a) We have 500.0 mL of an aqueous solution of CaCl2 (CaCl2 is a strong electrolyte, molar mass = 110.98 g/mol). We add excess AgNO3 to produce AgCl(s) as precipitate (AgCl molar mass = 143.32 g/mol). The mass of AgCl produced is 2,222 g. What is the initial concentration of CaCl2? b) HA is a weak acid with an ionization constant, Ka, of 5.0 × 10−5. We have 1.00 L of a buffer solution composed of 0.377 M in HA and 0.455 M in NaA. To this buffer solution we add 0.1000 mol of NaOH (the volume is not affected). What was the initial pH of the solution before adding NaOH? What is the pH of the solution after adding NaOH? The temperature is 25.0◦C.
a) We have 500.0 mL of an aqueous solution of CaCl2 (CaCl2 is a strong electrolyte, molar mass = 110.98 g/mol). We add excess AgNO3 to produce AgCl(s) as precipitate (AgCl molar mass = 143.32 g/mol). The mass of AgCl produced is 2,222 g. What is the initial concentration of CaCl2? b) HA is a weak acid with an ionization constant, Ka, of 5.0 × 10−5. We have 1.00 L of a buffer solution composed of 0.377 M in HA and 0.455 M in NaA. To this buffer solution we add 0.1000 mol of NaOH (the volume is not affected). What was the initial pH of the solution before adding NaOH? What is the pH of the solution after adding NaOH? The temperature is 25.0◦C.
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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a) We have 500.0 mL of an aqueous solution of CaCl2 (CaCl2 is a strong electrolyte, molar mass = 110.98 g/mol). We add excess AgNO3 to produce AgCl(s) as precipitate (AgCl molar mass = 143.32 g/mol). The mass of AgCl produced is 2,222 g. What is the initial concentration of CaCl2? b) HA is a weak acid with an ionization constant, Ka, of 5.0 × 10−5. We have 1.00 L of a buffer solution composed of 0.377 M in HA and 0.455 M in NaA. To this buffer solution we add 0.1000 mol of NaOH (the volume is not affected). What was the initial pH of the solution before adding NaOH? What is the pH of the solution after adding NaOH? The temperature is 25.0◦C.
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