Saccharides Properties

Introduction: 
Saccharides are organic molecules consisting of C, H and O atoms. Usually the empirical formula is Cn H2n On. Are divided into three groups:

• Monosaccharides
• Oligosaccharides
• Polysaccharides

Material:

-Test Tube rack

-10ml Pipet

-Distilled Water

-5 test tubes

-1 dropper

-5 spatula

-Lactose

-Maltose

-Glucose

-Sucrose

-Starch

-Lugol's iodine

Objectives: 

1. Identify different sugars from it's properties
2. Differentiate mono and disaccharides
3. Understand the relation between structure and some properties

Procedure: 

In the firts part of the experiment we are going to test some physical properties of the saccharides we have in the lab: flavour, crystal structure and colour.
Flavour: Put a small amount of each saccharide in our hand and taste it.
Crystals: Observe a small amount of each saccharide on a clock glass under magnification.
Colour: White, transparent or creamy.

To test solubility

We clean and dry 5 test tubes and label them "G, M, L, SU, S"
We put 5mL of water in each test tube
With the aid of a spatula, we put a small amount of each saccharide inside the labelled test tube and test if they are soluble or insoluble.
Finally, we observe if each saccharide forms a mixture called dissolution or a colloidal suspension.

Lugol's iodine Test

Add 2 drops of Lugol's iodine to each test tube and test if the reaction is positive or negative. The reaction is positive when iodin ereacts by turning from yellow to a purple, dark-blue/black colour.



















(DANIA'S BLOG PICTURE)