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1. Calculate the formula weights of the following substances: (a) BaCI, (b) KHC,0, 2. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a) BaCro, () CHCI, (c) KIO, • HIO, 3. Calculate the number of grams of each of the substances in Problem 2 that would have to be dissolved and diluted to 100 mL to prepare a 0.200 M solution. in 250

1. Calculate the formula weights of the following substances: (a) BaCI, (b) KHC,0, 2. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a) BaCro, () CHCI, (c) KIO, • HIO, 3. Calculate the number of grams of each of the substances in Problem 2 that would have to be dissolved and diluted to 100 mL to prepare a 0.200 M solution. in 250

Chemistry: The Molecular Science
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter2: Chemical Compounds
Section: Chapter Questions
Problem 104QRT
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12 For the following problems please show your solutions and BOX your final answers expressed in the correct units. Upload PDF file of your answer. 1. Calculate the formula weights of the following substances: (a) BaCl, (b) KHC,O, 2. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a) BaCro, () CHCI, (c) KIO, • HIo, 3. Calculate the number of grams of each of the substances in Problem 2 that would have to be dissolved and diluted to 100 mL to prepare a 0.200 M solution. 4. Calculate the molarity of each of the following solutions: (a) 10.0 g H,SO, in 250 mL of solution (b) 6.00 g NaOH in 500 mL of solution (c) 25.0 g AgNO, in 1.00 L of solution 5. A 12.5 mL portion of a solution is diluted to 500 mL, and its molarity is determined to be 0.125. What is the molarity of the original solution? 6. How many milliliters of concentrated hydrochloric acid, 38% (wt/wt), specific gravity 1.19, are required to prepare 1 L of a 0.100 M solution? Assume density and specific gravity are equal within three significant figures. 7. A calcium concentration is reported as 300 mg/dL. What is the concentration in meq/L? 8. A 0.456-g sample of an ore is analyzed for chromium and found to contain 0.560 mg Cr.O,. Express the concentration of Cr,O, in the sample as (a) percent, (b) ppt. (c) ppm. W tv MacBook Air 山 ii
Transcribed Image Text:12 For the following problems please show your solutions and BOX your final answers expressed in the correct units. Upload PDF file of your answer. 1. Calculate the formula weights of the following substances: (a) BaCl, (b) KHC,O, 2. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a) BaCro, () CHCI, (c) KIO, • HIo, 3. Calculate the number of grams of each of the substances in Problem 2 that would have to be dissolved and diluted to 100 mL to prepare a 0.200 M solution. 4. Calculate the molarity of each of the following solutions: (a) 10.0 g H,SO, in 250 mL of solution (b) 6.00 g NaOH in 500 mL of solution (c) 25.0 g AgNO, in 1.00 L of solution 5. A 12.5 mL portion of a solution is diluted to 500 mL, and its molarity is determined to be 0.125. What is the molarity of the original solution? 6. How many milliliters of concentrated hydrochloric acid, 38% (wt/wt), specific gravity 1.19, are required to prepare 1 L of a 0.100 M solution? Assume density and specific gravity are equal within three significant figures. 7. A calcium concentration is reported as 300 mg/dL. What is the concentration in meq/L? 8. A 0.456-g sample of an ore is analyzed for chromium and found to contain 0.560 mg Cr.O,. Express the concentration of Cr,O, in the sample as (a) percent, (b) ppt. (c) ppm. W tv MacBook Air 山 ii
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