Zack+CSI

toc =__CSI Milford__=

=Day 1 Report:=

Observations

 * No separation from Kirshman pen
 * dot smears went up 3-3.5 cm from the dot placement

Background Information
Paper Chromatography- technique for separating and identifying mixtures that are or can be colored

Inferences or Hypothesis
Our group believes that the culprit is either Mr. Hood and Mr. Beil.

Tests Performed
paper chromatography test

Conclusions
Mrs. Kircshman can be ruled out as a suspect, as her pen did not smear at all like the note did =Day 2 Report:=

Observations
clear liquid smells like rubbing alcohol note many colors when passed through paper Chromatography

Background Information
penguin was found DEAD :( Mystery liquid found by penguin's mouth cause of death: possibly ingestion of the mystery liquid

Hypothesis or Inferences
mystery liquid may be rubbing alcohol?

Tests Performed
Density Test

Data
graduated cylinder alone: 17.5 grams With mystery liquid: 27 grams mystery liquid: 9.5 grams density: 0.95 g/ml

Conclusions
=Day 3 Report:=

Observations:
__Heating curve:__ 0.5-1.5 min.- still and clear 2 min.- bubbles appear 2.5 min.- boiling begins 3-3.5 min.- rapid temperature spike (increase) 4-4.5 min.- temperature starts to settle out 5-5.5 min- temperature starting to increase 6 min- liquid is murky yellow color 6.5-11.5 min- liquid is still boiling 10.5-13 min- temperature has plateaued at 99 degrees Celsius 12-13 min- liquid in first test tube is diminishing and the liquid in the test tube in the ice water beaker is increasing __Paper Chromatography:__ pen and notes match perfectly; hmmm...

Background information:
__heating curve test-__ by observing the boiling point of the mystery liquid, we can note the boiling temperature of the liquid and then compare it to other known liquids for a similar boiling point new pen and note found in Mrs. Cravener's room

Tests performed:
Heating curve Paper Chromatography

Conclusions:
=Day 4 Report:=
 * the liquid is a mixture
 * there are two different boiling points of 78 and 99 degrees C

Observations:

 * first faction looks yellowish
 * first level out: 78 degrees centigrade
 * second faction, murkier, lighter yellow color than first faction
 * second level out: 99 degrees centigrade
 * all liquids become clear again after being cooled

Background Information:
__Fractional Distillation:__ test that is used to separate mixtures into fractions by using boiling points there are two different liquids in this mixture

Tests Performed:
Fractional Distillation part 1

Conclusions:
=Day 5 Report:=

Background Information:
__Fractional Distillation:__ test that is used to separate mixtures into fractions by using boiling points

Tests Performed:
Fractional Distillation part 2

Data:
fraction a: flammable, 0.7 g/ml fraction b: not flammable, 0.8 g/ml fraction c: not flammable, 0.9 g/ml mean of fractions: 0.8 g/ml

Conclusions:
fraction a: ethanol fraction c: water =Who Did it:= I blame Lisa Cravener of first degree murder for the murder of Rupert the penguin.The ransom note clearly says that the kidnapper wanted Mrs. Catherine Laguna's roll of tickets. Mrs. Cravener loved to win and when her students were questioned, they said that she often yelled at and threatened bade grades if she lost a contest. So if she had the entire roll of tickets, she could never lose. When questioned by investigator Mr. Zack "my dad yelled at me for taking three hours to write up this creative story" Chan, Mrs. Cravener said "I wish I had taken the penguin." This was said in a desperate attempt to blame somebody else on taking the peguin to make herself look innocent. Seemed very suspicious to Mr. Chan when spent many hours analyzing this case. However a breakthrough was made when another note and pen was found in Mrs. Cravener's room. The paper was similar to the paper of the ransom note and the pens matched. So now that a killer was found, a form of death to the victim is needed. At the scene, a beaker of a clear liquid was found. Upon smell, it had a peculiar odor, like a wet dig smell, but there was some strong chemical in there. Upon guess, the cause of death was ingestion and two possible chemicals that could have killed the bird are chloroform or ethanol, both are very potent to a bird's sensitive respiratory system. After a fractional distillation test to separate the solution, the chemical that killed Rupert was ethanol, diluted with water. This was mixed by Mrs. Cravener and nobody could suspected her of this crime because of the watered-down chemicals.