Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

2. Cell Chemistry & Cell Components

pH Scale

Anatomy & Physiology

2. Cell Chemistry & Cell Components

pH Scale

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2:02 minutes

Problem 5

Textbook Question

A solution at pH 6 contains _________ H+ than the same amount of a solution at pH 8.a. 20 times moreb. 100 times morec. 2 times lessd. 100 times less

Verified step by step guidance

Understand that pH is a measure of the hydrogen ion concentration \([H^+]\) in a solution.

Recall that the pH scale is logarithmic, meaning each whole number change on the scale represents a tenfold change in \([H^+]\).

Calculate the difference in pH between the two solutions: pH 6 and pH 8, which is 2 units.

Since the pH scale is logarithmic, a difference of 2 pH units means a \(10^2\) or 100-fold difference in \([H^+]\).

Determine that a solution at pH 6 has 100 times more \([H^+]\) than a solution at pH 8.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

pH Scale

The pH scale measures the acidity or basicity of a solution, ranging from 0 to 14. A pH of 7 is neutral, while values below 7 indicate acidity and above 7 indicate alkalinity. Each whole number change on the pH scale represents a tenfold change in hydrogen ion concentration (H+), making it crucial for understanding the relationship between pH and H+ concentration.

Hydrogen Ion Concentration

Hydrogen ion concentration refers to the amount of H+ ions present in a solution, which directly affects its pH level. A lower pH indicates a higher concentration of H+ ions, while a higher pH indicates a lower concentration. For example, a solution at pH 6 has 10 times more H+ than at pH 7, and 100 times more than at pH 8.

Logarithmic Scale

The pH scale is logarithmic, meaning that each unit change in pH corresponds to a tenfold change in H+ concentration. Therefore, a solution with a pH of 6 has 100 times more H+ ions than a solution with a pH of 8. This concept is essential for calculating differences in acidity and understanding the implications of pH changes in chemical reactions.