Indirect determination of ∆H via Hess’s law Conclusion & Evaluation Research question: What is the ∆H/mol of hydration of CuSO4 (anh)? The ∆H/mol of hydration of CuSO4 (anh) is -70.2‚ according to the experiment done in class. It was determined by applying the Hess’s law‚ using two reactions 1) CuSO4-5H2O ----> CuSO4 (aq) + 5H2O 2) CuSO4 (anh) -----> CuSO4 (aq) According to the Hess’s Law‚ which states that the total enthalpy change for a chemical reaction is the same disregarding
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Part I: Properties of Hydrates 1.Place about 0.1 g of the following compounds in each one test tube: CuSO45 H2O‚ CoCl26 H2O‚ NiCl26 H2O‚ and KAl(SO4)212 H2O. 2. Heat each test tube gently over a Bunsen burner flame and record your observations in your notebook. 3. After the sample has cooled‚ add a few drops of deionized water. What happens and what can be concluded? Part II:
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of substances produced in a chemical reaction. Materials: Safety Goggles Stirring rod Magnesium ribbon Solid CuSO4•H2O Matches Test tubes Copper metal 3M HCl Red and blue litmus strips 0.1M AgNO3 Zinc metal 0.1M Pb(NO3)2 Test tube holder 0.1M KI Bunsen burner 0.1M Na2NO3 Crucible tongs 1.0M NaOH Water (H2O) 0.1M Ca(NO3)2 50mL beaker 1.0 CuSO4 Procedure: Using the crucible tongs‚ take a magnesium strip and hold it in hot spot (just above the inner cone of
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Name: ____________________________________Period: _____ Date:____________ Lab 9: Formula of a Hydrate Lab Purpose: To utilize mole conversions to determine the ratio between copper (II) sulfate molecules and water of hydration. Materials: 1 Hot Plate 1 Wire Mesh 1 Small beaker 1 Glass Stirring Rod 1 Electronic Scale 1 Crucible Tong Copper II Sulfate Hydrate (approx. 5g) Procedure: 1. Mass small beaker (empty) 2
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Hydrate DESIGN – Aspect 1: Defining the problem & selecting variables Research Question: What percentage of Copper Sulfate Hydrate is water? Background Information: There are many ionic compounds that contain one or more waters of hydration in their formulae. They exists either in anhydrous or hydrated form. Most anhydrous compounds have a strong tendency to absorb water from the humidity in the atmosphere and shifts into a hydrated form. Because of that phenomenon‚ those compounds
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1. Sand 2. CuSO4 · xH2O salt 3. Evaporating dish 4. Analytical balance 5. Small testtubes 6. Drying flask 7. Thermometer 8. Electrical heater Experimental Procedure Results and calculations Mass of Test tube : 15.8945g Mass of Test tube + CuSO4 ∙ xH2O salt : 17.6698g Mass of Test tube + CuSO4 ∙ xH2O salt after heat for 30 min
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When hydrates are heated‚ the water of hydration evaporates and is released as vapor. The remaining solid is known as the anhydrous salt‚ which is the compound same compound without the water molecules trapped inside. Title: The title of the lab should be at the top of the lab report. Purpose: In one or two complete sentences‚ state the purpose of this laboratory investigation. Materials: List all of the materials (balance‚ crucible‚ etc.) used in this lab Procedure: Include
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METHODOLOGY Materials and Apparatus CuSO4 (size of a rice grain) Phenolphthalein indicator Ammonia solution (1 M NH3) Iodine crystals (I2) Graduated cylinder Procedure: Part 1 Diffusivity 1. Place a small amount of iodine in a beaker. Cover the beaker with a watch glass. Place a wet tissue paper on top of the watch glass. Then put it inside of the fume wood. 2. Heat the beaker inside the fume wood. 3. Observe
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WHAT IS PHARMACOGNOSY? Pharmacognosy is the study of drugs of natural origin. The term comes from two Greek words: "pharmakon" meaning drug or medicine‚ and "gnosis" meaning knowledge. The American Society of Pharmacognosy defines pharmacognosy as "the study of the physical‚ chemical‚ biochemical and biological properties of drugs‚ drug substances or potential drugs or drug substances of natural origin as well as the search for new drugs from natural sources". Plant preparations are said
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[ print page ]03.09 Molar Mass of Compounds: Determining the Formula of a Hydrate—Text Version When hydrates are heated‚ the water of hydration evaporates and is released as vapor. The remaining solid is known as the anhydrous salt‚ which is the compound same compound without the water molecules trapped inside. Title:The title of the lab should be at the top of the lab report. Purpose: In one or two complete sentences‚ state the purpose of this laboratory investigation. Materials: List
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