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Questions and Answers
What is the molecular structure of water?
What is the molecular structure of water?
What is the term that describes water's ability to 'cling' to itself?
What is the term that describes water's ability to 'cling' to itself?
What property of water allows it to dissolve many substances?
What property of water allows it to dissolve many substances?
Which property of water contributes to its high surface tension?
Which property of water contributes to its high surface tension?
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How do cohesion and adhesion facilitate water transport in plants?
How do cohesion and adhesion facilitate water transport in plants?
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What type of bond holds the hydrogen and oxygen atoms within a water molecule?
What type of bond holds the hydrogen and oxygen atoms within a water molecule?
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What is the primary reason water has a high specific heat?
What is the primary reason water has a high specific heat?
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In terms of polarity, how is water described?
In terms of polarity, how is water described?
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What effect does surface tension have on the behavior of water?
What effect does surface tension have on the behavior of water?
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How does water's high specific heat capacity benefit organisms?
How does water's high specific heat capacity benefit organisms?
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What is the significance of water's high heat of vaporization?
What is the significance of water's high heat of vaporization?
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Why does ice float on water?
Why does ice float on water?
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What allows water to act as the universal solvent?
What allows water to act as the universal solvent?
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What property of water contributes to the stability of temperatures in coastal habitats?
What property of water contributes to the stability of temperatures in coastal habitats?
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What is the impact of water's cohesion on its behavior?
What is the impact of water's cohesion on its behavior?
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Which of the following examples illustrates the principle of evaporative cooling?
Which of the following examples illustrates the principle of evaporative cooling?
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Flashcards
Water's Molecular Structure
Water's Molecular Structure
Water is composed of one oxygen atom and two hydrogen atoms, linked by covalent bonds. The oxygen atom has a slightly negative charge, while the hydrogen atoms have a slightly positive charge, creating a polar molecule.
Cohesion
Cohesion
Cohesion is the attraction between water molecules due to hydrogen bonding, causing them to stick together.
Adhesion
Adhesion
Adhesion is the attraction between water molecules and other polar surfaces due to hydrogen bonding.
Capillary Action
Capillary Action
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Surface Tension
Surface Tension
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Polar Molecule
Polar Molecule
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Hydrogen Bond
Hydrogen Bond
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Universal Solvent
Universal Solvent
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Surface Tension of Water
Surface Tension of Water
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High Specific Heat Capacity of Water
High Specific Heat Capacity of Water
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High Heat of Vaporization
High Heat of Vaporization
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Water Density in Ice
Water Density in Ice
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Water as a Universal Solvent
Water as a Universal Solvent
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Solution
Solution
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Study Notes
Properties of Water
- Water is composed of one oxygen atom and two hydrogen atoms, bonded together by covalent bonds.
- Water is a polar molecule due to an unequal distribution of charge, with the oxygen side being slightly negative and the hydrogen side being slightly positive.
- The polarity of water molecules leads to hydrogen bonding between them.
- Hydrogen bonds are a weak attraction between the positive hydrogen of one water molecule and the negative oxygen of another.
- Covalent bonds hold the atoms within a water molecule together, while hydrogen bonds hold different water molecules together.
Cohesion and Adhesion
- Cohesion is the attraction between water molecules, causing them to stick together.
- Cohesion explains why water forms droplets, and contributes to surface tension.
- Adhesion is the attraction between water molecules and other polar molecules or surfaces.
- Adhesion is why water is able to stick to the sides of a glass or the surfaces of plants.
Capillary Action
- Capillary action is the combined effect of cohesion and adhesion; allowing water to move up narrow spaces against gravity.
- An example of this is the movement of water through plants.
Surface Tension
- Surface tension: caused by the strong cohesion of water molecules at the surface of a body of water.
- Surface tension creates a "film" on the water's surface, allowing some objects to float on it.
Specific Heat Capacity
- Water has a high specific heat capacity, meaning it can absorb a large amount of heat without a significant change in temperature.
- This property of water helps moderate temperatures in living organisms and environments.
- Water absorbs a lot of heat without a large change in temperature, therefore it helps keep a stable internal temperature.
Heat of Vaporization
- Water has a high heat of vaporization, meaning it takes a large amount of energy to change water from a liquid to a gas.
- Evaporative cooling is used by many organisms (like elephants) by spraying water on their bodies to help cool themselves.
Density of Ice
- Water expands when it freezes due to the way hydrogen bonds arrange themselves.
- This expansion makes ice less dense than liquid water, causing it to float.
- Ice forming on top of bodies of water insulates the water underneath, preventing the water below from freezing solid.
Water as a Universal Solvent
- Water is called the universal solvent because of its polarity.
- It can dissolve many different substances.
- Water's ability to dissolve substances makes it essential for many biological processes, and is involved in blood, cells and the movement of essential substances in the body.
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Description
Test your knowledge on the unique properties of water, including its molecular structure, cohesion, and adhesion. This quiz covers important concepts such as polarity and hydrogen bonding. Perfect for students studying chemistry or environmental science.
