Which Option Correctly Shows The Concentration Of $H_3O^+$ Ions In Pure Water (pH 7)?A. 1.0 × 10 − 7 1.0 \times 10^{-7} 1.0 × 1 0 − 7 Mol/L B. 14 14 14 Mol/L C. 1.0 × 10 − 14 1.0 \times 10^{-14} 1.0 × 1 0 − 14 Mol/L D. 7 7 7 Mol/L
Introduction
Pure water is a fundamental substance in chemistry, and its properties have been extensively studied. One of the key aspects of pure water is its pH level, which is a measure of its acidity or basicity. In this article, we will explore the concentration of hydrogen ions ($H_3O^+$) in pure water and determine the correct option that represents this concentration.
pH and Hydrogen Ion Concentration
The pH of a solution is defined as the negative logarithm of the concentration of hydrogen ions ($H_3O^+$) in moles per liter (mol/L). Mathematically, this can be represented as:
pH = -log[H_3O^+]
where [H_3O^+] is the concentration of hydrogen ions in mol/L.
Pure Water and pH 7
Pure water has a pH of 7, which is considered neutral. This means that the concentration of hydrogen ions ($H_3O^+$) in pure water is equal to the concentration of hydroxide ions ($OH^-$). The concentration of hydrogen ions in pure water can be calculated using the pH formula:
[H_3O^+] = 10^(-pH)
Substituting the pH value of 7 into the formula, we get:
[H_3O^+] = 10^(-7)
Evaluating the Options
Now that we have calculated the concentration of hydrogen ions in pure water, let's evaluate the options provided:
A. mol/L B. mol/L C. mol/L D. mol/L
Option A: mol/L
This option matches the calculated concentration of hydrogen ions in pure water. Therefore, this is the correct answer.
Option B: mol/L
This option is incorrect because the concentration of hydrogen ions in pure water is not 14 mol/L. This value is actually the product of the concentrations of hydrogen and hydroxide ions in pure water, which is 10^(-14) mol/L.
Option C: mol/L
This option is incorrect because the concentration of hydrogen ions in pure water is not 10^(-14) mol/L. This value is actually the product of the concentrations of hydrogen and hydroxide ions in pure water.
Option D: mol/L
This option is incorrect because the concentration of hydrogen ions in pure water is not 7 mol/L. This value is actually the pH of pure water, not the concentration of hydrogen ions.
Conclusion
In conclusion, the correct option that shows the concentration of $H_3O^+$ ions in pure water (pH 7) is A. mol/L. This option matches the calculated concentration of hydrogen ions in pure water, which is 10^(-7) mol/L.
Understanding pH and Concentration of Hydrogen Ions in Pure Water: Key Takeaways
- Pure water has a pH of 7, which is considered neutral.
- The concentration of hydrogen ions ($H_3O^+$) in pure water can be calculated using the pH formula: [H_3O^+] = 10^(-pH).
- The correct concentration of hydrogen ions in pure water is 10^(-7) mol/L.
- The product of the concentrations of hydrogen and hydroxide ions in pure water is 10^(-14) mol/L.
Frequently Asked Questions
Q: What is the pH of pure water?
A: The pH of pure water is 7.
Q: What is the concentration of hydrogen ions in pure water?
A: The concentration of hydrogen ions in pure water is 10^(-7) mol/L.
Q: What is the product of the concentrations of hydrogen and hydroxide ions in pure water?
A: The product of the concentrations of hydrogen and hydroxide ions in pure water is 10^(-14) mol/L.
Q: Which option correctly shows the concentration of $H_3O^+$ ions in pure water (pH 7)?
Introduction
In our previous article, we explored the concentration of hydrogen ions ($H_3O^+$) in pure water and determined the correct option that represents this concentration. In this article, we will continue to provide more information and answer frequently asked questions about pH and concentration of hydrogen ions in pure water.
Q&A Session
Q: What is pH and how is it related to hydrogen ions?
A: pH is a measure of the acidity or basicity of a solution, and it is related to the concentration of hydrogen ions ($H_3O^+$). The pH of a solution is defined as the negative logarithm of the concentration of hydrogen ions in moles per liter (mol/L).
Q: What is the pH of pure water?
A: The pH of pure water is 7, which is considered neutral.
Q: What is the concentration of hydrogen ions in pure water?
A: The concentration of hydrogen ions in pure water is 10^(-7) mol/L.
Q: How is the concentration of hydrogen ions in pure water calculated?
A: The concentration of hydrogen ions in pure water can be calculated using the pH formula: [H_3O^+] = 10^(-pH).
Q: What is the product of the concentrations of hydrogen and hydroxide ions in pure water?
A: The product of the concentrations of hydrogen and hydroxide ions in pure water is 10^(-14) mol/L.
Q: Why is the product of the concentrations of hydrogen and hydroxide ions in pure water 10^(-14) mol/L?
A: The product of the concentrations of hydrogen and hydroxide ions in pure water is 10^(-14) mol/L because the concentrations of hydrogen and hydroxide ions are equal in pure water, and the product of two equal numbers is the square of each number.
Q: What is the relationship between pH and the concentration of hydrogen ions?
A: The pH of a solution is inversely related to the concentration of hydrogen ions. As the concentration of hydrogen ions increases, the pH of the solution decreases, and vice versa.
Q: How does the pH of a solution affect its properties?
A: The pH of a solution affects its properties, such as its ability to conduct electricity, its reactivity with other substances, and its ability to dissolve certain substances.
Q: What are some common applications of pH in everyday life?
A: pH has many common applications in everyday life, such as in the production of food and beverages, in the treatment of water and wastewater, and in the development of personal care products.
Conclusion
In conclusion, pH and concentration of hydrogen ions in pure water are fundamental concepts in chemistry that have many practical applications in everyday life. We hope that this Q&A article has provided you with a better understanding of these concepts and their importance in various fields.
Understanding pH and Concentration of Hydrogen Ions in Pure Water: Key Takeaways
- pH is a measure of the acidity or basicity of a solution.
- The pH of pure water is 7, which is considered neutral.
- The concentration of hydrogen ions in pure water is 10^(-7) mol/L.
- The product of the concentrations of hydrogen and hydroxide ions in pure water is 10^(-14) mol/L.
- The pH of a solution is inversely related to the concentration of hydrogen ions.
- The pH of a solution affects its properties, such as its ability to conduct electricity, its reactivity with other substances, and its ability to dissolve certain substances.
Frequently Asked Questions
Q: What is the pH of a solution with a high concentration of hydrogen ions?
A: The pH of a solution with a high concentration of hydrogen ions is low.
Q: What is the pH of a solution with a low concentration of hydrogen ions?
A: The pH of a solution with a low concentration of hydrogen ions is high.
Q: How does the pH of a solution affect its ability to conduct electricity?
A: The pH of a solution affects its ability to conduct electricity, with acidic solutions being better conductors than basic solutions.
Q: How does the pH of a solution affect its reactivity with other substances?
A: The pH of a solution affects its reactivity with other substances, with acidic solutions being more reactive than basic solutions.
Q: How does the pH of a solution affect its ability to dissolve certain substances?
A: The pH of a solution affects its ability to dissolve certain substances, with acidic solutions being better at dissolving certain substances than basic solutions.