Part I: Lab Insert completed data tables for each part of the lab. Be sure that the data tables are organized and include units when necessary. Melting Point (4 points) White Substance- 600c (no melt) White Substance- 180c (melted) Blue Substance- 600c (changed color but didnt
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?
3) Write equations to indicate what you consider to have happened in each case in which there was precipitate formed. Use ions to represent the species in the reacting solutions, but for those products that were precipitates write a formula for the compound. Place (aq) after those species in solution and (s) after the precipitates. Be sure to write the equations so that both atoms and charge are conserved. For example: Ag+(aq) + NO3-(aq) + Na+(aq) + Cl-(aq) ( AgCl(s) + Na+(aq) + NO3-(aq) 4) Rewrite the equations, leaving out the ions not involved in the reaction (spectators).
Data * Below is the table that you will complete for the virtual lab. Either type your results into this table or print the table from the virtual lab (it must be submitted to receive full credit for this assignment. Part I: Density of Unknown Liquid | | Trial 1 | Trial 2 | Trial 3 | Mass of Empty 10 mL graduated cylinder (grams) | 25.31g | 25.40g | 26.03g | Volume of liquid (milliliters) | 8.12mL | 8.26mL | 8.52mL | Mass of graduated cylinder and liquid (grams) | 35.46g | 36.01g | 36.41g | Part II: Density of Irregular-Shaped Solid | Mass of solid (grams) | 42.313g | 40.65g | 40.95g | Volume of water (milliliters) | 48.95mL | 50.03mL | 50.05mL | Volume of water and solid (milliliters) | 53.91mL | 55.04mL | 550.04mL | Part III: Density of Regular-Shaped Solid | Mass of solid (grams) | 25.95g | 27.62g | 25.67g | Length of solid (centimeters) | 5.250cm | 5.0cm | 4.50cm | Width of solid (centimeters) | 3.0cm | 4.0cm | 3.50cm | Height of solid (centimeters) | 2.50cm | 3.0cm | 2.0cm | Calculations Show all of your work for each of the following calculations and be careful to follow significant figure rules in each calculation. Part I: Density of Unknown Liquid 1. Calculate the mass of the liquid for each trial.
Melting Points Lab Abstract: One of the physical properties most relied upon for compound identification is a compound’s melting point. This experiment gives the student an opportunity to explore how compounds can be identified with this physical indicator. The experiment uses two compounds, tetracosane (C24H50) and 1-tetradecanol (C14H30O). The experiment confirms through melting points that the compound with more carbons and no branches (C24H50) has a higher melting point than 1-tetradecanol. Hypothesis: Using melting points can help determine the difference in total carbon atoms and branches between two or more compounds.
Zinc ion and Iodine-iodide-triodide ion in water: It was a liquid solution in a bottle, it was very dark orange-brown color. Solid Zinc Iodide: A very white powdery substance that had several clumps within it. It was also very dry in nature. Mass Table Substance Amount of Mass Measured for Actual Mass Granular Zinc 2.0 grams 1.9 grams Iodine Crystals 2.0 grams 2.1 grams Observation of Reaction Shown below and Included within the lab notes on pages 12 and on page 14. Placing Acetic Acid in Zinc and Iodine test tube After placing the Acetic Acid in a normally unreactive test tube containing Zinc and Iodine, the solution changed to a more orange and then to a more red-brown color.
Contents Abstract – Page 2 Summary of Results – Page 3 Focus Question – Page 5,6 What if… - Page 6 Confidence Report – Page 7,8 Abstract Summary of Results Observations of Reactions – Trials 1 , 2 & 3 | Dissolving Barium Iodide and Zinc Sulfate in deionized water | As the substances dissolve the water becomes cloudy and acquired a white tint. | Centrifuging up the solution obtained in previous reaction | The precipitate and the liquid seperated, and there was more precipitate in one of the test tubes. The precipitate was a thick white color, not transparent. | Heating the Precipitate in a boiling tube containing 2 boiling chips | The mixture began producing a large amount of bubbles, as we continued heating it only white powder remained. | Observations of Chemicals | Zinc Sulfate | Powder of a white solid | Barium Iodide | Powder of a white solid.
Aqueous solutions (when the covalent compounds are dissolved in water)? No PART 1art I: Lab Insert completed data tables for each part of the lab. Be sure that the data tables are organized and include units when necessary. * Melting Point (4 points) Substance A—white powder, did not melt. Oven went up to 600°C.
Dry Lab 3 Report Sheet Atomic and Molecular Structure Date Lab Sec. Name Desk No. A. The Mercury Spectrum Instructor’s approval of the calibration of the color plate (back cover) B. The Spectra of Elements 1.
A) Pt B) P C) K D) S E) Ca 5) The symbol for the element magnesium is __________. A) Rb B) Mn C) Ne D) Si E) Mg 6) The initial or tentative explanation of an observation is called a(n) __________. A) law B) theory C) hypothesis D) experiment E) test 7) A concise verbal statement or mathematical equation that summarizes a broad variety of observations and experiences is called a(n) __________. A) law B) theory C) hypothesis D) experiment E) test 8) A separation process that depends on differing abilities of substances to form gases is called __________. A) filtration B) solvation C) distillation D) chromatography E) all of the above are correct 9) The SI unit for mass is __________.