5.00 g sodium metal reacts with excess sulfuric acid at 27°C and 110 kPa. 2 Na+ H₂SO4 → H₂+ Na₂SO4 a. Calculate the volume of the gas produced under these conditions. b. What would the volume of gas be if it were formed at a high-altitude laboratory where the temperature was 15°C and the atmospheric pressure only 85 kPa?

5.00 g sodium metal reacts with excess sulfuric acid at 27°C and 110 kPa. 2 Na+ H₂SO4 → H₂+ Na₂SO4 a. Calculate the volume of the gas produced under these conditions. b. What would the volume of gas be if it were formed at a high-altitude laboratory where the temperature was 15°C and the atmospheric pressure only 85 kPa?

Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter21: The Chemistry Of The Main Group Elements

Section: Chapter Questions

Problem 53PS

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To each digestion flask 200 mL aliquots of 10 different drinking water samples were added. Silver was extracted by a co-precipitation procedure and collected by filtration. The precipitate was digested in 200 μl hot concentrated nitric acid and diluted to 5 mL in a dilute phosphate solution. Standards were prepared according to the following table. The samples were analyzed by graphite furnace AAS. Calculate the concentration of silver in each sample. Are there any problems? How will you address each of the identified problems?
Why is there a need for 2 indicators in the analysis of mixed alkali? How do the two indicators help identify the components of mixed alkali samples?
A lump of sucrose of mass 10.0 g is suspended in the middle of a spherical flask of water of radius 10 cm at 25 °C. What is the concentration of sucrose at the wall of the flask after (a) 1.0 h, (b) 1.0 week. Take D = 5.22 × 10−10 m2 s−1.
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Following sodium fusion and fracture of the test tube into 15 mL of deionized water (in a 50 mL beaker), the next step is to ________. Add phenolphthalein indicator and perform a titration Filter the solution to remove insoluble material and glass fragments Perform the chemical test for formation of lead sulfide (PbS) Perform any of the three chemical tests for sulfur, nitrogen, or a halogen Discard the solution into the sink and clean the beaker
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CaO forms a solid solution with Bi2O3 to give a material with a high anionic conductivity. If 10 mole % CaO is reacted with 90 mol % Bi2O3; a) write the defect reaction for the addition of CaO in Bi2O3 b) what is the formula of the final solid;
A 1.1324 g sample of magnetite ore was dissolved in concentrated HCl to give a solution that contained a mixture of Fe2+ and Fe3+. Nitric acid was added and the solution was boiled for a few minutes, which converted all of the iron to Fe3+. The Fe3+ was then precipitated as Fe2O3*xH2O by addition of NH3. After filtration and washing, the residue was ignited at a high temp to give 0.5394 g of pure Fe2O3. What is the percent Fe and the percent Fe3O4 in the sample?

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