Correct. What is the concentration of H* in 0.0072 M HCIO4? [H]= 0.0072 Hint HCIO4 is a strong acid. Correct. What is the pH of the solution? pH = 2.14 M Correct. [OH]= 1.38E-12 What is the OH concentration in the solution? For scientific notations, use the format 1.0E-10, for example. M Assistance Used Incorrect. Compare the pH at double concentration to the pH at the original concentration. How would you expect the pH to change with an increase in [H]? By how much does the pH change if the concentration of H is doubled? i

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter16: Reactions Between Acids And Bases
Section: Chapter Questions
Problem 16.87QE
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**Acid-Base Chemistry: Understanding Concentrations and pH**

**1. Hydrogen Ion Concentration in Perchloric Acid Solution**

- **Question:** What is the concentration of \( \text{H}^+ \) in 0.0072 M \( \text{HClO}_4 \)?
- **Answer:** \([ \text{H}^+ ] = 0.0072 \, \text{M}\)
- **Hint:** \( \text{HClO}_4 \) is a strong acid.

**2. Calculating pH**

- **Question:** What is the pH of the solution?
- **Answer:** \( \text{pH} = 2.14 \)

**3. Hydroxide Ion Concentration**

- **Question:** What is the \( \text{OH}^- \) concentration in the solution? For scientific notations, use the format 1.0E-10, for example.
- **Answer:** \([ \text{OH}^- ] = 1.38 \times 10^{-12} \, \text{M}\)

**4. pH Change with Increased Hydrogen Ion Concentration**

- **Note:** The question about the pH change when the hydrogen ion concentration is doubled remains unanswered. Students are encouraged to consider how the pH would adjust with an increase in \([ \text{H}^+ ]\).

This educational material presents the basic calculations involved in determining the characteristics of an acidic solution, illustrating relationships between concentration, pH, and ion presence in solution.
Transcribed Image Text:**Acid-Base Chemistry: Understanding Concentrations and pH** **1. Hydrogen Ion Concentration in Perchloric Acid Solution** - **Question:** What is the concentration of \( \text{H}^+ \) in 0.0072 M \( \text{HClO}_4 \)? - **Answer:** \([ \text{H}^+ ] = 0.0072 \, \text{M}\) - **Hint:** \( \text{HClO}_4 \) is a strong acid. **2. Calculating pH** - **Question:** What is the pH of the solution? - **Answer:** \( \text{pH} = 2.14 \) **3. Hydroxide Ion Concentration** - **Question:** What is the \( \text{OH}^- \) concentration in the solution? For scientific notations, use the format 1.0E-10, for example. - **Answer:** \([ \text{OH}^- ] = 1.38 \times 10^{-12} \, \text{M}\) **4. pH Change with Increased Hydrogen Ion Concentration** - **Note:** The question about the pH change when the hydrogen ion concentration is doubled remains unanswered. Students are encouraged to consider how the pH would adjust with an increase in \([ \text{H}^+ ]\). This educational material presents the basic calculations involved in determining the characteristics of an acidic solution, illustrating relationships between concentration, pH, and ion presence in solution.
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