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26 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is the first function of water? |
Biochemical reactions require an aqueous environment. |
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What is the second important function of water? |
It is important for means of transportation. |
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What is the third important function of water? |
It is resistant to temperature change. |
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How much of the human body is made up of water? |
55 to 60 percent |
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If there are no partial charges, what can no longer happen? |
There is no chance of hydrogen bonds |
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________ molecules are soluble in water. |
Polar |
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________ molecules are insoluble in water. |
Nonpolar |
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What does hydrophilic mean? |
Water loving |
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What does hydrophobic mean? |
Water fearing |
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Can molecules be both hydrophilic and hydrophobic at the same time? |
Yes |
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Brönsted-Lowry is all about what? |
Protons |
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Acid ________ protons. |
Donates |
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Base ________ protons. |
Accepts |
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pH = 7.0 is… |
Neutral |
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What kind of molecule is water? |
Polar |
Polar or nonpolar |
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pH < 7.0 is… |
Acidic |
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pH > 7.0 is… |
Basic |
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A 1 unit change in pH equals what? |
A 10 fold change in H+ concentration. |
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What kind of bonds hold water together? |
Covalent |
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Why is water considered to use covalent bonds? |
The bonds share electrons |
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Which atom has more electronegativity: oxygen or hydrogen? |
Oxygen |
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If oxygen is negatively charged and hydrogen is positively charged, what would this cause? |
Partial charge |
Water is polar |
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What are hydrogen bonds? |
The attraction between a beta positive charged Hydrogen and an atom with beta negative charge. |
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How many hydrogen bonds can one water molecule form? |
4 |
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What does hydrogen bonding allow? |
It allows water to be a liquid at room temperature |
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Why can’t two methane molecules create a hydrogen bond? |
Because they are not polar. |
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