Our project is about Orange Juice.

We have make experiment with this orange juice.

 Our leading question is "Why you have to drink quickly an orange juice?"

Our experiments:

-chromatography of sucars

-dosage of glucose

 -dosage vitamine C

 -recuperation and dosage of ethanol

Our projet

TapWater: Titration with EDTA 

       The goal of this titrationwith EDTA is to detect the presence of ion calcium in tapwater. To prove this presence of this ion you must to put on a becker tapwater with indicator and over this becker you put on the buret a solution of EDTA. EDTA react with the ion calcium and the indicator. With the volume equivalent you can calcul the concentration of ion calcium in the tap water.

      

GONZALEZ Bixente

ESPIL Lucas

CASAMAYOU Hugo

Make a sound with a light

In this experiment we have made a sound with a light.

We capted the light with a photodiode and we transmite it to a speaker.

 this system is like a wireless system

Project : Biofuels

 Extraction of the oil from sunflower's seeds.

Andony Gatinaud Barberteguy, Vincent Mirailh and Thibaut Latapy are going to talk about an experiment of our project. This experiment consists in extract the oil from the sunflower's seeds.
We have mix 30g of sunflower's seeds with 10mL of cyclohexane. The cyclohexane has the role of solvent in order to extract the linoleic acid contained on the seeds. At the end of this experiment, it stays only cyclohexane and linoleic acid.

Additives 

Benzoic acid synthesis

Andoni harambillet 

Cyril Cardon 

Kévin Ursuegui 

We carried out the same experiment as presented beneath this quote, with the tools in the lab.

Thanks for watching !

MEASURING WATER pH

We tested six solutions including :

Sea water, soapy water, hepar, acetic acid, tap water and distilled watter.

We did four experiments.

The first experiment with "cresol red " and our results were:
Sea water we see a yellow precipitate.

Soapy water we see a green precipitate.

Hepar we see a red precipitate.

Acetic acid we see a yellow precipitate.


Tap water we see a yellow precipitate.

Distilled watter we see a green precipitate.

When the precipitate is red the solution is also basic or acid and when the precipitate is yellow the solution is neutral.

After we conduct an experiment with pH meter:

Sea water we see 7.03

Soapy water we see 7.81

Hepar we see 7.82

Acetic acid we see 2.8

Tap water we see 4.53

Distilled watter we see 4.64

We note that the second experiment were more precise than the first experiment.

Accaries Nicolas and Guillemet Yohan