Calculate the molarity, M, of KCl when 3.50 g KCI are dissolved in 2.50 x 10 mL of solution. Enter your answer in scientific notation. Be sure to answer all parts.
Calculate the molarity, M, of KCl when 3.50 g KCI are dissolved in 2.50 x 10 mL of solution. Enter your answer in scientific notation. Be sure to answer all parts.
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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![**Problem Statement:**
Calculate the molarity, \( M \), of KCl when 3.50 g KCl are dissolved in \( 2.50 \times 10^3 \) mL of solution. Enter your answer in scientific notation. Be sure to answer all parts.
\[ \square \times 10^{(\text{select})} \, M \, \text{KCl} \]
---
**Instructions:**
1. Calculate the number of moles of KCl using the formula:
\[
\text{moles of KCl} = \frac{\text{mass of KCl (g)}}{\text{molar mass of KCl (g/mol)}}
\]
*Note: The molar mass of KCl (potassium chloride) is approximately 74.55 g/mol.*
2. Convert the volume of the solution from mL to L:
\[
\text{volume in liters} = \frac{2.50 \times 10^3 \, \text{mL}}{1000 \, \text{mL/L}}
\]
3. Calculate the molarity (\( M \)) of the KCl solution using the formula:
\[
M = \frac{\text{moles of KCl}}{\text{volume of solution in L}}
\]
4. Express the molarity in scientific notation as required.
---
This problem requires an understanding of molarity, unit conversions, and scientific notation to find the concentration of a potassium chloride solution.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F073eb5ef-2617-4d6f-9bce-a81ca84c4945%2Fee965603-af9f-40e4-b27f-00aa6ae31ac7%2Ff9tfxzg.jpeg&w=3840&q=75)
Transcribed Image Text:**Problem Statement:**
Calculate the molarity, \( M \), of KCl when 3.50 g KCl are dissolved in \( 2.50 \times 10^3 \) mL of solution. Enter your answer in scientific notation. Be sure to answer all parts.
\[ \square \times 10^{(\text{select})} \, M \, \text{KCl} \]
---
**Instructions:**
1. Calculate the number of moles of KCl using the formula:
\[
\text{moles of KCl} = \frac{\text{mass of KCl (g)}}{\text{molar mass of KCl (g/mol)}}
\]
*Note: The molar mass of KCl (potassium chloride) is approximately 74.55 g/mol.*
2. Convert the volume of the solution from mL to L:
\[
\text{volume in liters} = \frac{2.50 \times 10^3 \, \text{mL}}{1000 \, \text{mL/L}}
\]
3. Calculate the molarity (\( M \)) of the KCl solution using the formula:
\[
M = \frac{\text{moles of KCl}}{\text{volume of solution in L}}
\]
4. Express the molarity in scientific notation as required.
---
This problem requires an understanding of molarity, unit conversions, and scientific notation to find the concentration of a potassium chloride solution.
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