The purpose of this lab is to focus on how to make zinc iodide in a different way using compounds instead of elements, which are barium iodide and zinc sulfate. We will see if the reaction between these two compounds will occur and make a prediction by writing a chemical equation. The procedures for this lab are to place a small test tube inside a 50mL beaker and weigh it. Then, using a spatula, add 0.45±0.03 g of zinc sulfate heptahydrate into the small test tube and record the mass. After that, dissolve the sample in 2 mL of deionized water and shake the test tube for 1 to 1 ½ minutes to dissolve the solid.
Chem. 317 Title: The Synthesis of Chloropentaamminecobalt(III) chloride and Linkage Isomerization to Further Synthesis Pentamminenitrocobalt(III) chloride Experimental: Ammonium chloride (.0467 mol) was diluted in concentrated aqueous ammonia (15 ml) in a 125ml Erlenmeyer flask. CoCl26H2O (.0210 mol) was then added to the ammonium chloride solution. The ammonium chloride solution was heated and stirred while 30% hydrogen peroxide (4 mL) was added drop wise. The reaction was monitored and removed from the heat once the effervescence ceased, and then was allowed to cool.
10/8/13 Lab Report Introduction The purpose of the experiment was to do three different reaction and calculate the enthalpy change of the reaction with Hess’s Law. Then compare your calculated results to the results from the experiment. Experimental Design Materials: Vernier computer interface Computer Temperature Probe Two styrofoam cup 100 mL graduated cylinders Glass stirring rod 2.0 M Hydrochloric acid, HCl, solution 2.0 M Sodium Hydroxide, NaOH, solution 2.0 M Ammonium Chloride, NH4Cl, solution 2.0 M Ammonia, NH3, solution Ring Stand Utility Clamp Fume hood or well-ventilated room Magnetic Stirrer Paper Lid Procedures: Use proper lab safety and wear safety glasses, and make sure in well-ventilated room. Connect the temperature probe to the Vernier interface in the Channel 1 port. Then connect interface to the computer using the USB cable.
EXPERIMENT: TECH 0704, Distillation, macroscale technique only, simple and fractional: Substitute a mixture of 25 mL ethanol and 25 mL water for the toluene/cyclohexane mixture. Record the temperature at 2 mL intervals of distillate. Use glass beads to pack the fractionating column. Construct a graph of temperature vs volume for each distillation in your lab notebook. Compare the efficiencies of the two distillation methods in your lab notebook.
A voltmeter was used to measure the electrical resistance of different solutions. * Experiment and Observation: The plastic and glassware used in this experiment was thoroughly washed with hot water and rinsed with distilled water. * * Part I: Preparation of Standard Phosphate Solutions 1. 1.0 ppm standard: 1.00 mL of 10.0 ppm phosphate solution was placed in a 25 mL graduated cylinder and diluted to exactly the 10 mL mark with distilled water then poured into a plastic cup labeled 1. Cylinder was rinsed with distilled water.
Then you put the remaining liquid (neutral component mixture) through the suction ﬁltration funnel to isolate the crystals. After 10-15 minutes, the crystals will be dry and you can weigh them and ﬁnd their melting point. How is the neutral component of your 3-compound mixture isolated from the ﬁnal methylene chloride solution? 16 of 22 4/16/12 9:15 PM StudyBlue Flashcard Printing of Lab Final 2211L UGA http://www.studyblue.com/servlet/printFlashcardDeck?deckId=... Name the four active ingredients that we will be testing for in the TLC of Analgesics lab: Ibuprophen Caffeine Acetaminophen Acetylsalicylic acid What solvent system will you be using to dissolve the common analgesics (power) in preparation for TLC spotting? Methylene chloride: ethanol (1:1 solution) What solvent system will you be using to "develop" your TLC plates in the TLC of Analgesics lab?
5) Swirled the solution until the NaEDTA (s) dissolved entirely. 6) After dissolving the solid, deionized water was added to the volumetric flask to make 250mL of EDTA solution. 7) This solution (from Step 6) was then transferred to a clean 250 mL Erlenmeyer flask and placed inside the desk for safe keeping; using a cork wrapped tightly in Parafilm. The disassociation of NaEDTA in water is expressed by the following equation: Na2H2EDTA (s) + H2O (l) yields EDTA4- (aq) + 2Na+(aq) + 2H+(aq) Na2H2EDTA (s) has a molar mass of 372.24 g/mol. Procedure - Reacting EDTA with your Zinc ion in Zinc Iodine Purpose; The
Part A: Spectroscopy 1. 0.05g of Iron(III) Nitrate in a 50-ml beaker. Add 17 mL of distilled water to the beaker and mix with a stir rod until the solid is completely dissolved. 2. Obtain another 50-mL beaker and add 0.05g of Chromium(III) Nitrate to the beaker.
Experiment 2 Time | Observations | 5 minutes | Bubbled like sugar | Once salt water was added | Turned soapy white and thick | Equation: METHOD 1) Put 2 cm3 of castor oil into a 250 cm3 beaker and add 10 cm3 of 5mol.dm-3 sodium hydroxide from a measuring cylinder. (Take care when measuring this out and adding it to the beaker to avoid any drips and spills.) 2) Heat the mixture gently over a tripod and gauze, STIRRING CONSTANTLY with a glass rod (otherwise the mixture erupts). Allow to simmer (boil gently) for 5 minutes. Steady the beaker using
The Loss and then Retrieval of Copper through Multiple Reactions Lab Partners: Justin Dunn and Alexis Almaguer Experiment #2 Section: 506 Intro: All science occurs within rules. One very important rule is that matter can neither be created nor destroyed and this rule will be expressed and proven in this lab by removing copper and then regaining it through multiple reactions, heating, and stirring. This experiment allows the students to learn the different types of reactions as well as learn new techniques within the laboratory such as vacuum filtration and handling hot glassware, but most importantly proves the law of conservation of mass. Materials and Methods: to begin the experiment a 50 ml beaker, hot plate, plastic funnel, aspirator,