Hydrogen and Points Essays

984 Words May 17th, 2013 4 Pages
1. Identify the functional group or molecule for each of the following. (3 points) 1. COOH -OH 2. COH -OH 3. COH -OH 1. List whether each of the following substances was positive or negative for reducing sugar, as indicated by the Benedict's test. (6 points) 1. corn syrup (1 point) positive 2. table sugar (1 point) positive 3. unknown 1 (1 point) negative 4. unknown 2 (1 point) negative 5. unknown 3 (1 point) positive 6. unknown 4 (1 point) positive 1. List whether each of the following substances was positive or negative for starch, as indicated by using iodine. (7 points) 1. onion juice (1 point) positive 2. water (1 point) negative 3. cornstarch (1 …show more content…
5. While working a part-time at a lab, the student is asked to grab a jar that contains carbohydrates. Two jars are on the counter, each labeled with their chemical formula. One is labeled C5H10O5, and the other is C3H9O3. (6 points) 1. Which one is the carbohydrate? (1 point) C5H10O5 2. What was the student's decision based upon? (4 points) the ratio 1:2:1 3. What type of sugar is it? (1 points) table sugar. 1. Many commercial food products are sweetened with table sugar. What is the chemical composition (technical name) of table sugar? (2 points) 1. How are monosaccharides made from a disaccharide? (2 points) During the digestive process. The disaccharide is broken down. 2. What is this reaction called? (1 points) Digestion. 1. At home, the student is cooking with butter and lard. While the fats sit on the counter, it is noticed that the butter begins to melt, but the lard doesn't. Based on what the student knows about fats, which product most likely contains the most hydrogen atoms? Provide an explanation for this (5 points). Lard. Because lard has more fat, which weighs more, and will most likely contain more hydrogen molecules, causing it to melt at a higher temperature. 2. Name two body structures that are composed of protein. (2 points) bones, hair. 1. (Application) How might the information gained from this lab pertaining to biological molecules be useful to the student, or

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