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### zinc iodide lab report answers

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. Guide solution into the beaker with the glass stirring rod (so that it doesn’t run down the, side of the flask) *still under fume hood*. 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. 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 &.

A: Elements are those which available in single same state which do not combine with other atoms. ÷! E F ë ì í î t

your lab report, you will use Excel to calculate the average mole ratio and the empirical formula of zinc oxide from the class data.

while trying to prove the conservation of mass. € € Ã Ã Ã Ã Ã ÿÿÿÿ × × × × ã × ƒ ø ÷ ÷ ÷ ÷ ÷ Ò Ò Ò \$ { ¢ ! • View Available Hint(s) lead. E F p   ì î C Lab7-Determination of Chemical Formula Zinc Iodide.pdf, University of Texas, San Antonio • CHE 3643, Expt 2. Would this cause the calculated mass ratio, g I/g Zn, to be higher or lower than the value predicted? Swirl flask contents for 15-20 min. 1s This is a lab question, referring to zinc and iodine reacting to form zinc iodide.

Step-by-step answers are written by subject experts who are available 24/7. 2. lithium 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. Ã † h Ò Ò N Ò Ò Ò Ò Ò ( ( . S T V Ê â ÷ - 1 4 P Q ñ ‚ ¦ ô ö óïëçëïãßãßãÛã×ïÓ×ÓÏÇ¿Ï»ÏÓ×Ó³¯ÓÏÓ« hMy; h>… hÄ³ hÄ³ H*hœ/u h´*… hƒ  >*hœ/u hƒ  >*hƒ  hÄ³ hİ hDu¢ h¿>C hm14 h`Rİ h÷q h‚_ h‚_ h‚_ >*CJ aJ ! I think higher, am I correct? You can use the “Writing a Formal Lab Report” handout to remind you of the expectations for each section and the overall format. 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. Place unreacted zinc in flask back on the hot plate to dry, 18. Ú ( Ã Ò Ò Ò Ò Ò ( Ã Ã ÷ ÷ Û = N N N Ò Ã ÷ Ã ÷ N Ò N N V Â @ † ÷ ÿÿÿÿ nğæÉ × è 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. Mass of 3. Explain why or why not. DO NOT POUR OUT THE SOLID ZINC, 15. † ÷! a. To find the empirical formula, Zinc metal with elemental Iodine will need to be reacted to create the compound of Zinc Iodide. Full Ionic Equation: molec... Q: How would you account for the following? \

7s. The percent yields were as follows; Iodine 68.5% and Zinc 52.9%. c. Net Ionic Equation: what elements are present)? u 8x10 antimony atoms Calculate the mass of iodine and zinc reacted and produced along with mass and mole. Questions are typically answered in as fast as 30 minutes. 5p How well do your results agree with the Law of Conservation of Mass (use percent difference to compare)? Conclusion: Discuss 2 possible sources of error. Ò Ò Ò ƒ Ò Ò Ò Ò ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÿÿÿÿ ÷! Therefo... Q: Give logical fragmentation reactions to account for the following ions observed in these mass spectr... Q: NaHCO3(aq) + AgNO3(aq)

î S 0 ƒ x ÷! 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. sulfur *, Q: Which of the following is not an element? Remove from hot plate when done (will be hot), 14.

Add 5 mL of methanol and swirl for 15 seconds, allow zinc to settle then pour off, 16. From the data, it is possible to calculate the masses of zinc and iodine reacted as well as the mass of zinc iodide produced.

8 q ¬ S T U V ˜ ™ ö ÷ ñ = ÷ ò ò ò ò ò ò ò è è İ è è Õ Õ Õ Õ Ğ Ğ Ğ Å Å

Repeat step 15 a total of three times, 17. Also, remember to summarize important data in a table and show two example calculations (one in words and one with numbers) within your formal report.

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!

Full Molecular Equation:

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.

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