Lily+CSI

toc =__CSI Milford__=

=Day 1 Report:=

Observations
Paper Chromatography is a test used on ink to separate and identify mixtures that are or can be colored. It is also a method for testing the purity of compounds ad identifying substances. When doing this test, we observed the ink of many different black felt pens. We saw that the ink was not all black as it appeared on paper, but rather it is made of many different colors.

Background Information
different substances which are mixed but are not combined chemically. is uniformly distributed within the major component (the solvent). sheets as the adsorbent stationary phase through which a solution flows in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column.
 * Mixture:** a material system made up of two or more
 * Solution:**a liquid mixture in which the minor component (the solute)
 * Paper Chromatography**: Chromatography that uses paper strips or
 * Fractional Distillation**: separation of a liquid mixture into fractions differing

Inferences or Hypothesis
The marker that has the same result (when tested using paper chromatography) as the random note will mean that it was the pen used to write the note and the teacher that it belonged to will be the thief.

Tests Performed
We did **paper chromatography** tests on the different black felt pens that were collected from teachers. We put a dot of whatever felt pen was being tested 2 inches up on a strip of paper then placed it in 20mL of rubbing alcohol.

Data
Different black markers produced different colored ink when tested with paper chromatography.

Conclusion
After marking each strip of paper with the markers and dipping them in the solution the dye n the strip of paper ran. The dye started out black however they changed color. Some where blue, green and purple.


 * Day 2 Report: **

The graduated cylinder had a mass of 17.6 grams on its own. When 10 mL of water was added the measurement is 26.2 gram which means on its own the liquid weighs 8.7 grams D= M/V --> M= 8.7 V=10 ** D=.87 ** water has a density of 1 so the liquid has less density than water **Density:** The degree of compactness of a substance The liquid had a lower density than the water Density Test - D=M/V mass= 8.7 volume= 10 density= .87 After completing the second lab and finding the density of the liquid we discovered that it has a density lower than 1. Which means the density was lower than water. With a volume of 10mL and a weight of .87 grams the density was .87mL/grams
 * Observations **
 * Background Information **
 * Inferences or Hypothesis **
 * Tests Preformed **
 * Data **
 * Pictures **
 * C **** o **** n **** c **** lusio **** n **
 * Day 3 Report: **

At first there was a very small amount of tiny bubbles the amount of small bubbles increased and got bigger. Soon they were big enough to even the boiling chips resulting in a clicking noise. The glass started to fog, condensation built up on the glass. the substance began to drip from the tube.
 * Observations **

**Boiling Point:** The temperature at which a liquid boils and turns to vapor
 * Background Information **

I believe the substance will be a mixture because there are supposed to be two plateaus and each plateau occurs during a boiling point, only a ,mixture would have two or more boiling points.
 * Inferences or Hypothesis **

We heated the substance to see when it would reach it"s boiling point. First we places a test tube with the substance over an alcohol burner.  Then we put a thermometer in the test tube so we could check on the  temperature ever 30 seconds. We also started a timer so Then we we  saw that the substance had two boiling points which meant that the  mystery substance was a compound, a mixture of two substances with  different boiling points.
 * Tests Preformed **


 * Pictures and Data **

The experiment resulted in two boiling points; one at 79 degrees Celsius and the other at 99 degrees Celsius. The substance is a mixture of two separate substances.
 * Conclusion **


 * Day 4 Report **

When the temperature reached **79** it stayed that temp meaning it was at a boiling point if it is a mixture the temperature will eventually continue to rise to the second boiling point. The liquid collected in test tube A was a cloudy yellow.
 * Observations **

When the temperature was at **99** degrees it stopped rising meaning this was it's second boiling point. The liquid in test tube B was cloudy and white.

When the substance reached **100** degrees, the liquid in test tube C was clear and white.

when it reaches a boiling point a liquid collects in the test tube in the beaker when it boiled large boiled floated to the top a lot of condensation in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column.
 * Background Information **
 * Fractional Distillation**: separation of a liquid mixture into fractions differing

A liquid should form in the test tube that is placed in the beaker. As the substance is boiling and up until it reaches its first boiling point, the evaporation from the substance will go through the tube and then condense and form a liquid once in the test tube. The same process will occur for the second boiling point. Part 1 of Fractional Distillation Test Tube A: collected the least liquid, color, cloudy yellow Test Tube B: collected the most liquid, color, cloudy white/gray Test Tube C: collected the middle amount of liquid, color, clear In conclusion the mystery substance is made up of two other substances witch means it is a compound. One substance has a boiling point of 79 degrees Celsius and the other has a boiling point of 99 degrees Celsius. We can tell that these are their boiling points because these are the places that plateaus occurred.
 * Inferences or Hypothesis **
 * Picture **
 * Test Preformed **
 * Data **
 * Conclusion **


 * Day 5 Report **

Only substance A caught on fire when it caught fire it fanned around outside of the stick you only had to quickly touch the match to the stick for it to catch into a flame. the density's of the liquids were around 2-3
 * Observations **

in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column. I think that the liquid in test tube A will be flammable since it was the liquid that was collected first so the substance it came out of was the fastest to boil. I think that test tube A will also have .the greatest density because it is the most cloudy. Test Tube - 5 mL - Flammable - Weight in the graduated cylinder= 21.8 grams - Weight outside the graduated cylinder= 13.9 grams - Density: 2.78 grams/ mL
 * Background **** Information **
 * Fractional Distillation**: separation of a liquid mixture into fractions differing
 * Inferences and Hypothesis **
 * Pictures **
 * Data **

Test Tube B - 5mL - Note flammable - Weight in the graduated cylinder= 22.3 grams - Weight outside of graduated cylinder= 14.4 grams - Density: 2.88 grams/mL

Test Tube C - 5 mL  - Not flammable - Weight in the graduated cylinder= 22.7 - Weight outside the graduated cylinder= 14.8 grams - Density: 2.96 grams/ mL

- the graduated cylinder weighed 7.9 grams when it was empty

Part 2 of Fractional Distillation- flammability tests
 * Tests Preformed **


 * Who Did It??? **

// Mrs. Cravener // - The ink in the second pen belonging to her matched the ink that was used to write the ransom note almost perfectly. - The other suspect's pens showed few similarities with the pen used for the note - A sheet of paper the same size and color of the one used for writing the ransom note on was found in her room - When asked about the paper she seemed very suspicious