|Mg |Cu |Pb | | |(+) clear liquid but the |(+) a black spot appeared on|(-) no reaction occurred |(-) no reaction | |Pb(NO3)2 |Zinc itself turned glittery |the sliver of magnesium. | | | | |(+) the liquid looks |(+) There was also a black |(+) The copper almost
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What does chemistry do to help us and how important is it? To go about answering these questions‚ we must find out where in our daily activities‚ chemistry is involved and how it benefits us. Without realising‚ chemistry is used in all part of our lives and some of its features are more recognised by specific user groups‚ for example a kid wouldn’t be interested in how chemistry makes their fathers shaving foam more lubricant. I believe looking at the problem from this perspective would
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Experiment no. 2 Classification of Matter Morillo‚ Mary Jane J. Nidua‚ Maria Angelene Group no. 2/Chemistry Lab./Engr. Ma. Jeanette U. Obias Abstract The classification of matter was demonstrated through simple activities of mixture‚ heating and magnetic attraction describing its physical state ‚ its chemical reactions and its separation to other substances. Simple reagents such as Iron filings and Sulfur powder in our experiment were considered as elements‚ while solid mixtures such
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Compound for Hand warmer Author: Jane Kim (B2) Partners: Jenny Kim‚ Jeffrey Heo‚ Eugenia Lee Experiment date: March 2‚ 2017 Table of Contents 1. Abstract 3 2. Introduction 3 3. Experimental details 4 3-1. Materials 4 3-2. Apparatus 7 3-3. Procedure 7 3-4. Special Precautions 8 3-5. Lab techniques 9 4. Results 9 5. Discussion 14 6. Conclusion 16 7. References 17 1. Abstract This lab report discusses an experiment to study thermodynamics and find ideal ionic compound to be used in hand warmer.
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Dark Orange LiNO3 Red Sr(NO3)2 Dark Red KNO3 Blue-Indigo Ba(NO3)2 Yellow-Green Cu(NO3)2 Green Ca(NO3)2 Red-Orange Ni(NO3)2 Yellow-Green Materials: Nichrome test wire Bunsen Burner 150 mm test tubes (14) 6.0 mol/L HCl Solid NaCl 0.50 mol/L NaCl 0.50 mol/L NaNO3 0.50 mol/L LiNO3 0.50 mol/L Sr(NO3)2 0.50 mol/L KNO3 0.50 mol/L Ba(NO3)2 0.50 mol/L Cu(NO3)2 0.50 mol/L Ca(NO3)2 0.50 mol/L Ni(NO3)2 50 mL beaker Bunsen Burner lighter
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4/2/14 Period: 1st Chemistry Sour Acids and Bitter Bases Purpose: The purpose of this lab was to observe the different reactions formed between various acids and bases with the aid of indicators. Equipment: 1. Safety goggles. 2. Droppers. 3. Red Litmus paper. 4. Blue Litmus paper. 5. pH paper. 6. Well plate. 7. Micro spatula. Materials: 1. Zinc. 2. Magnesium. 3. Iron. 4. Copper. 5. HCL. 6. HC₂H₃O₂. 7. NaOH. 8. Phenolphthalein. Procedure: Part A: 1. Add five drops
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Determining the equilibrium constant from pH values of changing concentrations of ethanoic acid Design Research question: How will altering the concentrations of ethanoic acid affect the pH value‚ and‚ in-turn‚ the equilibrium constant? Background information: When weak acids react‚ the reaction typically does not go to completion. Rather‚ the system goes to an intermediate state in which the rates of the forward and reverse reactions are equal. Such a system is said to be in chemical equilibrium
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Student Mrs. Teacher Class Date Katie Limbach Mrs. Falk Chemistry 09-13-13 Title: Properties of Gases Purpose : The purpose of this lab was to learn about properties‚ both physical and chemical‚ of gases and to be able to identify them. Materials: Matches Toothpicks Pie tin Marker White Vinegar Hydrogen peroxide Measuring spoons Straw Tissue paper Baking soda Test tubes 24 Well Plate Pipet Stoppers for the test tube Chemicals provided by Labpaq Procedure:
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Discussion: The experiment lacked a proper control - While the experiment could not answer the research question‚ this does not disprove the possibility for the choice of bread to affect blood glucose levels; the obtained results were simply not sufficient to prove a connection. This might be due to several reasons‚ but as the experiment lacked a control subject which the other values could have been compared to‚ the results are completely unusable. However‚ there is no consistency in the results
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the start with slight particles showing‚ once adding the salt it still appeared clear. 2. Nasal Irrigation Saline- Solution appeared cloudy once adding the salt and baking soda‚ then it turned semi-clear about 30 secs later; it was more concentrated than the normal saline. Results: 1. Determine the molar mass of NaCl. Show the workup. Na= 23g/mole Cl= 35g/mole Molar mass of NaCl 23g/mole+35g/mole= 58g/mole 2. Determine the molarity of the two solutions you prepared in terms of NaCl. Show the
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