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UMUC Biology 102/103 Lab 2: The Chemistry of Life..............




Question;Lab 2: The Chemistry of LifeINSTRUCTIONS:On your own and without assistance, complete this Lab 2 Answer Formelectronically and submit it via the Assignments Folder by the date listed on yourCourse Schedule (under Syllabus).To conduct your laboratory exercises, use the Laboratory Manual that isavailable in the WebTycho classroom (Reserved Reading or provided by your instructor)or at the eScience Labs Student Portal. Laboratory exercises on your CD may not beupdated.Save your Lab2AnswerForm in the following format: LastName_Lab2 (e.g.,Smith_Lab2).You should submit your document in a Word (.doc or.docx) or Rich Text Format(.rtf) for best compatibility.Experiment 1: What Household Substances are Acidic or Basic?Table 1: pH values of common household substancesSubstancepH GuesspH PaperVinegarSodium bicarbonate solutionQuestions1. Compare and contrast acids and bases in terms of their H+ ion and OH- ionconcentrations.2. Name two acids and two bases you often use.Experiment 2: The Effect of Surface Area and VolumeTable 2: Results from surface area to volume experimentCubeDimensionsSurface Area(cm2)Volume (cm3)Surface Area:VolumeTime Require forComplete ColorChangeDistance of Diffusion1 cm x 1 cm x 1cm1 cm x 2 cm x 2cm1 cm x 1 cm x 6cmQuestions1. How did the surface area affect the diffusion of the cube? What about the volume?What about the surface area to volume ratio? Which of these had the greatest effect onthe diffusion into the cube?2. How does this experiment demonstrate the need for larger cells to divide?3. For the three cubes shown below, determine their surface area, volume and surfacearea to volume ratio. Then, circle the one you believe would be the most efficient andwrite a summary stating why.1.5 cm x 1.5 cm x 1.5 cm0.5 cm x 0.5 cm x 6.0cm3.0 cm x 2.0 cm x 2.0cm


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