Luke+CSI

toc =__CSI Milford__=

=Day 1 Report:=

Observations
Mrs. Laguna had a black pen in her jacket pocket She acted very nervous when i pointed it out to her Mr. Lancos had a black pen as well in his pocket Mrs. Rhodes had a pen but claimed she saw nothing Mr. Beil is part of the anti-penguin league They all had black markers so all the teachers are suspects Mrs. Cravener is the least likely since she had no idea what was going on

Suspects- Laguna, Lancos, Beil, Rhodes, Cravener, Hood, Kirschmen

Background Information
[|Research Info about chromatography] If we use chromatography we can tell which marker belonged to the culprit Mixture- a combination of two or more substances that are not chemically combined Solution- a mixture that appears to be a single substance but is composed of particles of two or more substances that are distributed evenly among each other Fractional distillation- separation of a liquid mixture into fractions differing in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column. paper chromatography- paper chromatography is one method for testing the purity of compounds and identifying substances [|This is a pic of one suspect]

Inferences or Hypothesis
Mrs. Laguna was the most suspicious, and everything that she did that morning was perfect for her to fake a theft. I think she is mad that people like Mr. Hood are haters towards penguins

Tests Performed
We collected pens from teachers

Data
Evidence from Mr. Beils and Mr. Hoods, Mrs. Cravener was a bit clueless

Conclusions
I don't think Cravener is a major suspect, but Mr. Beil and Mr. Hood most likely are the culprits

=Day 2 Report:=

Observations
did the chromatography test to see which pen matched the note which would lead us closer to the culprit

Background Information
same as day one Background info **Inferences or Hypothesis** I think Mr. Hood is probably the one that wrote the note

Tests Performed
Chromatography test- we got each pen from each teacher during the investigation and put the ink from each pen on each piece of chromatography paper. The we labeled each paper with the corresponding teacher and our table and period. Then we put the pieces of paper in the 20 mL of rubbing alcohol

Data
Results for paper in rubbing alcohol: Laguna- mostly a black smudge Lancos- Nothing in center but blue around the outside Beil- Mostly Blue Rhodes- More blue than there is red Cravener- red on bottom blue higher up Hood- Black and blue Kirschmen- Nothing

Conclusions
I don't know for sure, but i think i am sticking with Mr. Hood, the only thing that bothers me is that it is a bit to obvious

=Day 3 Report:=

Observations
We finally found the penguin but the culprit remains to be unknown. The penguin is very ill and hasn't moved since we found him. though a clue also came with the penguin, a mystery liquid. Mass of empty graduated cylinder was 17.6 grams Mass of graduated cylinder + mystery liquid was 26.3 grams Liquid is 8.7 grams in mass Density of liquid is 0.87 g/mL

Background Information
We do not know what the liquid is Density is a characteristic property which means that if we find the density of the mystery liquid, we can figure out what it actually is. **Inferences or Hypothesis** i think the liquid is ethanol because it matched with the density of ethanol according to the density paper

Tests Performed
density test of the mystery liquid

Data
Mass- 8.7 grams Volume- 10 mL Density- .87 g/mL

Conclusions
We looked up the densities of certain liquids on a table and the density closest to the one we measured was ethanol. it is possible that ethanol is the mystery liquid =Day 4 Report:=

Observations
We found a note in Mrs. Cravener's room that had nothing to do with what we were doing but the paper was the same as the ransom note paper and it was the same size. The ink is identical when we put it through the chromatography test but there is different hand writing on the notes. Mrs. Cravener's pen fit with the ransom note when both things were tested in the chromatography test. We also thought Mr. Hovan had something to do with it because he had a similar note, turns out the paper he had was whiter and thinner. =Background Information= Ms. Cravener has acted clueless throughout the entire operation maybe to cover herself up **Inferences or Hypothesis** I don't think that it was Mrs. Cravener or at least not her alone, there was different handwriting which leads me to believe that she is not the only one

Tests Performed
we also did the heating curve review

Data
A- First rise and plateau, the plateau is at around 79 degrees B-after a while, the temperature will start to rise from plateau C- after the rise the temperature will stop at around 99 degrees

Conclusions
I wish that i could have done the heating curve test today but i had to catch up so that did not become a reality. I do not think that it was just Mrs. Cravener, i think it was a group effort. Who all is part of the group remains to be unseen. =Day 5 Report:=

Observations
i can see the mystery liquid vaporizing and traveling into the test tubes and condensing =Background Information= when a substance boils at a liquid state it turns into a gas A gas can turn back into a liquid by condensing, condensing occurs in a gas when energy is removed **Inferences or Hypothesis** there are three different substances in the mystery solution

Tests Performed
Actual heating curve test measuring mass of substances

Data
Mass of graduated cylinder- 17.4 g Mass of graduated cylinder with substance A- 22.6 g Mass of graduated cylinder with substance B- 23.2 g Mass of graduated cylinder with substance C- 21.45 g Mass of substance A- 5.2 g Mass of substance B- 5.8 g Mass of substance C- 4.05 g Volume of substance A- 6.8 mL Volume of substance B- 6.9 mL Volume of substance C- 4.95 mL Density of substance A- 0.76 g/mL Density of substance B- 0.84 g/mL Density of substance C- 0.81 g/mL **Pictures**

Conclusions
Mrs.Cravener is most likely to be the main culprit but i think that she had help from someone else. What the three substances from the solutions has not been found yet.