Investigating Immiscible Fluids: Layers Formation and Interface Motion

 
1
 
 
2. Liquid layers
 
Opponent:
Team Romania - Limitless
 
Reporter:
Team New Zealand
 
 
2
 
Task of the problem
 
Water and vegetable oil 
do not mix
 and form two 
layers in a beaker
. It is possible to fill the beaker 
with many
more layers of immiscible fluids
. How many layers can you obtain? Investigate
 the motion of the interfaces if
the beaker is disturbed or shaken
.​
 
Immiscible fluids, Polar and Non polar molecules
-
Theoretical information
Numerous layers and Interpretation of movement
-
Experimental
-
Relevant parameters
 
O
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t
l
i
n
e
 
o
f
 
t
h
e
 
r
e
p
o
r
t
e
r
 
3
 
Well done
 
Good
 
Needs
improvement
 
Chemical explanation of the
immiscible fluids
Relation between the polar and
nonpolar molecules
 
Theoretical part
 
Strong points
 
Weak points
 
 
Did not specify polarity is a spectrum
The dipole moment explanation is missing
Theoretical model is missing (how many
layers can we create theoretically?)
The hydrogen bonding theory is not
present
No mention of amphiphilic solutions
Didn’t specify that the short non polar
molecules dissolve in the polar ones
Unclear structure (hypothesis,
conclusions)
 
4
 
4
 
Experimental part
 
Strong points
 
Experimental setup is well
detailed.
Variety of substances used.
Well presented the substance
properties.
 
Weak points
 
Substances from the table are not well
specified and do not work for this
experiment (wrong data about ethanol)
Possible errors in mixing
The motion is not investigated
sufficiently, difference between shaking
and disturbance
The preparation of the apparatus is
missing
The motion of the beaker is
uncontrolled
 
 
 
5
 
5
undefined
 
Discussion
topics
 
Dipole moment
No theoretical model of the
maximum number of layers
The motion of the beaker is
uncontrolled
Difference between shaking
and disturbance
How were the substances
insert into the beaker?
Environmental conditions of
the experiment
 Number of repetitions for
clear results
 
 
6
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The report explores the formation of layers in a beaker containing immiscible fluids such as water and vegetable oil. It delves into the theoretical and experimental aspects, discussing the chemical properties, layer creation limits, interface motion upon disturbance, and the strengths and weaknesses of the study. Theoretical models, preparation errors, substance properties, and experimental controls are highlighted.


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  1. 2. Liquid layers Opponent: Team Romania - Limitless Reporter: Team New Zealand 1

  2. Task of the problem Water and vegetable oil do not mix and form two layers in a beaker. It is possible to fill the beaker with many more layers of immiscible fluids. How many layers can you obtain? Investigate the motion of the interfaces if the beaker is disturbed or shaken. Immiscible fluids, Polar and Non polar molecules - Theoretical information Numerous layers and Interpretation of movement - - Experimental Relevant parameters 2

  3. Outline of the reporter Well done Introduction Good Needs improvement Theoretical explanation Setup Experiments Comparison Conclusions 3

  4. Theoretical part Strong points Weak points Chemical explanation of the immiscible fluids Relation between the polar and nonpolar molecules Did not specify polarity is a spectrum The dipole moment explanation is missing Theoretical model is missing (how many layers can we create theoretically?) The hydrogen bonding theory is not present No mention of amphiphilic solutions Didn t specify that the short non polar molecules dissolve in the polar ones Unclear structure (hypothesis, conclusions) 4 4

  5. Experimental part Strong points Weak points Substances from the table are not well specified and do not work for this experiment (wrong data about ethanol) Possible errors in mixing The motion is not investigated sufficiently, difference between shaking and disturbance The preparation of the apparatus is missing The motion of the beaker is uncontrolled Experimental setup is well detailed. Variety of substances used. Well presented the substance properties. 5 5

  6. Dipole moment No theoretical model of the maximum number of layers The motion of the beaker is uncontrolled Difference between shaking and disturbance How were the substances insert into the beaker? Environmental conditions of the experiment Number of repetitions for clear results Discussion topics 6

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