Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Calculate the analytical molar concentrations of trichloroacetic acid in an aqueous solution that contains 152.9 mg of trichloroacetic acid,Cl3CCOOH (163.4 g/mol), in 19.3 mL (the acid is 73% ionized in water). Indicate units
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Step 1
Analytical molar concentration of a solution refers to the initial number of moles of a solute in 1 L of the solution. So, it doesn't matter how much the reactant reacts to evaluate the analytical molar concentration.
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Step 2
Given:
Mass of solute (chloroacetic acid) in the solution = 152.9 mg = 152.9 X 10-3 g
Molar mass of solute = 163.4 g/mol
Volume of solution = 19.3 mL = 19.3 X 10-3 L
Thus, analytical molar concentration of the solution:
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