Conclusion: The purpose of this lab was to synthesize and purify aspirin. The theoretical yield was calculated to 3.766g. The actual yield of pure aspirin was 2.863g with a yield of 76%. The percent yield indicates that our synthesis was a success but the yield is low and indicates that some of the aspirin was lost during synthesis. Some reasons for loss can result from human error such as loosing product from sticking on the spatula and the Buchner funnel and several weighings. Also‚ when transferring
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Anaerobic Respiration Lab Aim: To identify the products of anaerobic respiration in yeast Apparatus and Materials: boiling tubes‚ delivery tube‚ bungs‚ sugar‚ yeast‚ lime water‚ liquid paraffin‚ Bunsen burner Procedure: Water was first boiled in the boiling tube. A small amount of sugar was then dissolved into the boiled water‚ which was allowed to cool. A little bit of yeast was added then stirred. Apparatus was set up as shown in Figure 4. A layer of liquid paraffin was added to the surface
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Determination of Gold from Goldfish ABSTRACT The abstract is a condensed version of the entire lab report (approximately 250 words). A reader uses the abstract to quickly understand the purpose‚ methods‚ results and significance of your research without reading the entire paper. Abstracts or papers published in scholarly journals are useful to you when you are conducting library research‚ because you can quickly determine whether the research report will be relevant to your topic. The material
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5-13-13 Period 5 I. Title: Titration Lab II. Purpose: To determine the concentration of an acid or a base exactly by neutralizing the acid or base with an acid or base concentration. III. Materials: The materials needed are a burette‚ boat dish‚ soap‚ beaker‚ ring stand‚ clamp‚ funnel‚ phenolphthalein (indicator)‚ scale‚ 250 mL flask‚ distilled water‚ stirrer‚ acid‚ and base. IV. Procedure: This lab was done in two days. On day one the first thing that was done was
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Lab Report: Purpose: The Objective of this lab was to learn how to measure the pH (or acidity) of commonly known fluids‚ using the correct tools and procedures. To then use that data to document the changes noticed when mixing those same fluids and changing their respective pH levels. Materials: In order to conduct this experiment several pieces of equipment and other materials were needed. The first item was a graduated cylinder‚ which was used in order to measure out the precise
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SCIT 1407/BIOL 2401 Tissue Lab Practical 1 I. EPITHELIAL TISSUE: Only exists in three cell shapes – flat or squamous‚ cuboidal & columnar. This tissue covers or lines other tissues or produces tubes. Epithelial tissue always rests on a basement membrane. The characteristics are: lack of visible interstitial space‚ many cells‚ and no blood vessels. A. Simple Squamous: (kidney slide). Look in the outer edge or cortex of the kidney to find a Bowman’s capsule. The lining of the Bowman’s
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01.07 Accuracy and Precision: Balance Lab Worksheet Calculations Show all of your work for each of the following calculations and be careful to follow significant figure rules in each calculation. 1. Part I: Density of Unknown Liquid 1. Calculate the mass of the liquid for each trial. (Subtract the mass of the empty graduated cylinder from the mass of the graduated cylinder with liquid.) Trial 1 36 - 25.5 = 10.5 Trial 2 36.5 - 25.5 = 11 Trial 3 36.9 - 25.5 = 11.4 2. Calculate the
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Ammonia and Hydrochloric Acid Lab Chemistry 1 Abstract The straw should be cut shorter to 8 cm in order to make the solid ring appear in the center of the straw. We achieved our goal‚ cutting the straw caused the gases to not have to go as far‚ and meet in the middle. Background The particles in a gas are very loose and tend to move around a lot very quickly. The particles in a solid are very compact and vibrate but don’t really move very much. The particles in a liquid however are more
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smaller than 0.85mm (Pass through 15 B.S. sieve) and bigger than 0.60mm (Retain at 25 B.S. sieve). A H M 531 Compressive and tensile strength of cement mortar By: Ahmed Essam Mansour The Civil Engineering Center 1 Visit www.AHM531.com for more lab reports and lecture notes! A H M 531 The Civil Engineering Center In the cement-sand mortar‚ the proportion between Cement and Sand is 1:3 and the W\C = 40%. The same mixture is used in the compressive test a nd in the tensile test. Apparatus
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A. What is the name of the pigment that captures light? Chlorophyll B. Why does the pigment appear green? It absorbs other colors of light such as red and blue‚ so in a way the green light is reflected out since the pigment does not absorb it. 2. List two variables besides the wavelength (color) of light which might affect the rate of food production in plants. Light intensity and carbon dioxide 3. Why is chlorophyll important for all biological life? It is necessary for photosynthesis which
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