This document discusses different types of solutions that Anu observed in her lab. It introduces three different solutions and poses discussion questions about each one. The consolidation sections then reveal that solution 1 is a colloid, solution 2 is also a colloid, and solution 3 is a suspension. Key differences are discussed, such as particle size and visibility of light passing through each solution. Colloids have small particles that do not settle out and allow light to pass through, while suspensions have larger particles that reflect light and can settle out. A true solution is also mentioned as having particles too small to be seen that do not settle out or allow light to be visible as it passes through.
2. Introduction
Anu was a student .one day she was
in lab and she was standing near a
shelf which contain some solution
bottles. Sunlight is falling on these
bottles through window .Anu noticed
that path of the light is visible in
some solutions, in others path of
light is not visible .she got confused,
these were all solutions but why they
don't act as same?
3.
4. DISCUSSION POINTS
1.What are the substances in solution 1?
2.What are the substances in solution 2?
3.What are the substances in solution 3?
4.After keeping the solutions in an
Undisturbed mode what do you observe in
first solution?
5.What about solution 2?
6What about Solution 3?
5. CONSOLIDATION
In solution 1 particles in the solution do not
settle down
In solution 2 particles of the solution do not
settle down
In solution 3 particles of the solution settle
down
6.
7. DISCUSSION POINTS
1.
2.
3.
4.
5.
6.
7.
When we pass light through first solution can we see the
path of light through the solution?
What about the size of particles in the first solution ,are
they very small or big?
When we pass light through second solution can we see
the path of light through the second solution?
What about the size of particles of the second solution
compared to the first solution?
When we pass light through the third solution can we see
the path of light through the third solution?
In the third solution can we saw the light reflected from it?
What about the size of particles of the third solution when
compared to the first and second solution?
8. CONSOLIDATION
In solution 1-the particle size is so small that it
cannot be seen with the naked eye since these
particles are very minute they cannot scatter a beam
of light. Hence the path of light beam is not visible
In solution 2- the size of particles is greater than the
size of particles in solution 1 so it can scatter beam
of light and we can see the path of light through the
solution 2
In solution 3 -the particle size is bigger it can scatter
the beam and reflect the beam of light hence the
path of the light beam is clearly visible through the
solution3.
9.
10. Discussion points
1.
2.
3.
4.
5.
6.
7.
8.
9.
Can we separate the particles of solution 1 through the filter
paper?
Can we separate the particles of solution 2 through the filter
paper?
Can we separate the particles of solution 3 through the filter
paper?
So from this 3 videos what are the properties do you
understand about the solution 1?
What are the properties of solution 2?
What are the properties of solution 3 ?
Do you know the name of solution 1?
Do you know the name of solution 2?
Do you know the name of solution 3?
11. CONSOLIDATION
COLLOID
In colloid the size of
solute particles present
in the solution is small
it cannot be seen with
naked eyes ,the
particles of the solution
does not settle down
when it is placed
undisturbed, in a colloid
the path of light beam
is visible, in a colloid
the particle cannot be
separated by filtration
SUSPENSION
In a suspension the
particles is big enough
and it can be seen
with naked eyes, the
particles of the
solution will settled
down when it is placed
undisturbed, the light
falling on this type of
solution is reflected
almost completely ,
the particles can be
separated by filtration
TRUE SOLUTIONS
The size of solute
particles present in
true solution is so
small that it cannot
be seen with naked
eyes, the particles
of true solution do
not settle down
when they are
placed undisturbed ,
the path of light
beam is not visible
through the
solution ,the
particles cannot be
separated by
filtration
