**Determining the Concentration of a Sodium Thiosulfate Solution**A chemistry student must record the concentration of a solution of sodium thiosulfate in her lab notebook. The concentration is calculated by dividing the mass of the dissolved substance by the total volume of the solution. **Procedure:**1. **Measuring Apparatus:** - The label on the graduated cylinder reads: *empty weight: 6.0 g*2. **Preparation Steps:** - Sodium thiosulfate was placed in the graduated cylinder, and the combined weight was measured at 94.86 g. - Water was added to the cylinder, dissolving the sodium thiosulfate completely. - The total volume of the solution measured 122.28 mL.**Calculation:**To determine the concentration, the mass of the sodium thiosulfate is calculated by subtracting the empty weight of the cylinder from the total weight:\[ \text{Mass of sodium thiosulfate} = 94.86 \, \text{g} - 6.0 \, \text{g} = 88.86 \, \text{g} \]The concentration, with the correct number of significant figures, is determined by dividing the mass by the volume:\[ \text{Concentration} = \frac{88.86 \, \text{g}}{122.28 \, \text{mL}} \]**Result:**The concentration should be recorded as \( \boxed{0.727} \, \text{g/mL} \).**Visual Summary:**- **Box Diagram:** Illustrates the calculation area where the result of the concentration is entered.- **Calculation Tip:** Use of significant figures is crucial for accuracy in scientific measurements.

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A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. 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: 6.0 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 94.86 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 122.28 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. 1 8.mL-¹ 0 X

A chemistry student must write down in her lab notebook the concentration of a solution of sodium thiosulfate. 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: 6.0 g • She put some solid sodium thiosulfate into the graduated cylinder and weighed it. With the sodium thiosulfate added, the cylinder weighed 94.86 g. • She added water to the graduated cylinder and dissolved the sodium thiosulfate completely. Then she read the total volume of the solution from the markings on the graduated cylinder. The total volume of the solution was 122.28 mL. What concentration should the student write down in her lab notebook? Be sure your answer has the correct number of significant digits. 1 8.mL-¹ 0 X

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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