Platinum is a precious metal that is used as a catalyst for many important industrial reactions. Platinum can be purified by reacting platinum(IV) bromide solution with aluminium metal. To test this purification process, a student reacted 14.6 kg of aluminium metal with excess platinum(IV) bromide solution. After the reaction was complete, the student had extracted 75.4 kg of platinum metal. From this data, calculate the percent error of this experiment. Hint: Write a balanced chemical reaction equation and calculate the theoretical yield of platinum first. Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units. Answer: Evaluate your calculated percent error, is this an acceptable percent error?

Platinum is a precious metal that is used as a catalyst for many important industrial reactions. Platinum can be purified by reacting platinum(IV) bromide solution with aluminium metal. To test this purification process, a student reacted 14.6 kg of aluminium metal with excess platinum(IV) bromide solution. After the reaction was complete, the student had extracted 75.4 kg of platinum metal. From this data, calculate the percent error of this experiment. Hint: Write a balanced chemical reaction equation and calculate the theoretical yield of platinum first. Do not show your work in the space provided. Record only your final answer with the correct number of significant digits and the proper units. Answer: Evaluate your calculated percent error, is this an acceptable percent error?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter3: Stoichiometry

Section: Chapter Questions

Problem 181CP

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The present average concentration (mass percent) of magnesium ions in seawater is 0.13%. A chemistry textbook estimates that if 1.00 × 108 tons Mg were taken out of the sea each year, it would take one million years for the Mg concentration to drop to 0.12%. Do sufficient calculations to either verify or refute this statement. Assume that Earth is a sphere with a diameter of 8000 mi, 67% of which is covered by oceans to a depth of 1 mi, and that no Mg is washed back into the oceans at any time.
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1. In 305 A.D. Archimedes was summoned before the king of Sicily to investigate a problem. The king had hired a smith to create a crown for him. The king provided the smith with exactly enough gold to create the crown, however when it was delivered the king was convinced that the smith had cheated him out of some gold by mixing it with another metal. The king tasked Archimedes with determining if the smith had delivered on his promise. 1. To test the authenticity of the crown Archimedes first needed to know the density of pure gold. He asked the king for a cube made of pure gold. From this cube Archimedes derived the following data: Mass of cube 160.8 g Length of side 2cm What is the density of pure gold, based off Archimedes data? Remember 1cm³ is 1ml Based on this density, the crown with a mass of 1.06 Kg, would occupy how many mL?
A powder company is hiring you as an intern researcher. Currently they are using a standard powder for their application and, according to the manufacturer specification, one sphere particle of 10 microns in radius has 2.03x1014 atoms A group of R&D engineers claim that the performance of the powder will improve only if there are four times the number of atoms in each 10-micron radius particle compared to the current standard powder, They proposed nickel (Ni) as an alternative material. It has the FCC crystal structure and atomic radius of 0.149 nm. They asked you to prove or disprove their claim. Assume a single perfect crystal in the particle for both the standard and the alternative materials. Hints: • This problem can be solved in two different ways, pick one (or try both to check your answer if you have time). You need to work on the alternative material, then compare the final value with the proposed claim. • (1) a particle is a sphere, (2) an atom is a sphere, (3) a unit cell is…
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To exomine the reock n rote of tem pero tu mn Q,+ Ca0 + CO2 » M2+ An experinment is corried Out in w hich the reoo tiN is ociunc. In the experiment tne frst test tube is Fm L 8x 104 M KMn Ou ond ImL 0.25M HesOyinto the secod test tube 4 mL 2,5x 10?M H2 204 is benp Put. When both test tubes ge broupht to thermol equilibrium both wth temperoture of in the Noter 25°C. The soluti on cotoining t2 CO is tronsferre d ether tost tube. Mhot the is the reocon fron the nonent of odd. Hon Stop uuo tch the う tエ de tected second c.The doke re oetion is repeotad Por us°C from this ex perimen t-Tobles The folowine question onswers, Os e piven. e ccordnp to this quote- Tem Pero tule ( time Isecoid 25 253 the effect of tomperature rate unhe the a. Exploin the reao t form lo ArrheninS

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