1-3: A stock solution of 70% v/v ethanol was diluted with distilled water to prepare 1L of 21% v/v ethanol. (Density of ethanol =0.789 g/mL; MW of ethanol = 46 g/mol)1.Determine the initial volume of 70% v/v ethanol used in the preparation.2.How much water was added to the stock solution to make 1L of the final concentration?3.The molarity of 5.0 mL of 70% v/v ethanol was found to be4-6: A solution contains 45.0 g of methanol, CH3OH, dissolved in sufficient water to give a total mass of 210.6 g.4. Compute for the number of moles of the solute present in the given solution.5. What is the mass (in kg) of water used to dissolve the solute from the given problem?6. Determine the molal concentration of the said solution.5-7: A 10.34 molal aqueous nitric acid solution was prepared.(Density of nitric acid = 1.51 g/mL, density of water = 1.0 g/mL, and the MW of nitric acid = 63 g/mol)5. How many grams of HNO3 were used to prepare the solution?6. What is the Molarity of the solution?7. What is the concentration (%"/,) of the solution?

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1-3: A stock solution of 70% v/v ethanol was diluted with distilled water to prepare 1L of 21% v/v ethanol. (Density of ethanol = 0.789 g/mL; MW of ethanol = 46 g/mol) 1. Determine the initial volume of 70% v/v ethanol used in the preparation. 2. How much water was added to the stock solution to make IL of the final concentration? 3. The molarity of 5.0 mL of 70% v/v ethanol was found to be

1-3: A stock solution of 70% v/v ethanol was diluted with distilled water to prepare 1L of 21% v/v ethanol. (Density of ethanol = 0.789 g/mL; MW of ethanol = 46 g/mol) 1. Determine the initial volume of 70% v/v ethanol used in the preparation. 2. How much water was added to the stock solution to make IL of the final concentration? 3. The molarity of 5.0 mL of 70% v/v ethanol was found to be

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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Question

1-3: A stock solution of 70% v/v ethanol was diluted with distilled water to prepare 1L of 21% v/v ethanol. (Density of ethanol =
0.789 g/mL; MW of ethanol = 46 g/mol)
1.
Determine the initial volume of 70% v/v ethanol used in the preparation.
2.
How much water was added to the stock solution to make 1L of the final concentration?
3.
The molarity of 5.0 mL of 70% v/v ethanol was found to be
4-6: A solution contains 45.0 g of methanol, CH3OH, dissolved in sufficient water to give a total mass of 210.6 g.
4. Compute for the number of moles of the solute present in the given solution.
5. What is the mass (in kg) of water used to dissolve the solute from the given problem?
6. Determine the molal concentration of the said solution.
5-7: A 10.34 molal aqueous nitric acid solution was prepared.
(Density of nitric acid = 1.51 g/mL, density of water = 1.0 g/mL, and the MW of nitric acid = 63 g/mol)
5. How many grams of HNO3 were used to prepare the solution?
6. What is the Molarity of the solution?
7. What is the concentration (%"/,) of the solution?

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