May I get some help for #2 Challenge problems1) A 25.00 mL sample of unknown concentration of HNO3 solution requires 22.62 mL of0.02000 M NaOH to reach the equivalence point. What is the concentration of theunknown HNO3 solution?2) A 15.0 mL sample of 1.78 x 10-3 M Ca(OH)2 is being titrated against 2.18 x 10*M HCl. Determine the volume of HCl needed to reach the equivalence point.3) A 30.00 mL sample of unknown concentration of H3PO4 solution is titrated with0.100 M Ba(OH)2 solution. The equivalence point is reached when 26.38 mL ofBa(OH)2 solution is added. What is the concentration of the unknown H3PO4solution?4) A 35.0 mL sample of 1.78 x 10² M H2C2O4 is being titrated against 2.18 x 102 MHBr. Determine the volume of HBr needed to reach the equivalence point.5) Acetylsalicylic acid (HC,H;O4) is a monoprotic acid commonly known as"aspirin". A typical aspirin tablet, however, contains only a small amount of theacid. In an experiment to determine its composition, an aspirin tablet was crushedand dissolved in water. It took 12.25 mL of 0.1466 M NaOH to neutralize thesolution. Calculate the number of grains of aspirin in the tablet (one grain0.0648 g). (assume acid:base ratio is 1:1).

Answered: Image /qna-images/answer/f0a97608-7404-43d2-9cf3-684f9f78607e.jpg

Answered: 2) A 15.0 mL sample of 1.78 x 10-3 M…

2) A 15.0 mL sample of 1.78 x 10-3 M Ca(OH)2 is being titrated against 2.18 x 103 M HCl. Determine the volume of HCl needed to reach the equivalence point.

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

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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