Testing for simple sugers

Testing for Simple Sugars  (Benedict's Test)


Aim


I want to find out how to test for simple sugars.


Simple sugars are carbohydrates that are quickly absorbed by the body to produce energy. They are also classified as “simple” because they contain only one or two units of sugar or saccharides. Also referred to as simple carbohydrates, these sugars are found naturally in a variety of foods that we consume daily.




Equipment
Safety glasses
Bunsen burner
Test tubes
Test tube tongs
Benedict's Solution
Food sample
Method


Place about 2mL of the food sample into a test tube and then add 5 drops of Benedict's solution and 5ml of water
Gently heat the test tube over a blue flame.  DO NOT BOIL!


Results


A positive test for a simple sugar results in the Benedict's Solution changing from a blue colour to a yellow colour to an orange/red colour.


Conclusion


…..








Extra for experts


Two different types of sugar exist: simple and complex. Complex sugar takes longer for your body to break down and is healthier for your body. This type is found in natural carbohydrates such as whole grains and fruit. On the other hand, simple sugar is broken down by your body quickly and causes energy ups and downs. This type of sugar includes refined and processed sugar found in table sugar and added to many sweets. Consuming an excess of simple sugar comes with numerous health problems


www.livestrong.com


Give two examples of simple sugars and complex sugars in your daily food.
At what times of the day may you need simple sugars?
Do you think that it would be wise to eat simple sugars before bed? Why/why not?

Blobs in a Bottle         

Resources:

• A clean 1 litre clear soft drink bottle

• 3/4 cup of water                   

w• Vegetable oil

• Antacid tablets (such as Quick-Eze or Mylanta)

• Food colouring

Procedure:

1. Pour the water into the bottle.
2. Use a measuring cup to slowly pour the vegetable oil into the bottle until it’s almost full. You may have to wait a few minutes for the oil and water to separate.
3. Add 10 drops of food colouring to the bottle; the drops will pass through the oil and then mix with the water below.
4. Break an antacid tablet in half and drop it into the bottle. Watch it sink to the bottom and watch the lava start to flow.
5. To keep the effect going, just add another piece of antacid tablet.

Big questions:

1. Does the temperature of the water affect the reaction?
2. Does the effect still work if the cap is put on the bottle?
3. Does the size of the tablet pieces affect the number of blobs created?
4. What is an oil spill and how do they happen?
5. How do ice and water interact during an oil spill?
6. How does oil affect marine life during an oil spill?

Scientific Explanation (How it works):

To begin, the oil stays above the water because the oil is lighter than the water or, more specifically, less dense than water. The oil and water do not mix because of something called “intermolecular polarity.” Molecular polarity basically means that water molecules are attracted to other water molecules. They get along fine, and can loosely bond together (drops.) This is similar to magnets that are attracted to each other. Oil molecules are attracted to other oil molecules. When you added the tablet piece, it sank to the bottom and started dissolving and creating a gas. As the gas bubbles rose, they took some of the coloured water with them. When the blob of water reached the top, the gas escaped and down went the water         

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