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1. Calculate the formula weights of the following substances: (a) BaCl, (b) KHC,0,

1. Calculate the formula weights of the following substances: (a) BaCl, (b) KHC,0,

Chemistry
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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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1. Calculate the formula weights of the following substances: (a) BaCl, (b) KHC,0, 2. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a) BaCro, (b) 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.
Transcribed Image Text:1. Calculate the formula weights of the following substances: (a) BaCl, (b) KHC,0, 2. Calculate the number of millimoles contained in 500 mg of each of the following substances: (a) BaCro, (b) 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.
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