Lab 12: Dissolved Oxygen and Aquatic Primary Productivity

Designed in cooperation with AP Biology, these experiments facilitate implementation of AP objectives for all 12 required labs. Prepare your students for success on the AP exam with practical laboratory experiments that illustrate key AP Biology concepts. The materials in our AP Lab Kits are easy for students to use, and reliable for delivering accurate results. Kit materials accommodate 40 students or 10 lab groups. Refill kits are also available for each kit with enough supplies for 10 lab groups.

Each AP Biology Kit contains:
• Ready to use reagents and consumables
• Instructions with background information and step by step protocols
• Study questions, expected results, and answers on reproducible sheets
• MSDS sheets and safety precautions

*AP and the Advanced Placement Program are registered trademarks of the College Entrance Examination Board, which was not invovled in the production of and does not endorse these products.

Dissolved oxygen concentration in water samples is measured utilizing the Winkler technique. Students also analyze and determine its relationship to the primary productivity of an ecosystem. For 10 lab groups. Duration: 2 hours or two lab periods.

Kit contents:
• Sodium iodide
• Sodium thiosulfate
• Sodium hydroxide
• Nitrogen enrichment concentrate
• Manganese sulfate
• Phosphorous enrichment reagents
• Starch solution

Required, but not included: pond water, grow lights, sealable containers or BOD bottles (50), screens, burettes, general glassware, linear graph paper, filter paper, foil, pipets, eyedroppers, sulfuric acid, and personal safety equipment.