy because if the soil
becomes too acidic or excessive basic in
both the cases it doesn't promote the
growth and development of the plants so
what do we do when the soil becomes too
acidic when too much of acid gets
accumulated in the soil
what does soil basically so I contains
lot of water soil contains dissolved
minerals so I will contain so many
different chemical substances in it
in fact the fertilizers which we apply
to the soil they are also nothing but
chemicals so all these chemicals in here
theory their axes
in nature or basic in nature or they
maintain neutral also so when the soil
turns too much acidic in that case it is
treated with bases so because extreme
acids they called extreme basic soil can
adversely affect the crop productivity
so let's see what do we do in these
cases when the soil becomes extreme
acidic then we treat it with bases so
what kind of bases do be applied to the
soil for example calcium oxide calcium
hydroxide all these things are purposely
added to the soil so that the bases can
actually neutralize the excessive acid
present in the soil and that's how the
acidic nature of the soil can be reduced
to some extent now similarly if the soil
is extremely basic in that case what
should be done it should be treated with
fertilizers and these fertilizers what
are these these are nothing but chemical
substances so these fertilizers or the
organic matter they also release acids
in the soil so these acids will
neutralize the effect of the bases and
that's how it will reduce the basic
nature of the soil so depending upon the
need of the soil a respective fertilizer
organic matter or bases are added to the
soil so even for the growth and
development of plants soil which is
number one of the most important factor
they're all so busy acids and bases play
a very important role thank you please
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