Free Printable Properties of Water

Worksheets

Properties of Water

Total questions: 17

Worksheet time: 11mins

Name

Class

Date

A hydrogen bond is ...

a bond between 2 hydrogen atoms

a bond between a hydrogen atom and another atom

a bond between a partially (-) H atom on one molecule and a (+) atom on another molecule

a bond between a partially (+) H atom on one molecule and a (-) atom on another molecule

Water is polar because ...

the oxygen can pull harder on the shared electrons than the hydrogen can

the hydrogen can pull harder on the shared electrons than the oxygen can

the oxygen atom exchanges electrons with the 2 hydrogen atoms

hydrogen atoms can pull harder on protons than oxygen atoms can

Alcohol is a very polar molecule.

True

False

Polar molecules are molecules that ...

have positive and negative charges

are neutral (no charges)

have opposite charges on opposite ends

have an even distribution of charge

The line that indicates where a hydrogen bond is line ...

This molecule is __________ because ____________.

polar; it has charged areas

not polar; the charges aren't on opposite sides

polar; the charges are opposite

not polar; it doesn't have like charges

Because water has a high heat capacity it ...

moderates our climate

allows fish and amphibians to live at the bottom of a lake or stream in the winter

allows water to move up to the top of a tree

dissolves charged particles well

A water molecule has ...

a partially (-) O and 2 partially (+) H's

2 partially (+) O's and 1 partially (-) H

1 partially (+) O and 2 partially (-) H's

2 fully charged (-) H's and 1 fully (+) O

This reaction would be _____________ because ______________.

endergonic; activation energy is high

exergonic; activation energy is low

endergonic; ∇G is positive

exergonic; ∇G is negative

10.

Water striders (small bugs) can walk across the surface of calm water. Their feet push the surface of the water down slightly, but they do not break the surface. Why?

The insects are light enough so they do not break the hydrogen bonds holding the water molecules together

The insects actually use their wings to hover slightly above the water’s surface and they only skim it with their feet.

The insect’s feet are non-polar, so they are repelled by the polar water molecules and are pushed away from the water’s surface.

The insects are small enough to see the individual water molecules, so they are able to step carefully from one molecule to the next

11.

What word describes the ability of a substance to be attracted to a different substance?

cohesion

adhesion

capillary action

surface tension

12.

Why does water move from the roots to the leaves of plants?

Water is pushed by solutes

Capillary action pulls the water molecules like a chain

Water is pulled by gravity

Water’s cohesion causes it to “pull” towards the leaves

13.

Which is NOT a unique property of water?

Frozen water floats on liquid water.

Water covers most of the Earth’s surface and retains a large amount of heat.

Water molecules stick to each other through hydrogen bonds.

Water cools very rapidly.

14.

Why does ice float?

As water freezes, it expands and its density decreases.

As water freezes, it takes up more hydrogen from the atmosphere, causing it to have a greater buoyancy.

As water freezes, air becomes trapped between the hydrogen bonds of water molecules.

As water freezes, it takes up more oxygen from the atmosphere, causing it to have a greater buoyancy.

15.

How many hydrogen atoms are in a water molecule?

16.

Which types of compounds dissolve easily in water?

Polar and Nonpolar

Polar and Ionic

Nonpolar and Ionic

Covalent and Nonpolar

17.

The bond that holds the Oxygen and Hydrogen atoms together in a water molecule is a ________ bond.

ionic

Hydrogen

Covalent

Weak

Reset

Properties of Water

Total questions: 17

Worksheet time: 11mins

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