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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Question
25.
![**Question 25:** To four significant figures, what is the molarity of pure water? Show all work.
This question requires you to calculate the molarity of pure water with precision up to four significant figures. To solve this problem, remember that molarity is defined as moles of solute per liter of solution.
1. Utilize the density of water, which is approximately 1 gram per milliliter.
2. Calculate the number of grams in 1 liter (1000 milliliters), which is 1000 grams.
3. Use the molar mass of water (H₂O), approximately 18.015 g/mol, to convert grams to moles.
\[
\text{Moles of water} = \frac{1000\, \text{g}}{18.015\, \text{g/mol}} \approx 55.51 \, \text{moles/L}
\]
Therefore, the molarity of pure water is approximately 55.51 mol/L, keeping significant figures in mind.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbeb4d536-f388-44bc-91f3-a72ed115bd90%2F3546b2c6-511e-49e1-9558-34ab07d7606e%2Fy3a2a0r_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Question 25:** To four significant figures, what is the molarity of pure water? Show all work.
This question requires you to calculate the molarity of pure water with precision up to four significant figures. To solve this problem, remember that molarity is defined as moles of solute per liter of solution.
1. Utilize the density of water, which is approximately 1 gram per milliliter.
2. Calculate the number of grams in 1 liter (1000 milliliters), which is 1000 grams.
3. Use the molar mass of water (H₂O), approximately 18.015 g/mol, to convert grams to moles.
\[
\text{Moles of water} = \frac{1000\, \text{g}}{18.015\, \text{g/mol}} \approx 55.51 \, \text{moles/L}
\]
Therefore, the molarity of pure water is approximately 55.51 mol/L, keeping significant figures in mind.
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