Showing posts from November, 2018

Activity 9: Flocculation - pH

Activity 8: Flocculation - starch

During this class we performed 5 experiments: Firts of all, at the beginning of the class, the teacher showed us a box where we could see the 5 experiments on the right side and above there were letters (A, B, C, D and E). Once we have the results of the experiments, we have to fill out the boxes inside
A B C D E Sweet lactose glucose starch maltose sacarose Soluble in water No YES YES YES YES Lugol test -+++-Fehling test +-++-


Activity 7 - Lipid extraction - Saponification

Team: Álvaro Ribas & Pau Vilà Date: 8/08/2018
Aim of the studyThe aim of this project is to create a soap from oil, water with NaOH and . We mix it and we can see that the soap is formed trough saponification(is the reaction of the oil and water with NaOH). Materials- Water with NaOH (90ml, 32g) - Oil (279ml) - Beaker(500 ml) - Anise
We add 90mL of water to 32g of NaOH. Then we put it in a beaker and mix it. Whiñe we did it, we could touch the bottom and feel that it was hot because the NaOH is reacting with water within an exothermic reaction.
Once mixed, we added 279mL of oil. To do it, we first added 300mL of oil in a beaker and, with a pipette, we extracted the extra 21mL.
We mixed the oil and the water with NaOH for 20 minutes until the mixture become dense.
We put it in a mold and add a little bit of anise to improve the smell.
The soap was produced.
Soap is a product that serves for personal hygiene and to wash certain objects except in hard water. In hard water only …