https://www-awu.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-li-alBG1hBjbQdonu9XtEDAhQGDsSwluxzbGCw3DMTAaNlfGgULOgOp... A Q ||| = O MEASUREMENT AND MATTER Adding or subtracting and multiplying or dividing measurements gmL A chemistry student must write down in her lab notebook the concentration of a solution of potassium chloride. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: . The label on the graduated cylinder says: empty weight: 1.05 g . She put some solid potassium chloride into the graduated cylinder and weighed it. With the potassium chloride added, the cylinder weighed 84.7 g. . She added water to the graduated cylinder and dissolved the potassium chloride completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 198.62 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. -1 Explanation Check X 0/3 S R Brinelle Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center Accessibility G de
https://www-awu.aleks.com/alekscgi/x/Isl.exe/10_u-IgNslkr7j8P3jH-li-alBG1hBjbQdonu9XtEDAhQGDsSwluxzbGCw3DMTAaNlfGgULOgOp... A Q ||| = O MEASUREMENT AND MATTER Adding or subtracting and multiplying or dividing measurements gmL A chemistry student must write down in her lab notebook the concentration of a solution of potassium chloride. The concentration of a solution equals the mass of what's dissolved divided by the total volume of the solution. Here's how the student prepared the solution: . The label on the graduated cylinder says: empty weight: 1.05 g . She put some solid potassium chloride into the graduated cylinder and weighed it. With the potassium chloride added, the cylinder weighed 84.7 g. . She added water to the graduated cylinder and dissolved the potassium chloride completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 198.62 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. -1 Explanation Check X 0/3 S R Brinelle Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center Accessibility G de
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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![**Educational Content: Measuring Concentrations of Solutions**
In this exercise, we explore how to determine the concentration of a potassium chloride solution. The concentration is defined as the mass of the dissolved solute divided by the total volume of the solution. Below is a step-by-step guide provided by a chemistry student on how this solution was prepared and measured:
1. **Initial Measurements:**
- The empty graduated cylinder is labeled with an empty weight of **1.05 g**.
2. **Adding the Solute:**
- Solid potassium chloride is placed into the graduated cylinder.
- The weight of the cylinder with the potassium chloride is **84.7 g**.
3. **Creating the Solution:**
- Water is added to the cylinder to completely dissolve the potassium chloride.
- The total volume of the resulting solution is read from the graduated cylinder as **198.62 mL**.
4. **Calculating Concentration:**
- To find the concentration, the student calculates the difference in mass to find the mass of the potassium chloride:
\[
\text{Mass of potassium chloride} = 84.7 \, \text{g} - 1.05 \, \text{g}
\]
- The concentration is then determined by dividing this mass by the total volume of the solution:
\[
\text{Concentration (g/mL)} = \frac{\text{Mass of potassium chloride (g)}}{\text{Total volume (mL)}}
\]
**Considerations:**
- The final answer must reflect the appropriate number of significant digits based on the measurements provided.
This understanding helps in accurately recording and analyzing the concentration of solutions in laboratory settings.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F119fd9ee-0d86-405f-8fbb-1cd17cdf6dea%2F06a2bf5f-45da-461f-9b4d-7598655b545d%2Fuc6823_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Educational Content: Measuring Concentrations of Solutions**
In this exercise, we explore how to determine the concentration of a potassium chloride solution. The concentration is defined as the mass of the dissolved solute divided by the total volume of the solution. Below is a step-by-step guide provided by a chemistry student on how this solution was prepared and measured:
1. **Initial Measurements:**
- The empty graduated cylinder is labeled with an empty weight of **1.05 g**.
2. **Adding the Solute:**
- Solid potassium chloride is placed into the graduated cylinder.
- The weight of the cylinder with the potassium chloride is **84.7 g**.
3. **Creating the Solution:**
- Water is added to the cylinder to completely dissolve the potassium chloride.
- The total volume of the resulting solution is read from the graduated cylinder as **198.62 mL**.
4. **Calculating Concentration:**
- To find the concentration, the student calculates the difference in mass to find the mass of the potassium chloride:
\[
\text{Mass of potassium chloride} = 84.7 \, \text{g} - 1.05 \, \text{g}
\]
- The concentration is then determined by dividing this mass by the total volume of the solution:
\[
\text{Concentration (g/mL)} = \frac{\text{Mass of potassium chloride (g)}}{\text{Total volume (mL)}}
\]
**Considerations:**
- The final answer must reflect the appropriate number of significant digits based on the measurements provided.
This understanding helps in accurately recording and analyzing the concentration of solutions in laboratory settings.
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