Angeles University Foundation Integrated School Angeles City GraPeNaTor: “Grapes’ Peelings extract‚ a Natural Indicator for acids and bases As a partial requirement for the 1st grading period Submitted by: Josh Wallen Beltran Riu Rodriguez Abbylaine Priniel Mikee Reyes Lesley Anne Timbol CHAPTER 1 I. INTRODUCTION Many natural substances contain molecules that change color in liquid solutions when the solution is changed from a basic to acidic nature or vice versa
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Purpose: To test the acidity and basicity of common household products using a premade cabbage juice indicator. Introduction Acids and bases are chemicals commonly used in the lab‚ and‚ even though we may not realize it‚ they are also found in substances we use at home on a daily basis. To test the acidity or basicity of a substance‚ we can titrate each until the endpoint is reached‚ or use an indicator. Something as simple as litmus paper can be used‚ whereby blue litmus paper will turn red in the
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ocean‚ which is a very stable one‚ all living things in the tank cannot tolerate many fluctuations. And since every living creature in any saltwater fish tank is taken from the ocean‚ you can maintain the stability of the environment by monitoring the PH‚ temperature‚ lighting‚ and salinity. A one degree increase in temperature in a salt water fish tank could cause the fish and reefs to become ill and shocked. Therefore‚ you must monitor the heater in your tank to make sure it is functioning properly
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Observations Name ___________________________ I. & II. Conductivity and pH of Acid/Base Solutions: Solution Strong or Weak Conductivity Strong or Weak Acid/Base pH 0.1 M HCl (aq) 0.1 M HC2H3O2 (aq) 0.1 M NaOH (aq) 0.1 M NH3 (aq) Question 1. Both acids above have the same concentration‚ 0.1 M‚ but they exhibit different pH value. Explain. Question 2. Both bases above have the same concentration‚ 0.1 M‚ but pH of NH3(aq) is lower than that of NaOH. Explain. 7 III. a) Observation
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determine the extent to which the compound is soluble in water. A known volume of 50 mL of hydrochloric acid‚ a concentration of 0.05 M hydrochloric acid‚ a volume of 50 mL calcium hydroxide base‚ an unknown concentration of base and an acid-base indicator (bromothymol blue) has been used in this experiment to determine the concentration of calcium hydroxide. From the results tabulated‚ a Ksp value of 1.26 x 10-7 has been retrieved indicating that calcium hydroxide has a low solubility in water. On
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a solution are called pH level. pH is a scale that is used to determine if solution is acidic ‚basic‚ or neutral. During Living Environment class‚ we conducted a experiment that allowed us to measure the pH levels of 3 solutions. We were split into groups and each person had to bring a household solution from around the house. There certain materials that were needed to conduct the experiment .The following materials are litmus papers‚ pH paper‚ pH indicator‚ a sheet of paper towel
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hydroxide ion to form water is widely used as the basis for volumetric determinations of acids‚ bases and salts of weak acids. The reaction is characterized by a rapid change in pH near the equivalence point‚ a change that is readily detected by an acid-base indicator or that can be followed electrically by use of a pH meter. Neutralization titrations are performed with standard solutions of strong acids or strong bases. A standard solution (or standard titrant) is a reagent of exactly known concentration
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Experiment 4: ACIDS AND BASES: PH Measurements and Macroscale Titration CHM023L – A12 Group no. 6 Members: | Contributions: | | Conclusion | | Recommendation | | Tables and figures with analysis | | Principles‚ Equation | | Abstract‚ tables | Date Performed: February 28‚ 2012 - Tuesday Date Submitted: March 6‚ 2012 - Tuesday Submitted to: ------------------------------------------------- ABSTRACT: This experiment introduces us the pH measurement and application of macroscale titration
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different properties between them: pH Scale Since acids increase the amount of H+ ions present and bases increase the amount of OH- ions‚ under the pH scale‚ the strength of acidity and basicity can be measured by its concentration of H+ ions. This scale is shown by the following formula: pH = -log[H+] with [H+] being the concentration of H+ ions. The pH scale is often measured on a 1 to 14 range‚ but this is incorrect (see pH for more details). Something with a pH less than 7 indicates acidic properties
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acid). An indicator anthocyanin will be added to the solution to change the color to pink. Anthocyanin is a water-soluble vacuolar pigment that may appear red‚ purple‚ or blue depending on the pH (Wikipedia). This pink color acts as a pH meter and will show a change in color to represent a change in the pH. As the base (sodium hydroxide) is added‚ the solution will then change color (this is referred to as the “stoichiometric end point”). This color change represents the increase of pH‚ as well
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