1. Data Part A. Preparation of Solutions 1. Preparation of Fe³+ solution a. Mass of iron(III) nonahydrate: b. Volume of water: c. Volume of 1.0 M nitric acid: 2. Preparation of
5-sulfosalycilic acid solution a. Mass of 5-sulfosalycilic acid dihydrate: b. Volume of water: Volume of 1.0 M nitric acid: C. 3. What are your observations of the two solutions water? when they are dissolved in When added water to Fest it turn the Solution to yellow. When added water to 5-sulfosalyCilic acic solution, it dissolved the Solution but water stayed clear. 4. What are your observations of the two solutions after nitric acid is added? Fe² it When added nitric acid to turn the solution frow yellow to clear. When added nitric acid to 5-sulfosaycilic acid Solution reaction accur. Molarity of Fe³+ mol = 0.1350g go mu 10 me no mass mal wt 0.12389 90 m² 10 ml 5. How many moles of iron (III) nitrate nonahydrate were measured? Show your work. = 0.135 g 403.86 g/mol/nExperiment 8 120 6. How many moles of nitrate ion are coming from the iron(III) nitrate nonahydrate solid? Show your work. I moL iran nanhydrate give 3 mol of nitrate MOL of nitrate= 3x 3.59 x 10-4 1.0028 x 10-3 mol 7. How many moles of nitrate ion are coming from the nitric acid? show your work. Vol of nitric acid= 10 mL =10x160-³L Mol of acid = Vol x conc = = 10x 10-3L = Conc of nitric acid = Im Vol XConc Imol = 10 - 2 mal mol of nitrate from acid = 0.01 mol 8. What is the molarity of the Fe³+ ion, in your final iron(III) nitrate solution? Show your work. = 3.34 x 10-4. 0.1 L = 33.4 x 104m V+= 100 mL GIL mol of Fe3= 3.34 x 10-4mol 34 Canc of Fe = mol vol 9. What is the molarity of the nitrate ion in your final iron(III) nitrate solution? Show your work. Nitrate is coming from iron nitrate as well as acid nitrate total in Solution = 1.0028 x Conc of nitrate = 0.011 = 0.011 0.1 = 0.11 m mol Molarity of SSA 10. How many moles of 5-sulfosalycilic acid dihydrate were measured? Show your work. mass of Solfasalycilic acid = 0.12389 mol wt 254.22 mol of acid = 01238 254.22 = -4 4.86 x 10 mal/n12. Concentrations of prepared solutions -1.65×10³³ M a. Fe(III) 13. % Transmittance of solutions Test Tube # 1 2 3 4 5 6 7 8 9 b. SSA-1X10M %T 58.0% 33.4% 23.0% 11.0% 7.600 %T = 23% 8.0%.c 15.0% 25.0% 56.8⁰0 14. What are your observations when the two solutions are mixed? The absorbance and Transmittance of the Solution Change. It also change the Concentration of the solution 15. Which test tube do you think has the most product, based on your observations? Based on my observation, Test tube #5 has maximum product A lower / Transmittance means that less light is possing through the solution. It indicates the higher concentration of absorling Calculations Species Show a sample calculation for solution for test tube 3. 16. Calculation of absorbance of solution in test tube 3. Absorbance, A= EC l = bg₁ ( =) (123) A= log₁0 10/nExperiment 8 122 17. Calculation of the moles of Fe³+ in test tube 3. moles= 1,052 x 10-39 55 845(91mai) int - 10 = 0.018 mmoles in IL Solution =0018 × 10 -3 mole = 0.0018 mmoles 18. Calculation of the molarity of Fe³+ in test tube 3. X = 1.052 x 10 -3 55.84 5 0.018x10-3m. x=0.018m M 19. Calculation of the moles of 5-sulfosalicylic acid in test tube 3. moles= 0.100 mg 2189/mo -0.0005 x10 - Smae Moles = 0.0005 mmoles in 100 ml solution 20. Calculation of the molarity of 5-sulfosalicylic acid in test tube 3. Concentration = 1.09 x 10-³gle Imolonity = 218 9/1 X molonity = 1.09 x 103 glu melanity=0.008 x 1³m 21. Calculation of mole fraction SSA in test tube 3. In 100 ml solution mole of fe(11)-0.0018 mimores Mole of SSA-0.0005 m Moles 0.0003 0.000s 0.0023 0.0018 = 0.217 = 0.0005 +00018 22. Calculation of mole fraction Fe(III) in test tube 3. Mole Fraction of Fe(111) -0.0018 6.000S+0.0018/n[Report Form continued Name III. Summary of Results Test Tube # Abs 1 2 3 4 5 6 7 8 9 Moles Fe³+ Section # Moles SSA A. Results from Graph of Absorbance vs. XSSA 23. The lines intersect at a mole fraction SSA of XSSA Attach your graph of absorbance versus mole fraction SSA. Show the intersection point of the two linear segments. Be sure to follow all the graphing procedures out- lined in the appendix of the laboratory manual. 24. The lines intersect at a mole fraction of Fe(III) of (Show your calculation) Xe 123/nExperiment 8 124 25. The ratio of moles SSA/moles Fe(III) in the product is (show your work): moles SSA/Fe(III) =_ 26. The formula of the product formed between SSA and iron (III) is:
