Fundamentals Of Analytical Chemistry
Fundamentals Of Analytical Chemistry
9th Edition
ISBN: 9781285640686
Author: Skoog
Publisher: Cengage
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7) An aqueous solution containing 25.0 mg of a hormone in 150.0 mL of solution with an osmotic pressure at 25 °C of 9.00 mmHg. What is the molecular weight of the hormone? 8) (a) What is the pH of a solution in which 45 mL of 0.10 M sodium hydroxide is added to 25mL of 0.15M hydrochloric acid? (b) A brand of carbonated beverage has a pH of 3.50. Calculate [H*]=?
(a) Calculate the acetate ion concentration in a solution prepared by dissolving 8.70×10-3 mol of HCl(g) in 1.00 L of 1.10 M aqueous acetic acid (Ka = 1.80×10-5). (b) Calculate the pH of the above solution. Give your answer to two decimal places.
1) Describe how you would prepare a 500.00 mL portion of 0.25M calcium hydroxide solution starting with solid calcium hydroxide. (b) What is the pH of the solution? 2) Acetone has a vapor pressure of 183.0 mm Hg at 40 °C and a heat of vaporization of 30.8 kJ/mol. What is the vapor pressure of acetone at 25 °C? 3) (a) Calculate the molality (m) of a solution containing 75.0 gm of glycol (C2H&O2) in 250.0 gm of water. (b) What is the mass percent of glycol in this solution?
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