06.03 Calorimetry: Lab Report Procedure: Part II: Determining the Specific Heat of an Unknown Metal Data and Observations: Part I: Determining the Specific Heat of a Known Metal Metal: Aluminum Zinc Iron Copper Mass of metal 27.776g 41.664g 34.720g 41.664g Volume of water in the calorimeter 26.0mL 26.0mL 26.0mL 26.0mL Initial temperature of water in calorimeter 25.3 °C 25.3 °C 25.3 °C 25.3 °C Temperature of hot water and metal in hot water bath 100.5 °C 100.5 °C 100
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Determining the Specific Heat of an Unknown Metal Objective: To determine the specific heat of an unknown metal through the use of a calorimeter. Background: The specific heat of any substance represents the quantity of heat energy in joules required to heat one gram of the substances by one °C. The specific heat of a substance is dependent upon the temperature; this means that there is a temperature range for which the specific heat of a substance applies. For metals and metallic substances
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Results : Calculation : Part A Molecular weight of 1M of NaOH = 23g/mol + 16g/mol + 1g/mol = 40g/mol 1M = 40g/mol dissolved in 1L and 20g dissolved in 500ml 20g of NaOH was used to prepare 500ml of 1M NaOH. Part B Molecular weight of 1M of HCl = 35.5g/mol + 1g/mol = 36.5g/mol Specific gravity = 1.19kg/L 37% HC1 × 1.19kg/L = 0.44kg/L Convert w/v to mol/v = = 12mol/L = (12mol/L) = (1M)250ml = 20.83ml ≈ 21ml 21ml of concentrated HC1 is used to prepare 250ml of 1M of HC1. Part C For 0.1N of NaOH
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Figure 1: Titration curve of 0.160 grams of an unknown diprotic acid that was dissociated in distilled water. Shown is the pH versus the volume in milliliters of 0.1 M NaOH‚ a strong base‚ added to the solution. The initial pH reading of the solution was a pH of 2.60. Although the pH of the ½ equivalence point was unknown‚ it could be estimated by halving the volume of NaOH used at the first equivalence point. At the first equivalence point‚ 13.63 milliliters of NaOH had been added to the unknown
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Question # 1: You are titrating 50 ml. of nitrous acid with sodium hydroxide (0.15 M). Equivalence is reached at 22.0 ml of NaOH delivered. Calculate the pH of the solution in the flask: a- before the beginning of the titration - after the delivery of 5 ml. of titrant b- at half-equivalence c-at equivalence d-after delivery of 23 ml. of titrant Part A) Reaction is: HNO2 + OH- NO2- + H2O Ka for Nitrous acid = 7.2E-4 Kw = Ka*Lb Kb = 1.0E-14/7.2E-4 Kb = 1.38E-11 Moles of base:
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The dissolution of the drug in different liquisolid formulations was performed in 500 ml simulated salivary fluid (phosphate buffer pH 6.8) maintained at 37 ± 0.5 ºC using the USP dissolution tester apparatus II‚ at a rotation speed of 50 rpm. Aliquots from the dissolution medium were withdrawn at 1‚ 2‚ 3‚ 4‚ 5‚ 6‚ 7‚ 8‚ 9‚ 10‚ 12.5‚ 15‚ 20‚ 25 and 30 minutes time intervals. The samples were changed with fresh dissolution medium of same amount to maintain a constant volume in the vessels. Samples
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The Outsiders Why do people fight? In the fictional book The Outsiders‚ written by S.E Hinton‚ a 14 year old boy learns the way of street life by getting hurt. The story takes place in Tulsa‚ Oklahoma during the 1960s. There are two gangs that live in Tulsa‚ the Socs and the Greasers. The characters Ponyboy‚ Sodapop‚ Darry‚ Sandy‚ Steve‚ Evie‚ Two-bit‚ Johnny‚ and Dally are all part of the Greasers gang. Cherry‚ Marcia‚ Sylvia‚ Bob‚ and Randy are in the Socs gang. Ponyboy‚ the main character
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The movie The Outsiders by S.E Hinton and the book were very different from each other. Ponyboy‚ Johnny‚ and Dally are three characters that I noticed were the most different. These three are part of a gang called “Greasers” along with four others. In the book‚ Ponyboy has a good relationship with is brother Sodapop but doesn’t get along well with his oldest brother Darry. He is a good reader as well as successful in track. In the movie he still has a good relationship with Sodapop‚ but he gets along
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Symbolism is a person or thing that represents someone or something. The Outsider is a novel about the different social classes. In the novel The Outsider‚ by S.E. Hinton uses symbolism many times. Ponyboy’s long hair has a symbol‚ and so does his short hair. Pony’s long hair makes him feel tuff. Pony says “not too short‚ Johnny please…My hair looked funny‚ scattered over the floor in tuft.”Ponyboy’s Long hair makes him feel he is going to be a greaser his whole life‚ and he isn’t going to make anything
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For my unit 4 novel I read The Outsiders by S.E. Hinton it takes place in Tulsa‚ Oklahoma in 1965. It is told in the first person narrative by PonyBoy Curtis. The main characters of the outsiders are PonyBoy‚ Johnny‚ Dally‚ Darry‚ and Sodapop. Both groups of boys such as the greaser (the main characters and more) and the Socs‚ the Socs are apart of the conflict. I personally like this book because of PonyBoy’s perspective on everybody‚ as him being the narrator and the way he thinks would have been
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