covering it with a cover glass using no stain. It is best viewed with as little illumination as possible and must be done quickly because of drying. Due to the limited stability of Trichomonas‚ the wet mount is not a suggested test choice in an outpatient location where transportation of the specimen to the lab is involved Exercise 2: Simple stains Define acidic and basic dyes. What is the purpose of each? Acidic dye also recognized as a negative stain‚ is defined as a negatively charged dye
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Observations: Before performing the experiment‚ the following remarks were recorded: The mass of the candle was 59.2 grams. The measurement of the visible wick is 0.5 cm. The length of the candle is 16‚5 cm. The candle was pink in color. The circumference of the candle was 7.5 cm. The candle’s width was 2 cm. The state of the candle was solid. The candle was already used and burned. The base’s circumference was 8 cm. The candle is buoyant in water‚ The candle’s volume is 66 ml. The density of the
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D_____ J_____ CARBOHYDRATES LAB May 22‚ 2013 Pre-lab Questions 1. The water in test tube No. 1 is a negative control. No reaction is expected to occur because water is not a carbohydrate. Reaction by a negative control is evidence of contamination. 2. The color changes expected for positive test results are Benedict’s test: orange to brick red Tollen’s test: metallic silver Starch iodine test: blue-black 3. Identify each of the samples in Part 1 as monosaccharide
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Back Laboratory Program SAFETY IN THE CHEMISTRY LABORATORY 786 Pre-Lab Extraction and Filtration 790 1-1 Mixture Separation 792 1-2 Water Purification 794 3-1 Conservation of Mass 798 4-1 Flame Tests 801 Pre-Lab Gravimetric Analysis 828 13-1 Separation of Pen Inks by Paper Chromatography 830 13-2 Colorimetry and Molarity 834 14-1 Testing Water 838 804 7-1 Separation of Salts by Fractional Crystallization 806 7-2 Naming Ionic
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Significant Figures Lab Question 1: Which measurement gives the BEST value for the mass of a single paper clip? (BEST value includes both accuracy and precision) Claim: The measurement accepted as having the best value for the mass of a single paper clip was .411493 grams (Where best accounts for both accuracy and precision). This value was achieved by taking the average weight of a total of 30 paper clips‚ all of presumably varying weights. Evidence/Reasoning: The “best” value that maintains precision
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Lab: Caloric Content of Food Purpose: How many calories are in a peanut? How does it compare to other nuts? Materials: 250 ml beaker‚ ring stand‚ paper clip‚ balance‚ graduated cylinder‚ thermometer‚ aluminum foil‚ peanut‚ 2 other types of nuts‚ lighter. Background information: We measure the energy that foods give us in terms of Calories. A Calorie is the amount of energy required to raise 1000 grams (1 kg) of water one degree Celsius. Our bodies burn up calories through growth and
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Separation Lab Purpose: This lab was based on the separation of the components of a mixture. A mixture can be defined as a physical combination of two or more pure substances. Separation techniques are used to separate components that are not chemically combined. All of these techniques involve changes in the physical state of a chemical compound rather than chemical changes. Sea sand‚ table salt‚ and two other unknown substances will be separated using the separation techniques in order to demonstrate
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Introduction: The purpose of this lab is to use staining techniques and biochemical testing to identify an unknown bacteria using Bergey’s manual. Bergey’s manual of Systematic Bacteriology is a dichotomous key primarily used to identify a bacterial species. Biochemical tests are used to differentiate different species of bacteria. These tests are effective in determining the characteristics of the microbe being tested. Such characteristics include citrate utilization‚ gelatin hydrolysis‚ nitrate
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HOW TO WRITE AN UNKNOWN LAB REPORT IN MICROBIOLOGY GENERAL Unknown reports in microbiology are written in scientific format. Scientific writing is written differently from other types of writing. The results of the exercise or experiment are what are being showcased‚ not the writing. The purpose of scientific writing is not to entertain‚ but to inform. The writing should be simple and easy to understand. There is a specific style that must be followed when writing scientific reports.
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Lab for Chemistry 221 Lab: How much sugar is in a Can of Coke? Abstract: A 50mL (we used 100mL) volumetric flask was used to determine the amount of sugar in a can of Coke per mL in 5 different solutions. Using the calibration curve we determine the amount of sugar per mL in a can of coke. This experiment concluded that there is 43.83g of sugar in a 12oz can of Coke. Introduction: This experiment was conducted to determine the amount of sugar in a can of Coke and to and use a calibration
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