the molar masses you calculated in questions 3 and 6. 8. The formula for antifreeze is C2H6O2. Calculate its molarmass using the periodic table. 9. Calculate your percent error. Conclusion: This lab was a phenomenal success! The purpose of determining the freezing points of water‚ 10% antifreeze‚ and 20% antifreeze was not only accomplished‚ but also done so in a splendid manner. The net figures of our experiment were less than 5°C off from the established values. Of course‚ it goes
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Julie Nguyen Equilibrium Lab 4-28-14 I. Purpose To study the affect of temperature & concentration changes on systems in equilibrium II. Safety Wear apron Wear goggles Do not spill chemicals Clean up after use Wash hands Chemicals are TOXIC (by Britney Spears) III. Procedure A. Iron-thiocyanate equilibrium Pipet .3mL of 1 M iron (III) nitrate and .3 mL of 1 M ammonium thiocyanate. into clean 250 mL beaker. Add 75 mL of DS water. Mix well. Divide the solution into equal
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Hematocrit Determination Learning Objectives 1. Understand the terms hematocrit‚ red blood cells‚ hemoglobin‚ buffy coat‚ anemia‚ and polycythemia. 2. Understand how the hematocrit (packed red blood cell volume) is determined. 3. Understand the implications of elevated or decreased hematocrit. 4. Understand the importance of proper disposal of laboratory material that comes into contact with blood. Data |Total height of blood column (mm)|Height of red blood cell layer (mm)|Height of buffy
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When I started to plan my presentation‚ I had a hard time deciding what‚ exactly‚ I was going to say. I had started with the idea that I would just basically go over the main points in my paper in the order I wrote them in. I had a hard time getting anywhere with that idea. Then I did the Exhibition Fair. I realized that one of my more common talks that I did during the fair would be a good order for me to cover things in my presentation. So away went my old order and in came my new idea that
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Sample Lab Report: Factors which Affect the Activity of the Enzyme Catalase Purpose: Must include: background information about concepts involved in the lab‚ statement of purpose of the lab identification of independent and dependent variables. A hypothesis is often not necessary or appropriate. Enzymes are proteins that speed up chemical reactions in cells. They break down molecules called substrates. Each enzyme has only one substrate that it breaks down. Enzymes are produced in
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BIOLOGY- VIRTUAL LAB DAYS P. Aurelia grown alone‚ cells/mL P. Caudatum grown alone‚ cells/mL P. Aurelia grown in mixed culture‚ cells/mL P. Caudatum grown in mixed culture‚ cells/mL DAY 0 1 1 1 1 DAY 2 6 4 4 6 DAY 4 27 14 17 12 DAY 6 42 24 33 10 DAY 8 49 30 39 8 DAY 10 49 30 43 4 DAY 12 49 30 48 2 DAY 14 49 30 48 0 DAY 16 48 30 47 0 Make a hypothesis about how you think the two species of Paramecium will grow alone and how they will grow when they are grown together. When 2 species of paramecium
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Determine the % change in mass over the week and report these in a chart and graph. Be sure your graph has all of the appropriate titles and units. Analysis Questions: 1. For this experiment‚ what were the independent variable and the dependent variable? What was the control? What were some constants in this lab? 2. Calculate the average rate of water loss per day for each of the treatments. (Humidity‚ Light‚ Fan‚ Dark‚ Room or control). 3. Explain why each of the conditions
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the cell. MATERIALS: Potato Forceps Stopwatch Scalpel Test tubes Knife Mass balance Graduated cylinder ruler salt solution test tube rack PROCEDURE: 1. Cut 18 potato cores from the same potato using a knife and place them onto the lab bench. Using a scalpel and ruler (calibrated in millimeters) cut the cores into 50 mm lengths‚ with care taken to ensure no potato peel being left on them. The cutting will be to an accuracy of 1 millimeter 2. Mass each potato core using the mass balance
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Egg Lab Write Up The purpose of this lab was to depicked the many properties of diffusion such as isotonic‚ hypotnonic‚ and hypertonic‚ so that students could have a clear visual example to go by for future refrences. We also did this to learn about selective permeability and osmosis. Our original hypothesis stated that the vinegar would react with the calcium in the shell to create CO2 bubbles. Note I said the original hypothesis as this experiment took coarse over a four day period‚ in which
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breakdown of hydrogen peroxide into water and oxygen. The purpose was to isolate catalase and measure the rate of activity under different conditions. The laboratory was also conducted in association with a second laboratory that measured the effects of an inhibitor on the enzymes. Changes in temperature and pH along with Substrate Concentration and Enzyme Concentration were the conditions tested in the experiment. Each lab was assigned to a group A‚ B‚ C and D in our class performed this experiment
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