Carbohydrate Identification Lab

Carbohydrate Identification Lab Analysis Questions

Use your results from the carbohydrate identification lab and any notes or resources about carbohydrates to answer the following questions:

1. Name the three categories of carbohydrates studied in this investigation.

Monosaccharide, Disaccharide, Polysaccharide

2. What three chemical elements are present in all carbohydrates?

Carbon, Oxygen, Hydrogen

3. Give two examples each of the names of sugar molecules from our discussion or the textbook/online that are:
1. Monosaccharide's

Glucose, Fructose

2. Disaccharides

Lactose, Maltose

3. Polysaccharides

Starch, Glycogen

4. How many times larger is the number of hydrogen atoms than oxygen atoms in:
1. water?

2 times larger

2. carbohydrates?

2 times larger

5. “Mono” means one, “di” means two, and “poly” means many. Why are these terms used in describing the three types of sugars?

In mono, there is only one carbohydrates. In di, there is two carbohydrates. In poly there are many carbohydrates.

6. How can you tell by using Benedict’s and iodine solutions if a sugar is a
1. Monosaccharide?

-It will turn orange

2. Disaccharide?

- It won't change

3. Polysaccharide?

- It won't change

7. A certain sugar has no change in color when tested with Benedict’s solution.
1. Can you tell what type of saccharide it is?

- No you can not tell what type of saccharide it is  

2. Explain.

-Because there are two different types of saccharides that has no change

8. A certain sugar has a color change in Benedict’s solution.
1. Can you tell what type of saccharide it is?

- Polysaccharide

2. Explain.

-Because the chemicals in the iodine can only react with the saccharides when there are a lot of carbohydrates

9. Give a examples of foods that contain
1. Monosaccharides

- Honey, Pears

2. Disaccharides

- Sugar, Yogurt

3. Polysaccharides

-Taco shells, Corn

Procedure 
In this lab we were able to see all the different reactions we could get with different solutions. Those two solutions that we used were Benedict and Iodine. We had test tubes with small amounts of monosaccharide, disaccharide, and polysaccharide; with them we put about seven drops of benedicts in each tube. Then we put them in warm water for five minutes and were able to see the reaction that Benedict did on the solutions. With the iodine, it was different because we didn't have to put it in warm water to get a reaction out of the solutions. Instead we were able to see them shortly after we put the seven drops in each tube.
Reactions

After we were done we noticed we were able to get different reactions and others didn't react at all. In the monosaccharide we had very little reactions with Benedict's and Iodine. 

+	Reacted
-	Didn’t React
- a little	Had a little Reaction

	Benedicts	Iodine
Monosaccharide	-  a little	-  a little
Disaccharide	+	-  a little
Polysaccharide	-  a little	+
Corn Starch		+
Honey maid crackers	-
Honey and Cheerios		+
Sugar Benedicts	-
Dextrose		-