HCI and the indicator (phenolphthalein)‚ then the endpoint of titration will be reached‚ causing the solution to turn colorless. II. Data Table 1: Acid or Base in household cleaner Name of cleaner or vinegar Vinegar Acid or Base Contained NaOH Molecular Mass 60.6 g Table 2: Known (acid or base) in Unknown (vinegar or cleaner) Trial 1 Trial 2 1. Mass of flask + unknown 148.5 g 147.9 g 2. Mass of empty flask 127.7 g 127.7 g 3. Mass of unknown 20.8 g 20.2 g 4. Cm3
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alcohol – Water: Hydrogen bonding and van der Waals forces Ethyl alcohol – Dietheyl Ether: Dipole – (induced) dipole and van der Waals forces For Acidic Compounds: Benzoic Acid – NaOH: Ion – (induced) dipole and van der Waals forces Benzoic Acid – NaHCO3: Ion – (induced) dipole and van der Waals forces Phenol – NaOH: Hydrogen Bonding‚ Ion – dipole‚ and van der Waals forces For Basic Compound(s): Aniline – HCl: Ion – dipole and van der Waals forces For Neutral Compounds: Benzyl alcohol –
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reactions involving copper. Procedure 1.Measure about 1g of solid copper. 2.Place Cu in Erlenmeyer flask and place flask under fume hood. 3.Add dropwise 15M HNO3 until solid copper is completely reacted. 4.Place flask in water bath. 5.Add 4M NaOH slowly until no more solid forms. 6.Mix contents by slowly swirling flask. 7.Place flask back in water bath‚ heat to boiling‚ and stir. 8.Heat until separation of solid and solution. 9.Cool flask and allow contents to settle. 10.Decant liquid
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Shift | NaOH (Step 5) | OH⁻ | Green | Left | NaOH (Step 6) | OH⁻ | Blue | Left | HCl (Step 3) | H⁺ | Green | Right | HCl (Step 4) | H⁺ | Yellow | Right | Part II: Equilibrium Involving Thiocyanatoiron (III) Ion Table 2 Reagent Added | Stress (Ion Added) | Spectator Ion | Observation | Direction of Equilibrium Shift | KCl | None | K⁺‚ Cl⁻ | No Change | No Change | Fe(NO₃)₃ | Fe³⁺ | NO₃⁻ | Solution Darkens | Right | KSCN | SCN⁻ | K⁺ | Solution Darkens | Right | NaOH | OH⁻ | Na⁺
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unkown solution using pH standards. In the Chromatography‚ we are trying to separate the chemicals using water and a piece of paper. Methodology Materials: Safety Goggles pH indicator & pH indicator key Known solutions of HCl‚ CH3COOH‚ NH3‚ NaOH‚ and H2O Numbered unknown solutions Chromatography paper strip with test sample A plastic jar Water A toothpick Chromatography Procedures: i. Add a small amount of water to the chromatography jar. The water should be approximately 30mm from
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Appendix APPENDIX 1 Chemical tests for functional groups Homologous series/ Typical compound Functional group(s) Alkanes CH3CH3 ethane C – C and C–H Alkenes CH2 = CH2 ethene C=C Chemical tests/Observations Add liquid bromine in ultraviolet light (or sunlight): White fumes of HBr liberated; decolourisation of bromine occurs slowly (a) Add Br2 in CCl4 at room temperature: Decolourisation of bromine occurs immediately CH2 = CH2 + Br2 → CH2BrCH2Br (b) Add acidified
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1. Provide a general discussion of the solubility/miscibility behavior observed in procedure A-D. For part A of the procedure we worked with the solubility of solid compounds in various solvents. The three solid compounds that were worked with during this procedure were benzophenone‚ malonic acid‚ and biphenyl. These three solids were then mixed with water (highly polar)‚ methyl alcohol (intermediately polar)‚ and hexanes (nonpolar). When benzophenone is mixed with water the results turned out to
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Purity of Aspirin Objectives - To research‚ using various sources‚ the history of aspirin‚ its use in medicine‚ methods of synthesizing it and of measuring its purity - To compare the % purity of a branded aspirin tablet with a generic aspirin tablet - To compare 2 methods of composition analysis of the two types of aspirin Research
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which a 4.2 mL concentrated HCl was added to a 500.0 mL of distilled water. It was stirred and transferred to an Arrhenius storage bottle. After preparing‚ it was then standardized in which the prepared solution was used as a titrant and a standard NaOH as the analyte. An indicator methyl orange was added by adding 3 drops to the analyte then it was titrated until the orange-colored
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Almero‚ K. J. Date Due: 3 July 2013 Dante‚ R. A. Date Submitted: 3 July 2013 EXPERIMENT NO. 3 DENATURATION OF PROTEINS Abstract The experiment aimed to use the concept of viscosity to study the effects
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