A 150.0 ml sample of ethylamine has a pH of 11.55. K-4.3x10-5 [H₂p]. (a) What is the concentration of hydroxide ion present in the solution before titration? 2.81x10 = [H₂0] X (b) What is the initial molar concentration of the ethylamine solution? (c) The 150.0 mL sample is titrated with hydrochloric acid. The equivalence point is reached after 37.50 mL of the HCI solution is added. What is the concentration of the HCI solution? E₂H5NH₂ +H₂O →→→ CzHs NH3 + OH

A 150.0 ml sample of ethylamine has a pH of 11.55. K-4.3x10-5 [H₂p]. (a) What is the concentration of hydroxide ion present in the solution before titration? 2.81x10 = [H₂0] X (b) What is the initial molar concentration of the ethylamine solution? (c) The 150.0 mL sample is titrated with hydrochloric acid. The equivalence point is reached after 37.50 mL of the HCI solution is added. What is the concentration of the HCI solution? E₂H5NH₂ +H₂O →→→ CzHs NH3 + OH

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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Question

19) A 150.0 ml sample of ethylamine has a pH of 11.55. Kb=4.3X10¹5
[H₂8].
(a) What is the concentration of hydroxide ion present in the solution before titration?
[H30] X
(b) What is the initial molar concentration of the ethylamine solution?
2.81x10
(c) The 150.0 mL sample is titrated with hydrochloric acid. The equivalence point is
reached after 37.50 mL of the HCI solution is added. What is the concentration of the
HCI solution?
C₂H5NH₂ +H₂O →→→ CzHs NH3 + OH
(d) Sketch a titration curve for (c) and clearly label all important points on the curve.

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