Trial 2 Trial 1 E. Molar Volume of CO, Gas Exbe 1. Pressure of dry CO,(g) (atm). See Part C.7. 2. Volume of CO,(g) at STP (L). See equation 13.4. 3. Molar volume of CO,(g) at STP (L/mol). See equation 13.2. 4. Average molar volume of CO,(g) at STP (L/mol)
Trial 2 Trial 1 E. Molar Volume of CO, Gas Exbe 1. Pressure of dry CO,(g) (atm). See Part C.7. 2. Volume of CO,(g) at STP (L). See equation 13.4. 3. Molar volume of CO,(g) at STP (L/mol). See equation 13.2. 4. Average molar volume of CO,(g) at STP (L/mol)
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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Need help with part E
Transcribed Image Text:**E. Molar Volume of CO₂ Gas**
1. Pressure of dry CO₂(g) (atm). See Part C.7.
2. Volume of CO₂(g) at STP (L). See equation 13.4.
3. Molar volume of CO₂(g) at STP (L/mol). See equation 13.2.
4. Average molar volume of CO₂(g) at STP (L/mol).
| | Trial 1 | Trial 2 |
|----------------|---------|---------|
| 1. | | |
| 2. | | |
| 3. | | |
| 4. | | |
**F. Percent CaCO₃ in Mixture**
1. Moles of CaCO₃ in sample from mol CO₂ generated (mol). See equation 13.1.
2. Mass of CaCO₃ in sample (g).
3. Mass of original sample (g).
4. Percent of CaCO₃ in sample (%).
5. Average percent of CaCO₃ in sample (%).
| | Trial 1 | Trial 2 |
|----------------|---------|---------|
| 1. | | |
| 2. | | |
| 3. | | |
| 4. | | |
| 5. | | |
**Laboratory Questions**
Circle the questions that have been assigned.
1. **Part A.1.** The water for the pan (Part A.3) is not saturated with CO₂. Will the reported percent CaCO₃ in the original sample be too high, too low, or unaffected? Explain.
2. **Part A.2.** Suppose 6 M HCl is substituted for the 3 M HCl in the procedure. What would be the consequence of this substitution? Explain.
3. **Part A.3.** A few drops of HCl(aq) spilled over into the CaCO₃ sample prior to firmly seating the stopper and before collecting any CO₂(g). As a result of this poor technique, will the reported percent CaCO₃ in the sample be too high, too low, or unaffected? Explain.
4. **Part A.4.** The rubber stopper has a small crack resulting in a not-tight seal
![**Transcription for Educational Use:**
**A. Sample Preparation and Setup Apparatus**
*Calculation of mass of \( \text{CaCO}_3 \) sample for analysis (from Prelaboratory Assignment, question 2).*
---
**Unknown sample no. __________**
**Trial 1** | **Trial 2**
1. **Mass of sample (g)**
0.6 | __________
2. **Mass of generator + sample before reaction (g)**
47.27 | __________
3. **Instructor’s approval of apparatus**
__________
**C. Determination of Volume, Temperature, and Pressure of the Carbon Dioxide Gas**
1. **Initial reading of volume of water in \( \text{CO}_2 \)-collecting graduated cylinder (mL)**
100 mL
2. **Final reading of volume of water in \( \text{CO}_2 \)-collecting graduated cylinder (mL)**
40 mL
3. **Volume of \( \text{CO}_2 (g) \) collected (L)**
\[
\frac{0.6}{760} \times \frac{273}{294.1} = 7.32
\]
4. **Temperature of water (°C)**
23°C
5. **Barometric pressure (torr)**
765.3 torr
6. **Vapor pressure of \( \text{H}_2\text{O} \) at ___ °C (torr)**
21.0 | 994.3 torr
7. **Pressure of dry \( \text{CO}_2 (g) \) (torr)**
\[ \text{Barometric pressure} - \text{vapor} \]
__________
**D. Amount of Carbon Dioxide Gas Evolved**
1. **Mass of generator + sample after reaction (g)**
47.22 g | __________
2. **Mass loss of generator = mass \( \text{CO}_2 \) evolved (g)**
\[
47.222 - 47.222 = 0.05 \, \text{g}
\]
3. **Moles of \( \text{CO}_2 \) evolved (mol)**
\[
0.055 -](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F377a7caf-b074-415b-a7a2-489899521086%2F9b8a55fb-ea44-4ed8-8440-8e7236e0c4ba%2Fnkleyd.jpeg&w=3840&q=75)
Transcribed Image Text:**Transcription for Educational Use:**
**A. Sample Preparation and Setup Apparatus**
*Calculation of mass of \( \text{CaCO}_3 \) sample for analysis (from Prelaboratory Assignment, question 2).*
---
**Unknown sample no. __________**
**Trial 1** | **Trial 2**
1. **Mass of sample (g)**
0.6 | __________
2. **Mass of generator + sample before reaction (g)**
47.27 | __________
3. **Instructor’s approval of apparatus**
__________
**C. Determination of Volume, Temperature, and Pressure of the Carbon Dioxide Gas**
1. **Initial reading of volume of water in \( \text{CO}_2 \)-collecting graduated cylinder (mL)**
100 mL
2. **Final reading of volume of water in \( \text{CO}_2 \)-collecting graduated cylinder (mL)**
40 mL
3. **Volume of \( \text{CO}_2 (g) \) collected (L)**
\[
\frac{0.6}{760} \times \frac{273}{294.1} = 7.32
\]
4. **Temperature of water (°C)**
23°C
5. **Barometric pressure (torr)**
765.3 torr
6. **Vapor pressure of \( \text{H}_2\text{O} \) at ___ °C (torr)**
21.0 | 994.3 torr
7. **Pressure of dry \( \text{CO}_2 (g) \) (torr)**
\[ \text{Barometric pressure} - \text{vapor} \]
__________
**D. Amount of Carbon Dioxide Gas Evolved**
1. **Mass of generator + sample after reaction (g)**
47.22 g | __________
2. **Mass loss of generator = mass \( \text{CO}_2 \) evolved (g)**
\[
47.222 - 47.222 = 0.05 \, \text{g}
\]
3. **Moles of \( \text{CO}_2 \) evolved (mol)**
\[
0.055 -
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