Experiment 1: Colligative Properties of Solution
EXPERIMENT 1
COLLIGATIVE PROPERTIES OF SOLUTIONS
Date: December 03, 2013
Locker 21
Members:
Vanessa Olga Dagondon
Christine Anne Jomocan
Janica Mae Laviste Nablo
Ken Menez
A. TYPES OF DISPERSED SYSTEMS
Results and Discussion
The first part of the experiment aims to differentiate the different dispersion systems. In this experment, three systems are introduced: true solution, colloidal dispersion and coarse mixture. The said three systems are classified through a property of colloids known as the tyndall effect or the scattering of light.
In the experiment, three solutions were prepared and they are as follow: fitered NaCl solution, cooked starch solution and uncooked starch solution. All of these solutions were mixed thoroughly. A beam of light
(coming from a flashlight) was then focused in all the solutions. The behavoir of light when directed on the following systems will determine which is which. The observation are summarized in the table below.
Table 1.1
True Solution
(NaCl)
Colloidal Dispersion
(cooked starch)
Coarse
Mixture (uncooked starch)
Appearance
Colorless and clear
Colorless and clear
Cloudy with dusty like particles in sight
Visibility of Particles
Not Visible
Visible
Visible
Effect of a Beam of Light
No effect
Light scattered
Light scattered
Particle Size
< 1nm
1nm to 1mcu
> 1 mcu (1 micron)
The NaCl soloution is true solution. Based on the table, there was was no effect after the beam of light was focused on the solution. The light did not pass, thus it does not possess the property of the tyndall effect. It was also noted that no particles were visible. Just like the NaCl solution, the cooked starch solution is also clear.
However, some particles are visible and the beam passed through it and as observed, the light scattered, thus proving the property of tyndall effect and its existence as a colloidal dispersion. Last, the uncooked starch has the largest particle size and its appearance is cloudy. The light also scattered
COLLIGATIVE PROPERTIES OF SOLUTIONS
Date: December 03, 2013
Locker 21
Members:
Vanessa Olga Dagondon
Christine Anne Jomocan
Janica Mae Laviste Nablo
Ken Menez
A. TYPES OF DISPERSED SYSTEMS
Results and Discussion
The first part of the experiment aims to differentiate the different dispersion systems. In this experment, three systems are introduced: true solution, colloidal dispersion and coarse mixture. The said three systems are classified through a property of colloids known as the tyndall effect or the scattering of light.
In the experiment, three solutions were prepared and they are as follow: fitered NaCl solution, cooked starch solution and uncooked starch solution. All of these solutions were mixed thoroughly. A beam of light
(coming from a flashlight) was then focused in all the solutions. The behavoir of light when directed on the following systems will determine which is which. The observation are summarized in the table below.
Table 1.1
True Solution
(NaCl)
Colloidal Dispersion
(cooked starch)
Coarse
Mixture (uncooked starch)
Appearance
Colorless and clear
Colorless and clear
Cloudy with dusty like particles in sight
Visibility of Particles
Not Visible
Visible
Visible
Effect of a Beam of Light
No effect
Light scattered
Light scattered
Particle Size
< 1nm
1nm to 1mcu
> 1 mcu (1 micron)
The NaCl soloution is true solution. Based on the table, there was was no effect after the beam of light was focused on the solution. The light did not pass, thus it does not possess the property of the tyndall effect. It was also noted that no particles were visible. Just like the NaCl solution, the cooked starch solution is also clear.
However, some particles are visible and the beam passed through it and as observed, the light scattered, thus proving the property of tyndall effect and its existence as a colloidal dispersion. Last, the uncooked starch has the largest particle size and its appearance is cloudy. The light also scattered