Done< session.mastering biology.com Ch02 The pH Scale рп=-10g|п [H3O+] = 10-PH pH 0 1 2 3 As pH decreases, acidity increases. As pH increases, acidity decreases. wine Acidic solution: pH <7 • Neutral solution: pH = 7 stomach acid lemon juice vinegar, soft drinks, beer • Basic solution: pH > 7 Part A Calculating pH What is the pH of an aqueous solution with the hydronium ion concentration [H3O+] = 2 x 10-14 M? Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3. View Available Hint(s) Submit Request Answer ▼ Part B - Determining hydronium ion concentrations Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. What is the molar concentration of [H3O+] in a cola that has a pH of 3.120? (For help with significant figures, see Hint 3.) View Available Hint(s) > AA ▼ tomatoes black coffee < 10 11 12 13 14 milk oven cleaner of magnesia house- hold ammonia pure baking soda water household bleach Adapted from Biological Science by Freeman © 2008 Pearson Education, Inc. urine human blood milk A sea- water 2 of 17 DIDIE Q
Done< session.mastering biology.com Ch02 The pH Scale рп=-10g|п [H3O+] = 10-PH pH 0 1 2 3 As pH decreases, acidity increases. As pH increases, acidity decreases. wine Acidic solution: pH <7 • Neutral solution: pH = 7 stomach acid lemon juice vinegar, soft drinks, beer • Basic solution: pH > 7 Part A Calculating pH What is the pH of an aqueous solution with the hydronium ion concentration [H3O+] = 2 x 10-14 M? Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3. View Available Hint(s) Submit Request Answer ▼ Part B - Determining hydronium ion concentrations Carbonated cola is more acidic than coffee or even orange juice because cola contains phosphoric acid. What is the molar concentration of [H3O+] in a cola that has a pH of 3.120? (For help with significant figures, see Hint 3.) View Available Hint(s) > AA ▼ tomatoes black coffee < 10 11 12 13 14 milk oven cleaner of magnesia house- hold ammonia pure baking soda water household bleach Adapted from Biological Science by Freeman © 2008 Pearson Education, Inc. urine human blood milk A sea- water 2 of 17 DIDIE Q
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
What is the pH of an acqueous solution w/the hydro noun ion concentration [H3O+] = 2 x 10^14 M?
![### The pH Scale
The pH scale is used to measure the acidity or basicity of a solution, a key concept in chemistry and biology. The pH of a solution is determined by the concentration of hydronium ions \([H_3O^+]\) present.
#### Key Definitions:
- **Acidic solution**: pH < 7
- **Neutral solution**: pH = 7
- **Basic solution**: pH > 7
### Mathematical Formulas:
- **pH = -log\([H_3O^+]\)**
- **[H_3O^+] = 10^-pH**
As pH decreases, acidity increases. Conversely, as pH increases, acidity decreases.
### Graph Description:
The diagram shown below the text is a visual representation of the pH scale:
- **0 to 7 (acidic range)**:
- **Stomach acid**: pH close to 1
- **Lemon juice, vinegar, soft drinks, beer**: pH around 2-4
- **Wine, tomatoes**: pH around 4
- **Black coffee**: pH around 5
- **7 (neutral)**:
- **Pure water**: pH 7
- **7 to 14 (basic range)**:
- **Human blood**: pH around 7.4
- **Seawater**: pH around 8
- **Baking soda**: pH around 9
- **Milk of magnesia**: pH around 10
- **Ammonia solution, household bleach**: pH around 11-12
- **Oven cleaner**: pH around 13-14
This diagram helps visualize where common substances fall on the pH scale.
### Part A - Calculating pH
**Problem:** What is the pH of an aqueous solution with the hydronium ion concentration \([H_3O^+] = 2 x 10^{-14} \text{M}\)?
**Important Note:**
Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3.
**Submission Form:**
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- [Submit Button]
- [Request Answer]
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Transcribed Image Text:### The pH Scale
The pH scale is used to measure the acidity or basicity of a solution, a key concept in chemistry and biology. The pH of a solution is determined by the concentration of hydronium ions \([H_3O^+]\) present.
#### Key Definitions:
- **Acidic solution**: pH < 7
- **Neutral solution**: pH = 7
- **Basic solution**: pH > 7
### Mathematical Formulas:
- **pH = -log\([H_3O^+]\)**
- **[H_3O^+] = 10^-pH**
As pH decreases, acidity increases. Conversely, as pH increases, acidity decreases.
### Graph Description:
The diagram shown below the text is a visual representation of the pH scale:
- **0 to 7 (acidic range)**:
- **Stomach acid**: pH close to 1
- **Lemon juice, vinegar, soft drinks, beer**: pH around 2-4
- **Wine, tomatoes**: pH around 4
- **Black coffee**: pH around 5
- **7 (neutral)**:
- **Pure water**: pH 7
- **7 to 14 (basic range)**:
- **Human blood**: pH around 7.4
- **Seawater**: pH around 8
- **Baking soda**: pH around 9
- **Milk of magnesia**: pH around 10
- **Ammonia solution, household bleach**: pH around 11-12
- **Oven cleaner**: pH around 13-14
This diagram helps visualize where common substances fall on the pH scale.
### Part A - Calculating pH
**Problem:** What is the pH of an aqueous solution with the hydronium ion concentration \([H_3O^+] = 2 x 10^{-14} \text{M}\)?
**Important Note:**
Make sure that your answer has the correct number of significant figures. For help determining the correct number of significant figures, see Hint 3.
**Submission Form:**
[Input field here]
- [Submit Button]
- [Request Answer]
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