How well do your results agree with the Law of Conservation of Mass (use percent difference to compare)? Introduction: Describe how this experiment relates to any two of the following concepts: law of conservation of mass, ions, percent yield, limiting reagents, stoichiometry (reactant mass versus reactant moles), chemical reaction, oxidation states. This is a lab question, referring to zinc and iodine reacting to form zinc iodide. A: Elements are those which available in single same state which do not combine with other atoms. Synthesis of Zinc Iodide Jessica Edwards Chem 104 Section 30 Performed: 9/4/2007 Submitted: 9/11/2007 Abstract: The objective of the experiment was to determine the formula of zinc iodide and properly figure out the percent yield of zinc and iodine.
*While in fume hood* add 25 mL of methanol, Place on hot plate set temp low (pre warmed) (need to boil Methanol), 10. (i) The atomic radii of the metals of the third (5d) series... A: (i) ÷!
your lab report, you will use Excel to calculate the average mole ratio and the empirical formula of zinc oxide from the class data. b. DO NOT POUR OUT THE SOLID ZINC, 15. Zinc Iodide Reaction Lab.docx - 4 Determination of a Chemical Formula The Reaction of Iodine with Zinc(use THIS for the second trial in Hesss Law Lab, 5 out of 6 people found this document helpful, Purpose: The purpose of this lab is to determine the balanced chemical equation for the, formation of zinc iodide as well as the chemical formula of the compound from the mole ratio. Percent composition of Zn and I
% composition = (mass of element / mass compound) x 100%
Empirical formula of zinc iodide for your measured masses
What do the results of the decomposition of zinc iodide say about the composition of the solid product from part I of the experiment (i.e. E F ë ì í î t This preview shows page 1 - 2 out of 4 pages. Wh... Q: 1) Calculate how much 95% ethyl alcohol will be required to dissolve 0.75 g of Sulfanilamide at 78℃ ... A: From the graph, the solubility of sulfanilamide at 78◦C = 180 mg/ml Questions are typically answered in as fast as 30 minutes. Mass of 4.3x10mol of lead c. Net Ionic Equation: If these are missing you will lose points on your report! From the data, it is possible to calculate the masses of zinc and iodine reacted as well as the mass of zinc iodide produced.
Course Hero is not sponsored or endorsed by any college or university. Why or why not. O water This is a lab question, referring to zinc and iodine reacting to form zinc iodide. molec... Q: How would you account for the following? u Would this cause the calculated mass ratio, g I/g Zn, to be higher or lower than the value predicted? 1.
€ € Ã Ã Ã Ã Ã ÿÿÿÿ × × × × ã × ƒ ø ÷ ÷ ÷ ÷ ÷ Ò Ò Ò $ { ¢ ! INTRODUCTION TO ZINC: Zinc has its origin form the German word “Zin” which means Tin.Zinc is found in the group IIb in the periodic table.Zinc is a transition metal having a lustrous blue white appearance. Results: Do your measurements support the Law of Conservation of mass (use percent difference to compare)? X Lab7-Determination of Chemical Formula Zinc Iodide.pdf, University of Texas, San Antonio • CHE 3643, Expt 2. At the ordinary room temperature, the appearance of zinc is crystalline and brittle. Ò Ò Ò Ò Ò Ò Ò Ò Ò € ‰ : Synthesis and Decomposition of Zinc Iodide Formal Report Information
Be sure to look over your “Molar Mass of Magnesium” formal report and correct any style and content errors in this week’s formal report. Number of... Q: Which of the following is not a possible Orbital destination
N Full Molecular Equation: 4 Determination of a Chemical Formula The Reaction of Iodine with Zinc ((use THIS for the second trial in Hess’s Law Lab)) Purpose: The purpose of this lab is to determine the balanced chemical equation for the formation of zinc iodide as well as the chemical formula of the compound from the mole ratio while trying to prove the conservation of mass. Add 5 mL of methanol and swirl for 15 seconds, allow zinc to settle then pour off, 16. lead. S T V Ê â ÷ -
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8x10 antimony atoms Post-lab questions for Synthesis and Decomposition of Zinc Iodide
Be sure the answers to these questions appear in the appropriate section your formal report! Ã † h Ò Ò N Ò Ò Ò Ò Ò ( ( . 3f W If at the end of the reaction some of the unreacted zinc escaped from the evaporating dish, the mass of the dish plus the unreacted zinc would be lower than it should be. For a limited time, find answers and explanations to over 1.2 million textbook exercises for FREE! Calculate the mass of iodine and zinc reacted and produced along with mass and mole. ò . Therefo... Q: Give logical fragmentation reactions to account for the following ions observed in these mass spectr... Q: NaHCO3(aq) + AgNO3(aq) If at the end of the reaction some of the unreacted zinc escaped from the evaporating dish, the mass of the dish plus the unreacted zinc would be lower than it should be. † ÷! Swirl to dry remove from heat when it appears dry and let cool for 10 to 15 minutes, 19. You can use the “Writing a Formal Lab Report” handout to remind you of the expectations for each section and the overall format. 8 q ¬ S T U V ˜ ™ ö ÷ ñ
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1s Lab report: Empirical Formula of Zinc Iodide Rawan Elbadawy Chemistry 110 Laboratory Introduction A group of researchers were asked to find the empirical formula of Zinc Iodide. Median response time is 34 minutes and may be longer for new subjects. Swirl flask contents for 15-20 min. Mass of 3. Conclusion: Discuss 2 possible sources of error. 5p What errors might have led to any violation of the Law? Why or why not? • View Available Hint(s) a.
Full Ionic Equation: And the solubility of sulfanilam... Q: Calculate the following: 3. Determination of a chemical formula (zinc iodide) CHE145 Lab Notes & Prelab Assignment, University of Wisconsin Colleges • CHE 145. what elements are present)? Would this cause the calculated mass ratio, g I/g Zn, to be higher or lower than the value predicted? Post-lab questions for Synthesis and Decomposition of Zinc Iodide Be sure the answers to these questions appear in the appropriate section your formal report!
solution will be brown when done, 11.
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