Calculations: Calculate the moles of each reactant. Note that the hydrobromic acid and hydrogen peroxide solutions are provided as concentrated aqueous solutions. The hydrobromic acid solution is 48% HBr by mass and the density of the solution is 1.49 g/mL. The hydrogen peroxide solution is 30% H2O2 by mass and the density of the solution is 1.11 g/mL. For each of these reactants, use the density to calculate the mass of solution and use the percent by mass to calculate the mass of solute (HBr or H2O2), before using the molar mass to calculate moles. Determine the limiting reactant and calculate the percentage yield. Show the calculations (these may be hand written or generated using the equation editor). Summarize the information in the reaction table (see next page). Page 11 of 19 CHEMISTRY 2400 EXPERIMENT 7: BROMINATION OF CINNAMIC ACID WINTER 2022 "product" Hydrobromic acid compound Cinnamic acid Hydrogen peroxide Stoichiometric coefficient Molar mass Density N/A N/A (if applicable) Concentration or N/A N/A percent composition (if applicable) Volume used (if N/A N/A applicable) mass of solution N/A N/A Mass of solute moles used N/A moles N/A x (ratio of stoich. coefficients)** Identify Limiting Reagent N/A

Calculations: Calculate the moles of each reactant. Note that the hydrobromic acid and hydrogen peroxide solutions are provided as concentrated aqueous solutions. The hydrobromic acid solution is 48% HBr by mass and the density of the solution is 1.49 g/mL. The hydrogen peroxide solution is 30% H2O2 by mass and the density of the solution is 1.11 g/mL. For each of these reactants, use the density to calculate the mass of solution and use the percent by mass to calculate the mass of solute (HBr or H2O2), before using the molar mass to calculate moles. Determine the limiting reactant and calculate the percentage yield. Show the calculations (these may be hand written or generated using the equation editor). Summarize the information in the reaction table (see next page). Page 11 of 19 CHEMISTRY 2400 EXPERIMENT 7: BROMINATION OF CINNAMIC ACID WINTER 2022 "product" Hydrobromic acid compound Cinnamic acid Hydrogen peroxide Stoichiometric coefficient Molar mass Density N/A N/A (if applicable) Concentration or N/A N/A percent composition (if applicable) Volume used (if N/A N/A applicable) mass of solution N/A N/A Mass of solute moles used N/A moles N/A x (ratio of stoich. coefficients)** Identify Limiting Reagent N/A

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter15: Acid–base Equilibria

Section: Chapter Questions

Problem 98AP

See similar textbooks

Similar questions

You want to prepare a 1.0 mol/kg solution of ethyleneglycol, C2H4(OH)2, in water. Calculate the mass of ethylene glycol you would need to mix with 950. g water.
What mass of solid NaOH (97.0% NaOH by mass) is required to prepare 1.00 L of a 10.0% solution of NaOH by mass? The density of the 10.0% solution is 1.109 g/mL.
Ethanol, C2H5OH, is a gasoline additive that can be produced by fermentation of glucose. C6H12O62C2H5OH+2CO2 (a) Calculate the mass (g) of ethanol produced by the fermentation of 1.000 lb glucose. (b) Gasohol is a mixture of 10.00 mL ethanol per 90.00 mL gasoline. Calculate the mass (in g) of glucose required to produce the ethanol in 1.00 gal gasohol. Density of ethanol = 0.785 g/mL. (c) By 2022, the U. S. Energy Independence and Security Act calls for annual production of 3.6 1010 gal of ethanol, no more than 40% of it produced by fermentation of corn. Fermentation of 1 ton (2.2 103 lb) of corn yields approximately 106 gal of ethanol. The average corn yield in the United States is about 2.1 105 lb per 1.0 105 m2. Calculate the acreage (in m2) required to raise corn solely for ethanol production in 2022 in the United States.
Polychlorinated biphenyls (PCBs) have been used extensively as dielectric materials in electrical transformers. Because PCBs have been shown to be potentially harmful, analysis for their presence in the environment has become very important. PCBs are manufactured according to the following generic reaction: C12H10+nCl2C12H10nCln.+nHCl This reaction results in a mixture of PCB products. The mixture is analyzed by decomposing the PCBs and then precipitating the resulting Cl asAgCl. a. Develop a general equation that relates the average value of n to the mass of a given mixture of PCBs and the mass of AgCl produced. b. A 0.1947-g sample of a commercial PCB yielded 0.4791 g of AgCl. What is the average value of n for this sample?
39. Standard solutions of calcium ion used to test for water hardness are prepared by dissolving pure calcium carbonate. CaCO3, in dilute hydrochloric acid. A 1.745-g sample of CaCO3 is placed in a 250.O-mL volumetric flask and dissolved in HCI. Then the solution is diluted to the calibration mark of the volumetric flask. Calculate the resulting molarity of calcium ion.
When 10. L of water is added to 3.0 L of 6.0 M H2SO4, what is the molarity of the resulting solution? Assume the volumes are additive.
Twenty-five mL of a 0.388 M solution of Na2SO4 is mixed with 35.3 mL of 0.229 M Na2SO4. What is the molarity of the resulting solution? Assume that the volumes are additive.
Magnesium metal (a component of alloys used in aircraft and a reducing agent used in the production of uranium, titanium, and other active metals) is isolated from sea water by the following sequence of reactions: Mg2+(aq)+Ca(OH)2(aq)Mg(OH)2(s)+Ca2+(aq)Mg(OH)2(s)+2HCl(aq)MgCl2(s)+2H2O(l)MgCl2(l)electrolysisMg(s)+Cl2+Cl2(g) Sea water has a density of 1.026 g/cm3 and contains 1272 parts per million of magnesium a5 Mg2+(aq) by mass. What mass, in kilograms, of Ca(OH)2; is required to precipitate 99.9% of the magnesium in 1.00103 L of sea water?
What is the difference between a solute and a solvent?
94. Baking soda (sodium hydrogen carbonate. NaHCO3) is often used to neutralize spills of acids on the benchtop in the laboratory. What mass of NaHCO3 would be needed to neutralize a spill consisting of 25.2 mL of 6.01 M hydrochloric acid solution?
A student weighs out a 4.80-g sample of aluminum bromide, transfers it to a 100-mL volumetric flask, adds enough water to dissolve it, and then adds water to the 100-mL mark. What is the molarity of aluminum bromide in the resulting solution?
Carbon dioxide from the atmosphere weathers, or dissolves, limestone (CaCO3) by the reaction CaCO3(s)+CO2(g)+H2O(l)Ca2(aq)+2HCO3(aq) Obtain H for this reaction. See Table 6.2 for the data.