Textbook Question
What is chemically nonsensical about this structure?
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Ch. 2 The Chemical Basis of Life
Taylor, Simon, Dickey, Hogan10th EditionCampbell Biology: Concepts & ConnectionsISBN: 9780136538783
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Table of contents
- Ch. 1 Biology: The Study of Scientific Life19
- Ch. 2 The Chemical Basis of Life17
- Ch. 3 The Molecules of Cells21
- Ch. 4 A Tour of the Cell20
- Ch. 5 The Working Cell17
- Ch. 6 How Cells Harvest Chemical Energy18
- Ch. 7 Photosynthesis: Using Light to Make Food15
- Ch. 8 The Cellular Basis of Reproduction and Inheritance22
- Ch. 9 Patterns of Inheritance17
- Ch. 10 Molecular Biology of the Gene13
- Ch. 11 How Genes Are Controlled13
- Ch. 12 DNA Technology and Genomics23
- Ch. 13 How Populations Evolve17
- Ch. 14 The Origin of Species19
- Ch. 15 Tracing Evolutionary History18
- Ch. 16 Microbial Life: Prokaryotes and Protists16
- Ch. 17 The Evolution of Plant and Fungal Diversity15
- Ch. 18 The Evolution of Invertebrate Diversity13
- Ch. 19 The Evolution of Vertebrate Diversity18
- Ch. 20 Unifying Concepts of Animal Structure and Function11
- Ch. 21 Nutrition and Digestion16
- Ch. 22 Gas Exchange16
- Ch. 23 Circulation17
- Ch. 24 The Immune System16
- Ch. 25 Control of Body Temperature and Water Balance20
- Ch. 26 Hormones and the Endocrine System10
- Ch. 27 Reproduction and Embryonic Development12
- Ch. 28 Nervous Systems10
- Ch. 29 The Senses12
- Ch. 30 How Animals Move19
- Ch. 31 Plant Structure, Growth, and Reproduction9
- Ch. 32 Plant Nutrition and Transport12
- Ch. 33 Control Systems in Plants15
- Ch. 34 The Biosphere: An Introduction to Earth's Diverse Environments15
- Ch. 35 Behavioral Adaptations to the Environment12
- Ch. 36 Population Ecology15
- Ch. 37 Communities and Ecosystems14
- Ch. 38 Conservation Biology14
Taylor, Simon, Dickey, Hogan10th EditionCampbell Biology: Concepts & ConnectionsISBN: 9780136538783Not the one you use?Change textbook
Chapter 2, Problem 7
A can of cola consists mostly of sugar dissolved in water, with some carbon dioxide gas that makes it fizzy and makes the pH less than 7. In chemical terms, you could say that cola is an aqueous solution where water is the _________, sugar is a _________, and carbon dioxide makes the solution _________.
a. solvent . . . solute . . . basic
b. solute . . . solvent . . . basic
c. solvent . . . solute . . . acidic
d. solute . . . solvent . . . acidic
Verified step by step guidance1
Step 1: Understand the concept of an aqueous solution. An aqueous solution is a mixture where water acts as the solvent, meaning it is the substance in which other materials are dissolved.
Step 2: Identify the role of sugar in the cola. Sugar is dissolved in water, making it the solute, which is the substance being dissolved in the solvent.
Step 3: Analyze the role of carbon dioxide in the cola. Carbon dioxide gas dissolves in water and forms carbonic acid, which lowers the pH of the solution, making it acidic (pH less than 7).
Step 4: Match the terms 'solvent,' 'solute,' and 'acidic' to their respective roles in the cola. Water is the solvent, sugar is the solute, and carbon dioxide makes the solution acidic.
Step 5: Review the answer choices and select the one that correctly matches the roles: solvent (water), solute (sugar), and acidic (carbon dioxide).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Aqueous Solution
An aqueous solution is a solution in which water is the solvent. In this context, the solvent is the substance that dissolves the solute, allowing for the formation of a homogeneous mixture. For example, in a can of cola, water serves as the medium that dissolves sugar and carbon dioxide, creating the fizzy drink we consume.
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Homogenous vs. Heterogenous Solutions
Solute and Solvent
In a solution, the solute is the substance that is dissolved, while the solvent is the substance that does the dissolving. In cola, sugar is the solute because it is the component that dissolves in water, the solvent. Understanding the roles of solute and solvent is crucial for identifying the components of any solution.
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pH and Acidity
pH is a measure of the acidity or basicity of a solution, with values below 7 indicating acidity. In the case of cola, the presence of carbon dioxide contributes to its acidic nature, as it forms carbonic acid when dissolved in water. Recognizing the relationship between pH and the components of a solution helps in understanding the overall chemical properties of substances like cola.
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Related Practice
Textbook Question
A solution at pH 6 contains _________ H+ than the same amount of a solution at pH 8.
a. 20 times more
b. 100 times more
c. 2 times less
d. 100 times less
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Textbook Question
Most of the unique properties of water result from the fact that water molecules
a. Are the most abundant molecules on Earth's surface.
b. Are held together by covalent bonds.
c. Are constantly in motion.
d. Are polar and form hydrogen bonds.
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Textbook Question
The atomic number of sulfur (S) is 16. Sulfur combines with hydrogen by covalent bonding to form a compound, hydrogen sulfide. Based on the number of valence electrons in a sulfur atom, predict the molecular formula of the compound. (Explain your answer.)
a. HS
b. H₂S
c. H₄S₂
d. H₄S
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Textbook Question
In what way does the need for iodine or iron in your diet differ from your need for calcium or phosphorus?
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Textbook Question
Use carbon-12, the most common isotope of carbon, to define these terms: atomic number, mass number, valence. Which of these numbers is most related to the chemical behavior of an atom? Explain.
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