Pre Lab Questions 1. What are the basic units of length‚ mass‚ volume‚ and temperature in the SI system? Length= meters (m) Volume= kilograms (kg) Temperature= Kelvin (K) 2. What decimal power do the following abbreviations represent: a) M=10^6 b) K=10^3 c) M=10 ^-3 d) N=10^-9 e) µ=10^-6 3. What is the number of significant figures in each of the following measured quantities? a) 351 g 3 b) 0.0100 mL 4 c) 1.010 mL 4 d) 3.72 x 10^-3 cm 3 4. What is the length of a crystal
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LAB OF ENTHALPY CHANGE IN COMBUSTION Objective: Determine the Enthalpy change of combustion ΔHc of three different alcohols. Methanol‚ Ethanol and Isopropilic acid. Procedure: 1. Fill the spirit micro burner with Ethanol and weight it 2. Pour 100 cm3 of water into the aluminum cup 3. Arrange the cup a short distance over the micro burner 4. Measure the temperature of water 5. When the temperature of the water has risen by 10°C‚ record the temperature. 6. Reweight
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Two values present in this story are determination and honesty. Danny shows determination when Ross Pickett‚ his father‚ wants to make Red a varmint dog. However‚ Danny had just talked to Mr. Haggins‚ Red’s owner‚ about dog shows. Danny learns that if a competitor wins‚ it is one mark that proves to the first owner of an Irish setter that they succeeded. This puts Danny to thinking about dog shows‚ Irish setters‚ and mainly Red. He feels that Red was born and made to be a partridge dog and he should
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ISE Determination of Fluoride Content in Various Substances CHM 222 – A 4 / 20 / 2007 Introduction: The ion selective electrode used was made up of a silver / silver chloride reference electrode and a glass electrode. The pH of the electrochemical cell is determined by monitoring the electrical potential difference between the half-cells. The glass electrode is an ion selective electrode (ISE)‚ which only responds to the hydronium ion concentration / activity in a solution under a
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Determination of Iron by Reaction with Permanganate-A Redox Titration Purpose: The purpose of this experiment was to find the percentage of iron in an unknown iron oxide sample which could be determined through titration with a standard solution of potassium permanganate. Success in this analysis requires careful preparation and attention to detail. Performing this experiment also provides practice at titrations. The overall reaction is: 8H+(aq) + MnO4-(aq) + 5e- Mn2+(aq) + 4H2O Theory:
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record a thermogram. YOU CAN NOW MOVE ONTO THE STEPS TO RECORD AND DETERMINE THE CALORIMETER CONSTANT FOR EACH OF THE 4 PROVIDED CUPS. 1. Obtain two of the same cup types‚ in example two styrofoam cups‚ and a lid from your instructor or the lab stock room to serve as the calorimeter. Nest one cup inside the other to construct
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For instance‚ one who comes from hardship certainly can work through and excel in a way some call unbelievable due to grit. A passionate individual who stays committed to a long term goal will not have things handed to them by chance‚ but will work hard to achieve challenging goals. By being steadfast‚ one’s tenacity is admirable especially when becoming triumphant against all odds. As Angela Duckworth‚ professor of psychology‚ states in her best seller Grit‚ “The highly accomplished are gratified
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Eric Bryan Period 4 Calorimetry Lab Theory: To most people heat and temperature are generally the same thing. But really in a scientific sense there is still a similarity between them but they are different concepts. Temperature is the measure of the average energy of molecular motion in a substance. Heat is the total energy of molecular motion in a substance. Temperature is not energy like heat is‚ it is just measure of it. Now there is also a difference between heat and thermal
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Self-Determination Theory and Sport Brilliance The focus of this critical reflection is the significance of the volitional attribute of the self-determination theory in relation to sport performance. As opposed to external incentives‚ this theory points out the intrinsic propensity for personal growth and development in an environment that encourages these elements. The self-determination theory contains 5 separate theories that combine to define the concept of motivation and development. This paper
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Lab Partner: Sunny Zhao 20C: Acid-Base Titration Purpose/Objective: 1. To titrate a hydrochloric acid solution of unknown concentration with 0.50M sodium hydroxide‚ and determine the molarity of the hydrochloric acid 2. To titrate an acetic acid solution with 0.50M sodium hydroxide‚ and determine the molarity and percentage composition of the vinegar. Apparatus and Materials: Please refer to P.236 of Health Chemistry Laboratory Experiments. Procedure: Part I Determination of molarity
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