Describe how we would make the following solutions: (a) 500.0 mL of a 5.32% w/w H,S solution in water (b) 342.0 mL of a 0.443% w/w benzene solution in toluene (c) 12.5 mL of a 34.2% w/w dimethyl sulfoxide solution in acetone
Describe how we would make the following solutions: (a) 500.0 mL of a 5.32% w/w H,S solution in water (b) 342.0 mL of a 0.443% w/w benzene solution in toluene (c) 12.5 mL of a 34.2% w/w dimethyl sulfoxide solution in acetone
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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![## Solution Preparation Guide
**20. Describe how we would make the following solutions:**
### (a) 500.0 mL of a 5.32% w/w H₂S solution in water
To prepare this solution, calculate the mass of H₂S needed using the formula:
\[ \text{Mass of H}_2\text{S} = \left(\frac{5.32}{100}\right) \times \text{total mass of solution} \]
Determine the mass of the water required and mix with the calculated mass of H₂S to achieve the desired concentration.
### (b) 342.0 mL of a 0.443% w/w benzene solution in toluene
To create this solution, perform the following calculation for benzene:
\[ \text{Mass of benzene} = \left(\frac{0.443}{100}\right) \times \text{total mass of solution} \]
Combine the calculated mass of benzene with the appropriate volume of toluene to reach the specified w/w percentage.
### (c) 12.5 mL of a 34.2% w/w dimethyl sulfoxide solution in acetone
For this solution, calculate the required mass of dimethyl sulfoxide:
\[ \text{Mass of dimethyl sulfoxide} = \left(\frac{34.2}{100}\right) \times \text{total mass of solution} \]
Mix this mass with acetone to ensure the solution reaches the target concentration.
**Note:** Ensure to take into account the density of the liquids involved to convert between volume and mass if necessary. Use precise measuring equipment for accurate solution preparation.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fb2e29610-d8db-4968-9743-89351c891936%2F73e5c065-cc24-425c-887e-fb8f09a1f069%2F98d9ij_processed.jpeg&w=3840&q=75)
Transcribed Image Text:## Solution Preparation Guide
**20. Describe how we would make the following solutions:**
### (a) 500.0 mL of a 5.32% w/w H₂S solution in water
To prepare this solution, calculate the mass of H₂S needed using the formula:
\[ \text{Mass of H}_2\text{S} = \left(\frac{5.32}{100}\right) \times \text{total mass of solution} \]
Determine the mass of the water required and mix with the calculated mass of H₂S to achieve the desired concentration.
### (b) 342.0 mL of a 0.443% w/w benzene solution in toluene
To create this solution, perform the following calculation for benzene:
\[ \text{Mass of benzene} = \left(\frac{0.443}{100}\right) \times \text{total mass of solution} \]
Combine the calculated mass of benzene with the appropriate volume of toluene to reach the specified w/w percentage.
### (c) 12.5 mL of a 34.2% w/w dimethyl sulfoxide solution in acetone
For this solution, calculate the required mass of dimethyl sulfoxide:
\[ \text{Mass of dimethyl sulfoxide} = \left(\frac{34.2}{100}\right) \times \text{total mass of solution} \]
Mix this mass with acetone to ensure the solution reaches the target concentration.
**Note:** Ensure to take into account the density of the liquids involved to convert between volume and mass if necessary. Use precise measuring equipment for accurate solution preparation.
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