Starch

Starch as well as sugars are produced in plants. Starch is found in many foodstuffssuch as:

Bread, potatoes, rice, pasta and maize

Starch and sugars belong to the same familyof chemicals: carbohydrates

Starch Properties

Properties Starch

Appearance

Taste

Solubility

pH

Conduction

Benedict’s solution test

Testing with Iodine Solution

Iodine solution can be used to test for

starch. The positive test is when the iodine

changes from orange to blue/black in the

presence of starch.

Carry out the following experiment:

• Put a little of each solid (starch, glucose, salt, sucrose) into separate dimples on the tile.

• Add 2 drops of iodine solution to each solid

• Record your results in a table.

Sugar Result with Iodine Solution

Starch

Glucose

Salt

Sucrose