Example of an A Report

Topics: Water, Chemistry, Fahrenheit Pages: 50 (1315 words) Published: November 15, 2014
Experiment
 1:
 Colligative
 Properties
 &
 Osmotic
 Pressure
 

 

Name:
 
 Ima
 Student
 
Lab
 Partners:
 
 None
 
 
Date
 of
 Experiment:
 
 June
 4th
 –
 6th
 2011
 
Location:
 
 My
 apartment
 
Course
 Number:
 
 CHE112
 

 

 

 


 
Abstract:
 
In
 this
 experiment,
 the
 objective
 was
 to
 observe
 the
 effects
 of
 some
 of
 the
 colligative
 
properties
 of
 solutions.
 
 
 The
 freezing
 points
 of
 distilled
 water
 and
 saltwater
 were
 measured,
 and
 found
 
to
 both
 be
 about
 0
 °C.
 
 The
 osmotic
 effects
 of
 different
 solutions
 on
 a
 dialysis
 bag
 and
 an
 egg
 membrane
 
were
 observed
 and
 it
 was
 possible
 to
 distinguish
 between
 hypertonic
 and
 hypotonic
 solutions.
 
Experiment
 and
 Observation:
  The
 first
 step
 in
 this
 experiment
 was
 to
 make
 an
 ice
 water
 bath.
 
 
 This
 
ice
 water
 bath
 was
 used
 to
 find
 the
 freezing
 point
 of
 pure
 distilled
 water.
 
 A
 test
 tube
 of
 the
 distilled
 
water
 was
 placed
 in
 the
 water
 bath
 and
 the
 temperature
 was
 recorded
 every
 30
 seconds
 until
 it
 
remained
 consistent
 for
 five
 consecutive
 readings.
 
 The
 pure
 water
 test
 tube
 was
 removed
 and
 a
 test
 
tube
 of
 a
 distilled
 water
 and
 salt
 solution
 was
 placed
 in
 the
 ice
 water
 bath.
 
 Again
 the
 temperature
 of
 
the
 water
 and
 salt
 solution
 were
 recorded
 for
 five
 consecutive
 readings.
 
 Data
 tables
 were
 used
 to
 
create
 graphs
 and
 find
 the
 freezing
 points
 of
 the
 pure
 water
 and
 of
 the
 saltwater
 solution.
 
The
 osmotic
 pressure
 portion
 of
 this
 experiment
 began
 with
 soaking
 the
 dialysis
 bag
 in
 distilled
 water
 
for
 30
 minutes.
 
 While
 this
 was
 soaking
 the
 raw
 egg
 was
 placed
 in
 a
 jar
 and
 vinegar
 was
 poured
 over
 it
 
until
 it
 was
 covered
 in
 vinegar.
 
 
 Initial
 observations
 of
 the
 egg
 covered
 in
 vinegar
 were
 made,
 and
 it
 was
 
set
 aside.
 
 The
 dialysis
 bag
 was
 removed
 from
 the
 distilled
 water.
 
 
 One
 end
 of
 the
 bag
 was
 closed
 with
 a
 
rubber
 band
 and
 filled
 1/3
 full
 with
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