Titration of a Weak Acid Introduction: We will be using the LoggerPro and LabPro in order to help us determine our data. The purpose of this experiment is to follow the changes of pH during the titration of an acid and a base in order to determine the of the weak acid‚ . is a constant for a given acid at a given temperature. In this experiment we determined the Ka using two different methods: 1) the measurement of the pH of a solution containing a known concentration of a weak acid‚ and 2) measurement
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ABSTRACT: This lab allows us to observe the conversion of hydrogen peroxide (H2O2) into water and oxygen gas. An enzyme known as catalase facilitates this decomposition reaction. The catalase enzyme acts as catalysis‚ helping lower the energy needed to activate the reaction while the enzyme itself is not affected. Catalase is a digestive enzyme used to break down hydrogen peroxide‚ which is a normal byproduct of cellular respiration. The reaction could take place without the help of catalase‚ but
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The fermentation is accomplished with a symbiotic combination of different bacteria and yeasts. The main type of bacteria found in the fermentation of milk to Kefir is Lactobacillus. Lactobacilli ferment the lactose found in milk and produces lactic acid‚ contributing to the sour taste‚ characteristic of Kefir. The fermented product‚ Kefir‚ is not know only for its taste‚ but more so for the many health benefits if can have for the body. Experimental Procedures The first step in this experiment
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Abstract: This report presents the reason why the ocean does not freeze in the winter. Since the ocean consists of salt water‚ an experiment was done to test the effect of freezing on salt water compared to pure water. The experiment was conducted three times in order to obtain accurate results and eliminate errors. In addition to the salt and pure water experiment‚ a variation of this experiment was created to test other options. In the variation experiment the effect of freezing on sugar water
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used a variety of data sources and methods to provide a comprehensive analysis of the U.S. fast food market. Through publicly available data‚ we thoroughly document and evaluate the menus and marketing practices of the nation’s largest fast food restaurants. Whenever possible‚ we used the same methods as our 2010 report‚ “Fast Food FACTS: Evaluation of the nutritional quality and marketing of fast food to youth‚”1 to measure changes over time. Our methods include analyzing the nutritional
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Alka-Seltzer Rocket Formal Lab Report Abstract In the Alka-Seltzer Rocket lab one was to experimentally determine how much (grams) Alka-Seltzer and water in mL‚ is needed to launch the rocket the highest/longest distance in cm. Also to experimentally determine the % NaHCO3 in the tablet using the information from the highest/longest distance. Calculate the error and % error of NaHCO3 in an Alka-Seltzer tablet and to determine the limiting reagent for the highest/longest distance traveled. Alka-Seltzer
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TITLE OF EXPERIMENT 2 : DILUTION 2.1: OBJECTIVES Upon completion of this experiment‚ students should be able to: 1. determine the concentration of coloured solution such as FeCl3 by using dilution and colour differentiating (colorimetric) techniques. 2.2: INTRODUCTION Concentration can be expressed in many different ways such as percentage volume and percentage weight etc. In laboratory‚ normally concentrations were expressed as molarity and normality. Molarity is the
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hydrogen groups from the carbons. Concentrated phosphoric acid was used as a catalyst to help move the reaction towards the products motioned above. To determine the successfulness of the experiment and the amount of product(s) recovered‚ IR spectroscopy‚ Gas Chromatography and percent yield calculations were used. Equations and Structures 6. References 1. "18. Dehydration of 2- Methylcyclohexanol." Organic Chemistry Lab 2040L. XU Chemistry‚ n.d. Web. 12 Feb. 2013. 2. "Material
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Theories of Staining Techniques Staining bacteria with different dyes via staining techniques‚ allows in distinguishing the microorganism from its backgrounds. Also‚ helps in studying different internal structures such as vacuoles‚ cell walls and spores in details (Seeley and others 1991). Some staining techniques such as Gram staining‚ endospore stain and capsule stain are some of the theories of stains used in bacteriology today. Also‚ these staining procedures help in determining properties
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Experiment 2: Microscopy & Simple Staining September 30‚ 2013 General microbiology laboratory The invention of the microscope has opened up a whole new dimension in science. By using microscopes scientists were able to discover the existence of microorganisms‚ study the structure of cells‚ and see the smallest parts of plants‚ animals‚ and fungi. Today‚ the microscope is still a commonly used tool to diagnose illness in hospitals and clinics all over the world (1)
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