**Experiment 35 Report Sheet** **Spectrophotometric Metal Ion Analysis** **Metal Ion for Analysis** --- **A. A Set of Standard Solutions** 1. **Prepare a stock solution.** Show the calculation for the mass of metal ion salt in the preparation of the stock solution. Refer to Prelaboratory Assignment, question 2a. Calculation: \[ 100\text{mL} \times 1\text{L} / 1000\text{mL} \times 0.10\text{mol} / 1\text{L} \times 249.68\text{g} = 2.5\text{g } \text{CuSO}_4\cdot\text{5H}_2\text{O} \] - **Measured tared mass of metal ion salt (g):** 2.499 - **Description of the preparation of the 0.10 M stock solution.** - **Concentration of stock solution (mol/L):** 0.01 M --- **B. Determination of \(λ_{max}\)** 2. **Wavelength Scan.** Use the following table to record the wavelength and absorbance data. | λ | Abs | λ | Abs | λ | Abs | λ | Abs | λ | Abs | |------|-----|------|-----|------|-----|------|-----|------|-----| | | | | | | | | | | | - **Plot the data of absorbance versus wavelength to set \(λ_{max}\). From the data plot, \(λ_{max}\):** 610 nm - **Have the instructor approve your graph.** --- **C. Plot the Calibration Curve** 1. **Absorbance of Standard Solutions.** Read and record the absorbance values for the standard solutions. | Standard Solution | Volume of Standard Solution (μL) | Absorbance | Calculated Molar Concentration | |-------------------|-----------------------------------|------------|--------------------------------| | Blank | 0 | 0.033 | | | 1 | 2 | 0.095 | | | 2 | 5 | 0.763 |
**Experiment 35 Report Sheet** **Spectrophotometric Metal Ion Analysis** **Metal Ion for Analysis** --- **A. A Set of Standard Solutions** 1. **Prepare a stock solution.** Show the calculation for the mass of metal ion salt in the preparation of the stock solution. Refer to Prelaboratory Assignment, question 2a. Calculation: \[ 100\text{mL} \times 1\text{L} / 1000\text{mL} \times 0.10\text{mol} / 1\text{L} \times 249.68\text{g} = 2.5\text{g } \text{CuSO}_4\cdot\text{5H}_2\text{O} \] - **Measured tared mass of metal ion salt (g):** 2.499 - **Description of the preparation of the 0.10 M stock solution.** - **Concentration of stock solution (mol/L):** 0.01 M --- **B. Determination of \(λ_{max}\)** 2. **Wavelength Scan.** Use the following table to record the wavelength and absorbance data. | λ | Abs | λ | Abs | λ | Abs | λ | Abs | λ | Abs | |------|-----|------|-----|------|-----|------|-----|------|-----| | | | | | | | | | | | - **Plot the data of absorbance versus wavelength to set \(λ_{max}\). From the data plot, \(λ_{max}\):** 610 nm - **Have the instructor approve your graph.** --- **C. Plot the Calibration Curve** 1. **Absorbance of Standard Solutions.** Read and record the absorbance values for the standard solutions. | Standard Solution | Volume of Standard Solution (μL) | Absorbance | Calculated Molar Concentration | |-------------------|-----------------------------------|------------|--------------------------------| | Blank | 0 | 0.033 | | | 1 | 2 | 0.095 | | | 2 | 5 | 0.763 |
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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i need help calculating the molar concentration for part C
![**Experiment 35 Report Sheet**
**Spectrophotometric Metal Ion Analysis**
**Metal Ion for Analysis**
---
**A. A Set of Standard Solutions**
1. **Prepare a stock solution.** Show the calculation for the mass of metal ion salt in the preparation of the stock solution. Refer to Prelaboratory Assignment, question 2a.
Calculation:
\[
100\text{mL} \times 1\text{L} / 1000\text{mL} \times 0.10\text{mol} / 1\text{L} \times 249.68\text{g} = 2.5\text{g } \text{CuSO}_4\cdot\text{5H}_2\text{O}
\]
- **Measured tared mass of metal ion salt (g):** 2.499
- **Description of the preparation of the 0.10 M stock solution.**
- **Concentration of stock solution (mol/L):** 0.01 M
---
**B. Determination of \(λ_{max}\)**
2. **Wavelength Scan.** Use the following table to record the wavelength and absorbance data.
| λ | Abs | λ | Abs | λ | Abs | λ | Abs | λ | Abs |
|------|-----|------|-----|------|-----|------|-----|------|-----|
| | | | | | | | | | |
- **Plot the data of absorbance versus wavelength to set \(λ_{max}\). From the data plot, \(λ_{max}\):** 610 nm
- **Have the instructor approve your graph.**
---
**C. Plot the Calibration Curve**
1. **Absorbance of Standard Solutions.** Read and record the absorbance values for the standard solutions.
| Standard Solution | Volume of Standard Solution (μL) | Absorbance | Calculated Molar Concentration |
|-------------------|-----------------------------------|------------|--------------------------------|
| Blank | 0 | 0.033 | |
| 1 | 2 | 0.095 | |
| 2 | 5 | 0.763 |](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0a649de7-a7ff-4d39-839c-f05925276079%2F9fbef3f8-ddf8-4155-a07b-b846429f51de%2Ftcm7ozd.jpeg&w=3840&q=75)
Transcribed Image Text:**Experiment 35 Report Sheet**
**Spectrophotometric Metal Ion Analysis**
**Metal Ion for Analysis**
---
**A. A Set of Standard Solutions**
1. **Prepare a stock solution.** Show the calculation for the mass of metal ion salt in the preparation of the stock solution. Refer to Prelaboratory Assignment, question 2a.
Calculation:
\[
100\text{mL} \times 1\text{L} / 1000\text{mL} \times 0.10\text{mol} / 1\text{L} \times 249.68\text{g} = 2.5\text{g } \text{CuSO}_4\cdot\text{5H}_2\text{O}
\]
- **Measured tared mass of metal ion salt (g):** 2.499
- **Description of the preparation of the 0.10 M stock solution.**
- **Concentration of stock solution (mol/L):** 0.01 M
---
**B. Determination of \(λ_{max}\)**
2. **Wavelength Scan.** Use the following table to record the wavelength and absorbance data.
| λ | Abs | λ | Abs | λ | Abs | λ | Abs | λ | Abs |
|------|-----|------|-----|------|-----|------|-----|------|-----|
| | | | | | | | | | |
- **Plot the data of absorbance versus wavelength to set \(λ_{max}\). From the data plot, \(λ_{max}\):** 610 nm
- **Have the instructor approve your graph.**
---
**C. Plot the Calibration Curve**
1. **Absorbance of Standard Solutions.** Read and record the absorbance values for the standard solutions.
| Standard Solution | Volume of Standard Solution (μL) | Absorbance | Calculated Molar Concentration |
|-------------------|-----------------------------------|------------|--------------------------------|
| Blank | 0 | 0.033 | |
| 1 | 2 | 0.095 | |
| 2 | 5 | 0.763 |
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