Benzoic acid

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    Exp D. Post Lab Report

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    concentrated sulfuric acid in the first step? The purpose of using concentrated sulfuric acid is to activate the reaction of salicylic acid and acetic anhydride and produce the acetylsalicylic acid, which is aspirin. The sulfuric acid is used to protonate oxygen atom of a carbonyl group of salicylic acid. 2. What would happen if the sulfuric acid were left out? Removal of catalytic acid from the reaction would slow down or not proceed at all because the phenol group on salicylic acid is not…

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    Introduction This accuracy lab of titration report experiment will discuss how to find the unknown substance molarity. By using some of the lab equipment to help guide and identify the molarity of the unknown substance. I believe that it will take around three hundred drops of sodium hydroxide (NaOH) for it to be able to reach to its endpoint of the unknown substance. My reason behind my hypothesis is… Methods In this lab experiment we use a buret to…

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    Lab 4.3 Lab

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    REFLECTIONS FOR LAB 4- FRICTION Lab 4.1 to 4.3 is about all the different frictions. We did 3 different labs. 4.1 was pulling a block across different surfaces and finding the difference in friction. 4.2 was about pulling multiple blocks across different surfaces and finding the difference in friction. 4.3 was about pulling blocks but in a bigger surfaces area. In Lab 4.1 we had to pull different blocks across different surfaces. The surfaces were a tabletop, wax paper, paper towel, fine…

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    Unknown Compounds

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    When hydrochloric acid was added to the unknown and known solutions, both resulted in no reaction. This also occurred when potassium hydroxide was added to both of the solutions. Barium chloride was then added to the two solutions, which resulted in a cloudy white precipitate…

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    To find a stoichiometric point using a functional graphical method. • To discern the molar concentration of a specific weak acid solution. • To compute the molar mass of a specific weak acid utilized within the experiment. • To calculate the pKa of a weak concentrated acid within the experiment. Procedure 1. Molar Concentration of a Weak Acid Solution • Obtain an unknown acid solution (90 mL) and three 250 mL beakers. Make sure the beakers are clean. • Acquire 0.1 M of NaOH solution for this…

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    Purpose To determine the specific types of pigments found in a rose leaf and rose petal by using isopropyl alcohol (C3H8O) in paper chromatography. Scientific Explanation When leaves are mixed with isopropyl alcohol (C3H8O) the alcohol draws out the leaf pigments and chemically change to a solvent. When the solvent is painted on the paper towel nothing happens but when a bit of alcohol is added it easily climbs up the paper towel. This happens because the alcohol molecules are “sticky” and…

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    50m Lactose Synthesis Lab

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    As a result, lactose is a competitive inhibitor. In the presence of the inhibitor, the slope of the Lineweaver-Burk plot becomes the equation below. Using equation 7 along with the Km and the Vmax from series A, the Ki of Series B and C were calculated. The concentration of inhibitor for 50mM lactose was found to be 35714 μM using equation 1. Similar to the substrate concentration, the inhibitor concentration can be found using the same equation, but substituting in the inhibitor molar…

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    Test Tuffe Lab Report

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    Conclusion Throughout all the test tubes that were observed, it is simple to classify samples as mixtures, compounds, or elements by viewing the particles that make it up on a picture representation. It is not as uncomplicated as observing the physical substance. Test Tube A consisted of small black and white specks that could phyically be seperated when holding a magnet to the mixture. Because this is possible, it is a heterogenous mixture also because the seperation can easily be seen.…

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    The little instruction leaflet included in the pack, isn't particularly comprehensive, but still it was fairly easy to work out what I needed to do and before I could start I did need to do a little preparation. The instructions did state that I would be needed cold water but didn't say whether that water needed to have been boiled first or left to stand so that any chlorine could dissipate. As I do usually boil the water that I am going to use in a home brew and further along in the…

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    My topic of interest is the science behind slime. I have researched and found ideas that relate to topics we have learned so far in the first marking period in science. Slime is made up of elements that are mixed together. The "slime" formula is sodium tetraborate decahydrate (Na2B4O7•10H2O), commonly known as borax, to a solution of white glue and water. White glue is an example of a polymer--it is made of long chains of polyvinyl clear plastic film molecules. These chains slide past one…

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