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Bio 1406-021! Chapter 3: Water Flashcards | StudBud
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Bio 1406-021! Chapter 3: Water
Bio 1406-021! Chapter 3: Water
30 terms
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A #biology quiz to introduce the basics of water
Flashcards
30 cards
F
Practice quiz
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Host live
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Questions
30
Answers
1
What is considered neutral on a pH scale
7
8
6
5
2
What is the ability of a compound to transition directly from a solid to a gas?
Sublimation
Deposition
Freezing
Specific heat
3
In a glass of sugared iced tea, what is the solvent?
Ice
Sugar
Water
The tea
4
Electrons are pulled toward ___ in Hydrogen bonds
Oxygen
Hydrogen
Water
Atoms
5
Which of the Following is hydrophobic?
Wax
Pasta
Sugar
Paper
6
Is water polar or non-polar?
Non-polar
Polar
7
Water is organic.
False
True
8
What is molarity?
The substance that is doing the dissolving
The substance being dissolved
The amount of solute per liter of solvent
High water affinity
9
What is a substance being dissolved?
Aqueous solution
Molarity
Solvent
Solute
10
Water's high specific heat helps regulate air temperature in coastal areas.
False
True
11
All of these are properties of water, except
Adhesive behavior
Expansion upon freezing
Versatile solvent
Ability to moderate temperature
12
In an Acidic solution, [H+] is __, and pH is __
Increasing; decreasing
Decreasing; increasing
Increasing; increasing
Decreasing; decreasing
13
An acid is a substance that ___.
Farms covalent bonds
Increase hydrogen ion concentration
Contains hydrogen
Is a versatile solvent
14
In order to survive, cells must remain close to what pH?
4
2
7
8
15
Alkaline solutions are
Acidic
Basic
Neither
16
A pH of 2 is __
Acidic
Basic
17
Which of the following best associates with the Cohesion of water molecules?
Surface tension
A calorie
Heat of vaporization
Specific heat
18
A ___ minimizes change in pH by adjusting [H+]
Covalent bond
Buffer
Alkaline solution
Hydrogen bond
19
Hydrogen bonds are much weaker than Covalent bonds
False
True
20
Amount of energy that must be gained or lost, to change the temperature of 1g of water by 1C is
1 kilocalorie
1000 joules
1 calorie
1000 calories
21
At a temperature of 0 C, water freezes. At this temperature, water is in its most dense state.
True
False
22
What is the measure of how difficult it is to stretch and break the surface of a liquid?
High specific heat
High surface tension
Expansion upon freezing
Heat of vaporization
23
Since organisms are made primarily of water, they resist rapid temp. change, from water’s __.
High specific heat
Buffering activity
Lower density
Cohesion
24
Which of the following best describes a pH
The concentration of H+ ions (protons)
Energy that is added to a substance to convert it into a gas
Thermal energy being transferred by between objects
A substance being dissolved
25
A base is a ___
Proton donor
Proton acceptor
26
Water is attracted to other water by weak chemical bonds known as __.
Ionic bonds
Hydrogen bonds
Covalent bonds
Polar bonds
27
A pH of 8 is __.
Basic
Acidic
28
Which property of water allows dogs to cool themselves, by panting?
The formation of covalent bonds between water molecules
Water’s high heat of vaporization
Water's high surface tension
29
Water has __ hydrogen atoms and __ oxygen atoms
2;1
1;2
1;0
1;1
30
Which property of water allows a paper towel to pick up water?
Cohesion
Adhesion
Surface tension
Vaporization