A Chemistry student has to prepare 155 mL of 0.100 M KI in water. She finds a bottle that states it is 10.00% KI in water and has a density of 1.07 g/mL. She takes 1.55 mL of the 10.00 % solution and dilutes it to a final volume of 155 mL. Support your answers with correct calculations. a) What is the concentration of the solution he prepared? b) If she did not prepare the solution correctly, what should she have done? c) Suppose what she needed to prepare was a solution that was 155 mL of 0.100% in KI. Would taking 1.55 mL of the 10.00% KI solution and diluting to 155 mL have worked? Why not?
A Chemistry student has to prepare 155 mL of 0.100 M KI in water. She finds a bottle that states it is 10.00% KI in water and has a density of 1.07 g/mL. She takes 1.55 mL of the 10.00 % solution and dilutes it to a final volume of 155 mL. Support your answers with correct calculations. a) What is the concentration of the solution he prepared? b) If she did not prepare the solution correctly, what should she have done? c) Suppose what she needed to prepare was a solution that was 155 mL of 0.100% in KI. Would taking 1.55 mL of the 10.00% KI solution and diluting to 155 mL have worked? Why not?
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter3: Mass Relations In Chemistry; Stoichiometry
Section: Chapter Questions
Problem 23QAP
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A Chemistry student has to prepare 155 mL of 0.100 M KI in water. She finds a bottle that states it is 10.00% KI in water and has a density of 1.07 g/mL. She takes 1.55 mL of the 10.00 % solution and dilutes it to a final volume of 155 mL. Support your answers with correct calculations.
a) What is the concentration of the solution he prepared?
b) If she did not prepare the solution correctly, what should she have done?
c) Suppose what she needed to prepare was a solution that was 155 mL of 0.100% in KI. Would taking 1.55 mL of the 10.00% KI solution and diluting to 155 mL have worked? Why not?
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