Experiment 4: Qualitative Analysis of Cations and Precipitation Reactions The overall goal of experiment four was to determine the identity of unknown cations presented to the student. But in order to know the identity of these unknowns‚ in part 1‚ Ag+‚ Pb+‚ and Hg22+ were presented to the student in aqueous solutions and then precipitated through experimentation. In part 2‚ the same procedure was enacted to determine which substances precipitated through qualitative analysis. Solubility rules
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Introduction In unit 7.3 the experiment tested the ability of lactase to specifically bind and interact with lactose compared to maltose. In unit 7.4 the experiment tested the role‚ if any‚ that metal ions have on the activity of lactase. My hypothesis for unit 7.3 was knowing that lactase is specific for lactose‚ lactose will separate into galactose and glucose‚ as maltose will not change (153-155). Lactase should like lactose. For unit 7.4 my hypothesis was that EDTA will remove the ions‚ and
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number of your metal sample and record the mass in the table.
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oxygen to do this but not all of them require it. Organic carbon molecules are the energy source‚ and for waste is carbon dioxide (CO2) and water (H2O). CO2 can combine with water to form carbonic acid during cellular respiration. Phenolphthalein can be used to help detect any changes in pH because of production of CO2 during cellular respiration. Phenolphthalein usually appears clear or colorless in acidic solutions‚ and red in basic solutions. Procedures: In the first lab‚ seven test
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EXPERIMENT I Photoreduction of Benzophenone Introduction The study of chemical reactions‚ isomerizations and physical behavior that may occur under the influence of visible and/or ultraviolet light is called Photochemistry. The fundamental principles for understanding photochemical transformations are that light must be absorbed by a compound in order for a photochemical reaction to take place‚ and that for each photon of light absorbed by a chemical system only one molecule is activated for
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process. Craik and Tulving (1975) developed an opposing theory in which they proposed the levels of processing theory‚ stating its not the processing but the type of quality of the processing that is performed‚ that determines the retention. The aims of this study were to empirically replicate and understand Craik and Tulving’s levels of processing theory and how it influences memory. It was hypothesized as the level of processing increases‚ hit (yes responses) proportion will also increase. Also hypothesized
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Physics Lab report Aammar Paracha Section MX Feb 6th 2015 OPTICS Abstract: This experiment revolves around using light rays and lenses. The experiment also discusses different properties of light rays. This experiment uses different lenses and measurements to produce images and observes different techniques to obtain the image position. Question and Answers: 1. Use your data to verify the Law of Reflection and then use Snell’s Law to calculate
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flask with the stopper. 7. Measure and record the total mass of the flask and its contents. 8. Slowly tilt the flask sideways to allow the two solutions to mix. 9. Measure and record the total mass of the flask and all its contents. Part B : Antacid Tablet in water 1. Take a Erlenmeyer flask and fill it half with water. 2. Take an antacid tablet out of its package. 3. Place the tablet and the flask containing water on the balance scale. Record the mass of the flask‚ water‚ and the tablet
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Ed.D. Version 42-0027-00-01 Lab Report Assistant This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions‚ diagrams if needed‚ and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which
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every chemotherapeutic agent varies with their antimicrobial activity. This is needed because every disease is very different. Purpose: The purpose of this experiment is to determine that different chemotherapeutic agents are needed to treat different kinds of diseases. Since there is a wide range of possibilities this experiment is needed to determine which medication is best for certain types of microbial metabolism. This way we can evaluate the antimicrobial’s reaction to different chemotherapeutic
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