Introduction to Acids Base chemistry Purpose How to determine the constant equilibrium of an acid‚ Ka? How to evaluate the concentration (M) of an acid? In “part A” experiment‚ we would test the PH of different concentration of acetic acid (a weak acid which partially dissociated in water) with a PH probe. After we got the PH‚ we could find out the concentration of H+ by applying the relationship pH = -log [H+]. Having the determined value of [H+] of a weak acid with a known molar concentration
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change during a neutralization reaction Introduction: When an alkali neutralizes an acid‚ a salt and water are formed. Aqueous hydrogen ions (H+(aq)) from the acid react with the hydroxide ions (OH-(aq)) from the alkali‚ forming water. For hydrochloric acid and sodium hydroxide: H+(aq) + Cl-(aq) + Na+(aq) + OH-(aq) → Na+(aq) + Cl-(aq) + H2O(l) Hydrochloric acid Hydrochloric acid Sodium Chloride Sodium Chloride Sodium Hydroxide Sodium Hydroxide Neutralization is an exothermic
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TITLE/PROBLEMS * Can peanut butter with seaweed extract be a main ingredient in making poisons for rats? * “Peanut-Weed Arsenic Poison” * “Peanut-Weed Rat Killer” RRS Why Do Poisons Matter? “Long after the 1962 publication of Rachel Carson’s book‚ Silent Spring‚ and the subsequent birth of the environmental movement‚ the days of concern over the effects of at-home and commercial pesticide use are long from over. Carson’s book described numerous environmental impacts of indiscriminate
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Acids‚ Bases and Buffers Lab Acids‚ Bases and Buffers Lab Results: The experimental results for part one is as follows: Part One Data Table | Initial pH | Final pH | Test Tube A | 6 | 1 | Test Tube B | 4 | 4 | Test Tube C | 4 | ----- | Test Tube D | 4 | 4 | Test Tube E | 6 | 11 | The experimental results for part two is as follows: Part Two Data Table | Before CO2 was Added | After CO2 was Added | Colour | Blue/green | Light green/yellow | pH Level | 8.0pH | 5.0pH |
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Acid-Base Titration Background Information A titration is a controlled addition of one substance into another substance. In an acid-base titration‚ the experimenter will add a base of known concentration to an acid of unknown concentration (or vice-versa). The goal of the titration is usually to use the substance of known concentration to determine the concentration of the other substance. In order to run a titration‚ the following materials are needed: • A buret filled with the base (or acid) of
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Equilibrium and Acid Base Test Review: May 2012 Things to know: 1. Explain DYNAMIC EQUILIBRIUM. Why does a reaction at equilibrium look like it is NOT reacting? 2. Are all reactions equilibrium reactions? What assumptions do we make when we say that a reaction does NOT take place or that it is UNIDIRECTIONAL and goes 100% to completion 3. Be able to sketch a graph of the following (assuming that you start with all reactants and no products) : a. A reaction that really doesn’t do anything
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Tacula‚ Jassy Camille D.S. Activity 11 Acids and Bases I. Objectives * To identify some acids and some bases which are used in common household products. * To construct an operational definition of an acid and a base‚ using the characteristic properties of those substances. II. Procedure A. For acids * Place 2ml each of dilute acetic acid‚ hydrochloric acid‚ sulfuric acid‚ carbonated drink (colorless) and calamansi juice extract in
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Acid/ Base Titration Lab Design III Materials: Goggles HCl NaOH Distilled Water Label Beaker Graduated Cylinder Pipet Stirring rod Buret with clamp Stopper Ring Stand Utility Clamp Computer Computer Program pH probe Procedure: 1) 2) Goggles were put on. 3) 0.1 M NaOH solution was made using 0.4 g NaOH and 100 mL distilled water. The ingredients were added together in a beaker and stirred. 4) The buret was standardized by adding 10 mL of distilled water‚ rolling
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Alvarenga Lab Partner: Keren Appiahene Mussie Gide 10 September 2016 Experiment 2: Acid- Base Extraction Separation of an Organic Acid‚ a Base and a Neutral Compound Introduction: The extraction technique is often used in the organic lab to separate organic compounds from mixtures. One type of an extraction technique is the acid-base extraction‚ which is used to separate organic compounds from a mixture based on their acid-base properties.1 There are certain principles that must be taken into account when
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______________________________________ Before you begin‚ save this Lab Report Template on your computer as LastNameAPChem7 Title: Acid Base Titration Purpose: To practice titration techniques To perform acid-base titrations To determine the molarity and percent composition of acetic acid in commercial vinegar Materials: |0.1 M sodium hydroxide |24-well reaction plate |toothpicks | |phenolphthalein test paper |small beakers
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