Introduction to Chemistry Laboratory: A Lesson on Tools‚ Techniques and Measurements PURPOSE: The purpose of this set of experiments (3 total) is to become familiar with the common types of laboratory glassware and equipment‚ and how to obtain and analyze data from these items. LEARNING OBJECTIVES: By the end of this experiment‚ the student should be able to demonstrate the following proficiencies: 1. Know which glassware (beakers‚ burettes‚ pipettes‚ graduated cylinders‚ flasks‚ etc) should
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Determining Stoichiometric Ratios: NaOH and HCl & NaOH and H2SO4 Reactions Contents Introduction 3 Materials & Procedure 4 Raw Data 8 Processed Data 15 Graphs 16 Conclusion & Evaluation 17 Introduction Background Information Stoichiometry is a critical component in chemistry‚ and helps in understanding the quantitative relationship between the number of moles of reactants and products in a reaction. Objective In this experiment‚ the reactions
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Well-Plate-96. The mixtures were done in the following order‚ and the reaction‚ along with the plate number were recorded on a data table. 1. NaHCO and HCl-CO_2 2. HCl and BTB 3. NH_3 and BTB 4. HCl and blue dye 5. Blue dye and NaOCl‚ and then one drop of HCl 6. Kl and Pb(NO_3)_2 7. NaOH and AgNO_3 8. HCl and phenolphthalein 9. NaOH and AgNO_3 10. AgNO_3 and NH_3 11. NH_3 and CUSO_4 I observed all of these reactions on the backdrop of a white and
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lab manual. At this point I realized why we had to have distilled water. Data Table 1 – Observations of Chemical Changes‚ using chemicals supplied Well # Chemicals Used Reaction Paper Change A1 NaHCO3 and HCl - C02 white bubbles formed more noticable when placed on black paper B1 HCl and BTB turned bright yellow/orange darker
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TWO-BASE EXTRACTION OF BENZOIC ACID‚ 2-NAPHTHOL‚ AND NAPHTHALENE FROM UNKNOWN SAMPLE # 131 Douglas G. Balmer (T.A. Mike Hall) Dr. Dailey Submitted 11 July 2007 Introduction: The purpose of this experiment was to separate a sample of benzoic acid‚ 2- naphthol‚ and naphthalene of unknown proportions using a two-base extraction method. The three components of the mixture will react differently to sodium bicarbonate and sodium hydroxide because each of the bases’ conjugate acids has a different
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Balancing Chemical Equations Answer Key Vocabulary: coefficient‚ combination‚ compound‚ decomposition‚ double replacement‚ element‚ molecule‚ product‚ reactant‚ single replacement‚ subscript Prior Knowledge Questions (Do these BEFORE using the Gizmo.) [Note: The purpose of these questions is to activate prior knowledge and get students thinking. Students are not expected to know the answers to the Prior Knowledge Questions.] The scouts are making s’mores out of toasted marshmallows‚ chocolate
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Chemical Reactions and their Classifications 26 October 2012 Abstract: Ordinary laboratory ware was used to determine how many of what type of chemical reactions occurred. This yielded three decomposition reactions‚ four substitution reactions‚ and three metathesis reactions. Introduction There are many different types of chemical reactions in the study of chemistry; A composition reaction (also known as synthesis) is defined as the reaction that occurs when two single compounds combine in
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LAB REPORT 5 – ACID/BASE CHEMISTRY No credit will be given for this lab report if the Data section is not completely filled out and if the required photographs are not received. At least one photograph must show the student’s face. NOTE: This experiment is rather lengthy. Plan accordingly. OBJECTIVES 1. Define strong electrolyte‚ weak electrolyte‚ nonelectrolyte‚ acid‚ base‚ salt‚ strong acid‚ weak acid‚ strong base‚ weak base‚ and neutralization reaction. 2. Compare and contrast the chemical
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1 Solutions and Solubility Chapters 4+13 2 The Solution Process • A solution is a homogeneous mixture of solute (present in the smallest amount) and solvent (present in the largest amount) State of Solution State of Solvent State of Solute Example Gas Gas Gas Air Liquid Liquid Gas O2 in water Liquid Liquid Liquid Alcohol in water Liquid Liquid Solid Salt in water Solid Solid Gas H2 in Pd Solid Solid Liquid Hg in Ag Solid Solid Solid Ag in Au 3 The Solution Process
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water. It is so called since it can be easily removed simply by boiling with bicarbonates readily getting precipitated. Ca(HCO3)2 à CaCO3 + H2O + CO2 Mg(HCO3)2 à MgCO3 + H2O + CO2 Ca(HCO3)2 /Mg(HCO3)2 + 2C17H35COONa à (C17H35COO)2 Ca/Mg + 2 NaHCO3 CaCl2/MgCl2 + 2C17H35COONa à (C17H35COO)2Ca/Mg + 2NaCl CaSO4/MgSO4 + 2C17H35COONa à (C17H35COO)2 Ca/Mg + Na2SO4 2. Permanent Hardness/Non-alkaline/Non-carbonate is due to the presence of dissolved sulfates & chlorides of Ca‚ Mg‚ Fe‚ etc in water
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