Water + pH Flashcards

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1
Q

What makes water a polar molecule?

A

The unequal distribution of charges between the oxygen atom and hydrogen atoms.

The oxygen atom has a slightly negative charge, and the hydrogen atoms have a slightly positive charge.

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2
Q

Explain how hydrogen bonds form between water molecules.

A

An oxygen atom from one water molecule attracts a hydrogen atom from another. The attraction creates a hydrogen bond.

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3
Q

Cohesion

A

The attraction between molecules of the same substance

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4
Q

Adhesion

A

The attraction between molecules of different substances

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5
Q

Explain why insects in the pond can walk on water.

A

Insects can walk on water because of surface tension. Surface tension is the cohesion of water molecules on the surface of a body of water.

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6
Q

Explain how cohesion and adhesion allow capillary action to occur in plants.

A

Adhesion happens between the water molecules and xylem walls to go up. Cohesion keeps the water molecules together.

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7
Q

Capillary Action

A

The act of cohesion and adhesion working together.

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8
Q

Suspension

A

A suspension is a mixture where things aren’t distributed evenly, and there are chunks “suspended”

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9
Q

Solution

A

A solution is a mixture where everything is distributed evenly and dissolved.

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10
Q

Why might water be considered the universal solvent?

A

Water is considered to be the universal solvent because of its polarity. It can dissolve many solutes, and some other solvents

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11
Q

How is blood both a solution and a suspension?

A

Blood is a solution because it has many different molecules mixed evenly. It is also a suspension because there are things like cells.

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12
Q

Define pH scale

A

The pH scale is a tool to measure the amount of hydrogen atoms in a solution.

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13
Q

Acidic Solution

A

Acidic solutions have more hydrogen (H+) atoms and less hydroxide (OH-) atoms

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14
Q

Basic Solution

A

Basic solutions have less hydrogen (H+) atoms and more hydroxide (OH-) atoms

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15
Q

What property of water allows for fish in a pond to survive during cold weather?

A

Density

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16
Q

Heat Capacity

A

The maximum amount of heat energy something can absorb before it changes temperatures.

17
Q

Solvent

A

a substance that dissolves solutes

18
Q

Solute

A

a substance that gets dissolved in a solvent

19
Q

What type of bond holds the hydrogen atoms to the oxygen atom within an individual water molecule?

A

Polar covalent bonds