An object is electroplated with rhodium for 28.2 minutes at current of 1.4 A. Rh3+ + 3 e Rh Molar mass Rh = 102.9 g/mol F = 96,485.34 C/mol e A = C/s Given the information above, calculate how many grams of rhodium should theoretically be plated on the object.
An object is electroplated with rhodium for 28.2 minutes at current of 1.4 A. Rh3+ + 3 e Rh Molar mass Rh = 102.9 g/mol F = 96,485.34 C/mol e A = C/s Given the information above, calculate how many grams of rhodium should theoretically be plated on the object.
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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![**Electroplating with Rhodium: Calculation Exercise**
White gold is regular gold electroplated with rhodium. In this exercise, you will calculate the amount of rhodium theoretically plated on an object.
**Scenario:**
An object is electroplated with rhodium for 28.2 minutes at a current of 1.4 A.
- **Chemical Equation:**
\[ \text{Rh}^{3+} + 3 \text{e}^- \rightarrow \text{Rh} \]
- **Molar Mass of Rhodium (Rh):**
102.9 g/mol
- **Faraday's Constant (F):**
96,485.34 C/mol e^-
- **Formula:**
\[ \text{A} = \text{C/s} \]
**Task:**
Using the information provided, calculate how many grams of rhodium should theoretically be plated on the object.
**Instructions:**
When entering your answer, ensure the following:
- Enter the number only (no units).
- Do not leave any spaces.
- Use a leading zero before the decimal if necessary.
- Report your number to three decimal places, regardless of significant figures.
- Correctly round your answer to the third decimal place (the margin of allowed error is ±0.001, so always use unrounded numbers in your calculations).
**Examples:**
- Correct: 0.123 or 9.876](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F587f9f8f-b9b6-467a-a476-89151f1449a5%2Fc09f3013-f3eb-4cdd-8abc-27020d3b6fc9%2Ftyr1xiw_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Electroplating with Rhodium: Calculation Exercise**
White gold is regular gold electroplated with rhodium. In this exercise, you will calculate the amount of rhodium theoretically plated on an object.
**Scenario:**
An object is electroplated with rhodium for 28.2 minutes at a current of 1.4 A.
- **Chemical Equation:**
\[ \text{Rh}^{3+} + 3 \text{e}^- \rightarrow \text{Rh} \]
- **Molar Mass of Rhodium (Rh):**
102.9 g/mol
- **Faraday's Constant (F):**
96,485.34 C/mol e^-
- **Formula:**
\[ \text{A} = \text{C/s} \]
**Task:**
Using the information provided, calculate how many grams of rhodium should theoretically be plated on the object.
**Instructions:**
When entering your answer, ensure the following:
- Enter the number only (no units).
- Do not leave any spaces.
- Use a leading zero before the decimal if necessary.
- Report your number to three decimal places, regardless of significant figures.
- Correctly round your answer to the third decimal place (the margin of allowed error is ±0.001, so always use unrounded numbers in your calculations).
**Examples:**
- Correct: 0.123 or 9.876
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