Student Exploration: Dehydration Synthesi

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1. If you exercise on a hot day, you need to worry about dehydration. In this context, what do you think dehydration means? 2. Astronauts and backpackers often bring dehydrated food. What do you thi... nk dehydrated food is? Gizmo Warm-up What do rice, potatoes, and sugar have in common? They are all foods rich in carbohydrates. Carbohydrates are an important energy source for your body. The basic building block of most carbohydrate compounds is the molecule glucose. Using the Dehydration Synthesis Gizmo™, you will learn about the structure of a glucose molecule and how glucose molecules can be joined together to make larger carbohydrate molecules. 1. Look at the chemical formula for glucose. How many carbon (C), hydrogen (H), and oxygen (O) atoms are found in a molecule of glucose? C: 2. Turn on Show chemical structure. Each black sphere represents a carbon, hydrogen, or oxygen atom. The lines connecting the spheres represent chemical bonds. A. How many black spheres are in the diagram? How does this relate to the number of carbon, hydrogen, and oxygen atoms in the chemical formula for glucose? B. Activity A: Build a glucose molecule Get the Gizmo ready: • Introduction: Goal: Construct a molecule of glucose. 1. Identify: A. What is the valence of oxygen? B. What is the valence of hydrogen? 2. Build a model: Use the carbon, oxygen, and hydrogen atoms from the Atoms box 3. Make a diagram: Congratulations, you have completed a molecule of glucose 4. Explain: H [Show More]

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