A Substance With A High $\left[ H^{+} \right] Would Likely Have Which Additional Characteristics?A. A High $\left[ OH^{-} \right] And A High POH B. A Low $\left[ OH^{-} \right] And A High POH C. A High $\left[ OH^{-}

Mar 12, 2025 by ADMIN 219 views

**Understanding pH and pOH: A Comprehensive Guide**

Introduction

In the realm of chemistry, pH and pOH are two fundamental concepts that play a crucial role in understanding the properties of aqueous solutions. pH is a measure of the concentration of hydrogen ions (H+) in a solution, while pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. In this article, we will delve into the characteristics of a substance with a high [H+] and explore the relationship between pH and pOH.

What is pH?

pH is a measure of the concentration of hydrogen ions (H+) in a solution. It is defined as the negative logarithm of the concentration of hydrogen ions in moles per liter (M). Mathematically, pH can be represented as:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in moles per liter.

What is pOH?

pOH is a measure of the concentration of hydroxide ions (OH-) in a solution. It is defined as the negative logarithm of the concentration of hydroxide ions in moles per liter (M). Mathematically, pOH can be represented as:

pOH = -log[OH-]

where [OH-] is the concentration of hydroxide ions in moles per liter.

Relationship between pH and pOH

The relationship between pH and pOH is governed by the following equation:

pH + pOH = 14

This equation indicates that the sum of pH and pOH is always 14, regardless of the concentration of hydrogen and hydroxide ions in the solution.

Characteristics of a Substance with a High [H+]

A substance with a high [H+] would likely have the following characteristics:

Low pH: A high [H+] indicates a low pH, which means the solution is acidic.
Low [OH-]: A high [H+] also indicates a low concentration of hydroxide ions (OH-).
High pOH: Since pOH is the negative logarithm of [OH-], a low [OH-] would result in a high pOH.

Option Analysis

Let's analyze the options provided:

A. A high [OH-] and a high pOH: This option is incorrect because a high [H+] would result in a low [OH-] and a high pOH, not a high [OH-].

B. A low [OH-] and a high pOH: This option is correct because a high [H+] would result in a low [OH-] and a high pOH.

C. A high [OH-]: This option is incorrect because a high [H+] would result in a low [OH-], not a high [OH-].

Conclusion

In conclusion, a substance with a high [H+] would likely have a low pH, a low [OH-], and a high pOH. This is because a high [H+] indicates a low pH, which in turn results in a low [OH-] and a high pOH. Understanding the relationship between pH and pOH is crucial in chemistry, and this article has provided a comprehensive guide to help you grasp this concept.

Frequently Asked Questions

Q: What is the relationship between pH and pOH?

A: The relationship between pH and pOH is governed by the equation pH + pOH = 14.

Q: What is the effect of a high [H+] on pH and pOH?

A: A high [H+] would result in a low pH and a high pOH.

Q: What is the effect of a high [H+] on [OH-]?

A: A high [H+] would result in a low [OH-].

Q: What is the correct option for a substance with a high [H+]?

A: The correct option is B: A low [OH-] and a high pOH.

References

Atkins, P. W., & De Paula, J. (2010). Physical chemistry. Oxford University Press.
Brown, T. E., & LeMay, H. E. (2014). Chemistry: The Central Science. Pearson Education.
Petrucci, R. H., Harwood, W. S., & Herring, F. G. (2016). General chemistry: Principles and modern applications. Pearson Education.
A Comprehensive Guide to pH and pOH: Q&A =====================================================

Introduction

In our previous article, we explored the characteristics of a substance with a high [H+]. We discussed the relationship between pH and pOH, and how a high [H+] affects pH, pOH, and [OH-]. In this article, we will continue to delve into the world of pH and pOH, and answer some of the most frequently asked questions in chemistry.

Q&A

Q: What is the pH scale?

A: The pH scale is a measure of the concentration of hydrogen ions (H+) in a solution. It ranges from 0 to 14, with a pH of 7 being neutral (neither acidic nor basic).

Q: What is the pH of pure water?

A: The pH of pure water is 7, which is neutral.

Q: What is the pH of a strong acid?

A: The pH of a strong acid is less than 7, indicating an acidic solution.

Q: What is the pH of a strong base?

A: The pH of a strong base is greater than 7, indicating a basic solution.

Q: What is the relationship between pH and pOH?

A: The relationship between pH and pOH is governed by the equation pH + pOH = 14.

Q: What is the effect of a high [H+] on pH and pOH?

A: A high [H+] would result in a low pH and a high pOH.

Q: What is the effect of a high [H+] on [OH-]?

A: A high [H+] would result in a low [OH-].

Q: What is the correct option for a substance with a high [H+]?

A: The correct option is B: A low [OH-] and a high pOH.

Q: What is the pH of a solution with a high [H+]?

A: The pH of a solution with a high [H+] would be low, indicating an acidic solution.

Q: What is the pH of a solution with a low [H+]?

A: The pH of a solution with a low [H+] would be high, indicating a basic solution.

Q: What is the relationship between pH and the concentration of hydrogen ions?

A: The pH of a solution is inversely proportional to the concentration of hydrogen ions.

Q: What is the relationship between pOH and the concentration of hydroxide ions?

A: The pOH of a solution is inversely proportional to the concentration of hydroxide ions.

Q: What is the effect of temperature on pH?

A: Temperature has a negligible effect on pH.

Q: What is the effect of pressure on pH?

A: Pressure has a negligible effect on pH.

Q: What is the effect of concentration on pH?

A: The concentration of a solution has a significant effect on pH.

Q: What is the effect of the presence of other ions on pH?

A: The presence of other ions can affect pH, but it is generally negligible.