Week 10: Oxidation and Reduction Reactions: The Reactions of Copper Data: Part I: Preparing a solution of copper (II) nitrate Initial mass of copper wire: .520g Mass of copper wire after vigorously scouring: .518g Observations of Copper (II) ribbon mixed with HNO3: Solution turned green. Thick brown gas formed. Copper (II) bubbled vigorously. Cu (II) dissolved‚ solution appeared green/blue. After the addition of H2O a blue crusty precipitate formed. Part II: Synthesis of solid copper
Premium Copper Sulfuric acid Zinc
Abstract “Reaction Time” is the interval of time between the application of a stimulus and the detection of a response and has been thought to differ based upon the effects of modality and warning signals. In the “Reaction Time” experiment a total of 24 students from the University of Cincinnati participated in an experiment consisting of two sensory modalities‚ audition and vision‚ which were combined with two levels of warning signal status. The two levels of warning signal status were signal
Premium Sensory system Computer
give rise to precipitation? Tube 1: 5.5mls of (NH₄)₂SO₄ was required to give rise to precipitation. 5.5ml/20ml *100% = 27.5% Tube 2: 6.7mls of (NH₄)₂SO₄ was required to give rise to precipitation. 6.7ml/20ml *100% = 33.5% Tube 3: 5.6mls of (NH₄)₂SO₄ was required to give rise to precipitation. 5.6ml/20ml *100% = 28.0% Tube 4: 6.2mls of (NH₄)₂SO₄ was required to give rise to precipitation. 6.2ml/20ml *100% = 30.5% 1. From the absorbance readings before and after the precipitation‚ calculate
Premium Water Solubility Precipitation
II. LEARNING OBJECTIVES - To perform different types of chemical reactions including acid-base‚ precipitation‚ gas forming‚ complex compound forming and oxidation-reduction reactions. - To identify some of the products in these reactions and describe the chemical changes. - To write and balance the chemical equations for the reactions observed. III. EQUIPMENT AND REAGENTS 1. EQUIPMENTThirty test tubes One test tube rack Two test tube holders Two spatulas Three 250 mL beakers One stirring rodOne
Premium Chemical reaction Chemistry Solubility
1. What features make The Awakening a "local color" story? Three main related factors make Chopin’s short novel a local color story: The amount of time she spent describing things‚ the setting‚ and the language used. 2. What customs and beliefs of Edna Pontellier’s society are significant in relation to her psychological development? The flashbacks show Ednas rebellious natrures where there even before the awakening. 3. What attitudes and tendencies in the Creole characters does Edna have trouble
Premium Short story Fiction Sociology
Solvent/Water Trap Diagram Rodney Atwaters Halle Bair May 28‚ 2013 Chemistry 36100 Introduction The purpose of this lab was to produce benzoic acid by mixing sodium benzoate with hydrochloric acid. The Hydrochloric acid used in the experiment was a stock solution made by mixing HCl Acid and deionized water. HCl acid‚ historically called‚ muriatic acid or spirits of salt‚ hydrochloric acid is produced from sulfuric acid and common salt‚ NaCl (Princeton.edu). Since the early 1900 ’s‚ sodium
Premium Hydrochloric acid Chlorine Chemistry
of hydrogen peroxide‚ the reaction occurred again. Again‚ small bubbles formed; intensity of (1). The solution did not change in temperature. The reaction lasted about 15 minutes. 3. After adding more manganese dioxide‚ the reaction occurred again. This time‚ the bubbles being formed were larger; intensity of (4). The solution got a little warmer‚ but the difference in temperature was hardly distinguishable by simply touching the test tube. The reaction lasted about 10 minutes. 4. a) The hydrogen
Free Chemical reaction Enzyme Catalysis
You have graduated from your BSc degree at LSE and have taken up a position as a management consultant. One of your first assignments is to plan and implement a downsizing programme for a small retail chain that employs 90 workers; 10% of these employees are to be made redundant. How can you use the research on organisational justice to 1) decide whom to lay off‚ and 2) minimize negative outcomes of the downsizing process? With the increasing competition in today’s globalized market‚ lowering
Premium Layoff Distributive justice Retailing
01_anthrax.pdf http://ahd.kerala.gov.in/index.php/livestockdiseases?start=3 http://www.who.int/csr/resources/publications/anthrax/whoemczdi986text.pdf http://books.google.com.ph/books?id=EKYihvnaA7oC&pg=PA136&lpg=PA136&dq=ascoli%E2%80%99s+thermo+precipitation+test+procedure&source=bl&ots=EghgCCoqbO&sig=t0pQ_LpGC0HLOqsod228WGWYP5k&hl=en&sa=X&ei=tF4bUZ7xIsftrAf584CQBw&ved=0CGIQ6AEwCA#v=onepage&q&f=false http://www.austincc.edu/microbugz/starch_hydrolysis.php http://www.microbelibrary.org/index.php?op
Premium Bacillus Bacteria
Preservation of Food with Ionizing Energy Lesson 10 1 Assigned Readings – n Smith‚ J.S. and Pillai‚ S. 2004. Irradiation and Food safety. Food Technol. n Fact sheet on Food Irradiation http://www.inspection.gc.ca/food/information-for-consumers/fact-sheets/labelling-food-packaging-and-storage/irradiation/eng/1332358607968/1332358680017 n Frequently Asked Questions regarding Food Irradiation 2 Terminology n Radiation ¨ ¨ n Food irradiation ¨ n Rays of energy Emission and propagation of
Premium Ionizing radiation Gamma ray Electromagnetic radiation