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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![### Calibration Curve and Calculating Molar Concentration
**Graph Explanation:**
The graph provided is a calibration curve that demonstrates the relationship between the absorbance and molar concentration of a solution. The x-axis represents the concentration in molarity (M), ranging from 0 to 0.00025 M. The y-axis represents the absorbance, ranging from 0 to 0.6.
A linear relationship is observed, represented by the equation \( y = 2755x \), where \( y \) is the absorbance and \( x \) is the concentration. The graph shows a straight line that passes through multiple data points, indicating a strong correlation between absorbance and concentration.
**Question:**
Using the calibration curve, calculate the molar concentration for a solution with a measured absorbance of 0.185.
**Calculation Formula:**
\[ \text{Concentration} = \frac{\text{Absorbance}}{\text{Slope}} \]
Given the slope from the graph equation (\( y = 2755x \)), we can calculate the concentration as follows:
\[ x = \frac{y}{2755} \]
Using these details, fill in the equation below:
\[ \text{Concentration} = \boxed{} \times 10^{\boxed{}} \text{ M} \]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F65e83490-1080-404e-b789-c63cb753ded3%2Fac44c45b-a3b7-490b-b3cc-d6868da650ba%2F6n22gbe.png&w=3840&q=75)
Transcribed Image Text:### Calibration Curve and Calculating Molar Concentration
**Graph Explanation:**
The graph provided is a calibration curve that demonstrates the relationship between the absorbance and molar concentration of a solution. The x-axis represents the concentration in molarity (M), ranging from 0 to 0.00025 M. The y-axis represents the absorbance, ranging from 0 to 0.6.
A linear relationship is observed, represented by the equation \( y = 2755x \), where \( y \) is the absorbance and \( x \) is the concentration. The graph shows a straight line that passes through multiple data points, indicating a strong correlation between absorbance and concentration.
**Question:**
Using the calibration curve, calculate the molar concentration for a solution with a measured absorbance of 0.185.
**Calculation Formula:**
\[ \text{Concentration} = \frac{\text{Absorbance}}{\text{Slope}} \]
Given the slope from the graph equation (\( y = 2755x \)), we can calculate the concentration as follows:
\[ x = \frac{y}{2755} \]
Using these details, fill in the equation below:
\[ \text{Concentration} = \boxed{} \times 10^{\boxed{}} \text{ M} \]
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