Chapter 1 1. INTRODUCTION Fishing‚ serves as one of the primary source of food and living for many Filipinos due to the Philippines archipelagic location. Furthermore‚ the tourism industry has been providing jobs making many locals be dependent on the marine environment for their everyday living. La Union‚ the “Surfing Capital of the North” is known for its massive waves perfect for the water sport that is surfing. Likewise‚ it is also known to be involved in the fishing industry. Fishermen
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determined using a Fischer-Johns melting point apparatus. The acid then dissolved in separate beakers with 95% ethanol and water and titrated with 0.050 M NaOH‚ previously standardized with potassium hydrogen phthalate‚ through potentiometric titration. The pH after addition of base was measured and plotted against the volume of titrant added using three different plots. Results show a 61.0% yield and the melting point differed from the theoretical by a range of 3.11-6.83%. The pKa calculated was 2.865‚ differing
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(cuvette). Accordingly‚ the value for Є is constant for a specific chemical species at a given wavelength. In this experiment‚ indicator dyes are good candidates for analysis‚ in that‚ these substances give varied colors when subjected to different pH environments. Indicators dyes are
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Observations of Chemical Changes Purpose: The purpose of this experiment is to observe chemical changes in common consumer products to determine if the chemicals are basic‚ acidic‚ or remain neutral when mixed with other chemicals. Procedure: In this experiment‚ various chemicals were mixed together‚ to determine a reaction. Using two drops from chemical 1 and two drops of chemical two‚ unless otherwise stated‚ then recording the type of physical reaction or color changes that occurred.
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Periodic Table: * Mass Number = protons + neutrons in the nucleus * Atomic Number = number of protons in the nucleus * Number of neutrons = mass number – atomic number Example: Lithium (Li) * # of protons + # of neutrons = mass # * 3 + 4 = 6.9/ 7 * The atomic mass is the mean of all the isotopes of Lithium in nature; round the number * Isotopes of a specific element have a varying number of neutrons * The number
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formatting of the pull quote text box.] [Type a quote from the document or the summary of an interesting point. You can position the text box anywhere in the document. Use the Drawing Tools tab to change the formatting of the pull quote text box.] pH < 7 | pH > 7 | Turn blue litmus red | Turn red litmus blue | Arrhenius Arrhenius Bronsted-Lowry Bronsted-Lowry Produce hydrogen ions | Produce hydroxide ions | Lewis Lewis A donor of hydrogen ions | An acceptor of hydrogen ions | Accepts
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Enzyme Activity Lab Objective: To determine the effect of temperature‚ PH and enzyme concentration on catalase activity. Introduction: What is an enzyme and how the enzyme works. Any of a group of complex proteins or conjugated proteins thatare produced by living cells and act as catalysts in specific biochemical reactions. The system in which enzymes work is often referred to as the ’lock and key’ system it’s where the enzyme and the substrate lock together. The substrate then unlocks into
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From performing the pH experiment it has proven that pH buffer 7 is the optimum pH for catalase in potatoes. This is because the height of the bubbles was the highest of all three tests (pH 3‚ pH 7‚ pH 9) reaching an average height of 0.433 cm. See graph 3. While pH buffer 3’s average height was 0.233 cm only reaching a maximum height of 0.3 cm in Trial 3 and pH buffer 9’s average height being 0.333 cm only reaching a maximum height of 0.4 cm again in Trial 3. See table 1. Therefore this supports
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concentration of an acid‚ specifically H3O+‚ or a base‚ specifically OH-‚ in a solution will cause that solution to have a specific pH. Recall that pH is a logarithmic scale that is based on the concentration of H3O+ in solution. The pH scale ranges from 0-14‚ with an acidic solution having a pH lower than 7 on the pH scale and a basic solution having a pH greater than 7 on the pH scale. The word titration comes from the Latin word "titulus"‚ which means inscription or title. The French word title means
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Investigation into how pH levels affect Catalase activity in potato samples – (enzymes) Introduction: The aim of this investigation is to understand and monitor the effects pH levels have on catalase activity within controlled potato samples. Catalase is a type of enzyme that is found widespread among organisms that grow in the presence of oxygen (almost all living things) its specific use is to speed up the decomposition of Hydrogen peroxide (H2O2) within cells. Hydrogen peroxide is a bi-product
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