Water Flashcards

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1
Q

Name 5 properties of water:

A
  1. Good metabolite.
  2. Good solvent
  3. Buffers temp change with relatively high specific heat capacity.
  4. Relatively large latent heat of vaporisation for efficient cooling effect.
  5. Strong cohesion
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2
Q

What makes water polar?

A

Shared negative hydrogen electrons are pulled towards oxygen, left with slight positive charge. Unshared electrons on oxygen gives it a slight negative charge.

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3
Q

What are hydrogen bonds?

A

Weak bonds between a slightly positively charged hydrogen atom in one molecule and a slightly negatively charged atom in another molecule.

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4
Q

Why is it important for water to be a good metabolite?

A

Because many metabolic reactions involve condensation and hydrolysis reactions which require water or release water.

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5
Q

Why is water a good solvent?

A

Because it is polar it can surround ions and they’ll dissolve which means living organisms can take up useful substances which can be transported around the body.

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6
Q

What does a high latent heat of vaporisation mean?

A

Allows organisms to cool down without losing too much water.

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7
Q

Why does water have a high specific heat of capacity?

A

Hydrogen bonds. Means water doesn’t experience rapid heat changes, maintaining a stable internal environment and habitat.

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8
Q

What is cohesion?

A

Attraction between same type of molecules. Helps make water flow. Water has a high surface tension.

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