Font size
WorksheetsBIO122 CHAPTER 3
Total questions: 55
Worksheet time: 38mins
There are partial charges within a water molecule which cause water to have special properties. This makes water a ________ molecule.
Polar
Nonpolar
Hydrophobic
Ionic
When water rises up a thin straw or moves up a tree from the roots to the leaves, it is called _____________.
Capillary Action
Surface Tension
Heat of Vaporization
Density of Water
Water is liquid at room temperature and takes a lot of energy (heat) to reach the boiling point and turn to a vapor. What is this called?
Heat of Vaporization
Cohesion
Heat of Fusion
Surface Tension
Very light insects can sit on top of water because of
Water's High Heat of Vaporization
Surface Tension
Water's High Specific Heat
Capillary Action
Why does ice float?
As water freezes, the molecules move farther apart (expands) and the density decreases.
As water freezes, the hydrogen bonds mix with air and create buoyancy.
As water freezes, the bonds break, making it float.
As water freezes, the molecules move closer together, causing the density to increase.
What makes water a universal solvent?
It is a polar molecule that can form hydrogen bonds, allowing it to dissolve many substances.
It is a nonpolar molecule that can form hydrogen bonds, allowing it to dissolve many substances.
It is a polar molecule with a low specific heat, allowing it to dissolve many substances.
It is a nonpolar molecule with a low specific heat, allowing it to dissolve many substances.
When it rains, water will stick to your clothes and get them wet. What property is this an example of?
Cohesion
Adhesion
High Specific Heat Capacity
Surface Tension
What property allows water molecules to stick to each other to form drops?
Cohesion
Adhesion
Surface Tension
Capillary Action
Why is it important that water has a high heat of vaporization and high specific heat capacity?
If they were lower, water would change temperatures and evaporate much faster.
If they were lower, there would be too much water on the Earth.
The properties allow for the rapid change of temperature and vaporization of water.
These properties allow water to freeze at high temperatures.
The fact that water can stick to other substances is called:
Ph
Adhesion
Cohesion
Insulation
True or False: Hydrogen bonds are very weak, which allows for many of the chemical characteristics found in water.
True
False
What property of water allows for water to act as a temperature regulator for the world?
Cohesive Behavior
Expansion Upon Freezing
High Specific Heat
Universal Solvent
This individual is ice fishing. They cut through the top layers of ice to reach the water and fish below. What property of water allows for this to happen?
Expansion Upon Freezing
Universal Solvent
Ability to Moderate Temperature
Cohesive Behavior
What property of water results in the accumulation of small amounts of water into larger amounts of water? The results in the rivers, lakes, streams, and even the oceans.
Cohesive Behavior
Expansion Upon Freezing
Ability to Moderate Temperature
Universal Solvent
What property of water causes these Alka-Seltzer tablets to dissolve?
Universal Solvent
Expansion Upon Freezing
Cohesive Behavior
High Specific Heat
Sweating is an example of what property of water?
Ability to Moderate Temperature
Expansion Upon Freezing
Cohesive Behavior
Universal Solvent
Blood functions as a transport mechanism to take nutrients and oxygen to all cells in the body. What property of water allows for this to occur?
Expansion Upon Freezing
Universal Solvent
Cohesive Behavior
Ability to Moderate Temperature
Trees must pull water up their trunks from the roots. What property of water allows trees to pull against gravity?
cohesion
adhesion
universal solvent
high specific heat
Oceans do not freeze in winter due to which property of water?
cohesion
adhesion
universal solvent
high specific heat
When adding sugar to water,
Water is the solute, sugar is the solvent, together they are a mixture
Water is the solution, sugar is the solute, together they are a solution
Water is the solvent, sugar is the solute, together they are a solution
Water is the mixture, sugar is the solution, together they are a solvent
Atoms in molecules share pairs of electrons when they form
covalent bonds.
ionic bonds.
hydrogen bonds.
polymers.
Water carries out all the following functions in life, except as a
cooling agent
source of carbon
universal solvent.
insulator
2. Lakes only freeze on the surface because
water has high surface tension
water can act as solvent
water has low viscosity
ice is less dense than water
Water is polar because...
The unequal distribution of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms.
The molecule has two poles, at which the it is colder than other regions of the molecule.
The unequal sharing of electrons gives the water molecule a slight negative charge near its hydrogen atoms and a slight positive charge near its oxygen atom.
The water molecule is neutral.
Which biological process uses the latent heat of vaporization of water?
cooling of body through sweating
stabilize ocean temperature
act as universal solvent
ice float act as insulator
Has more H+ ions than OH- ions
Acid
Neutral
Base
Has equal amounts of OH- and H+ ions
Acid
Neutral
Base
In the Bronsted-Lowry definition of acids and bases, an acid is
A prton acceptor
A proton donor
corrodes metals
Forms hydrogen ions in water
In the bronsted-lowry definition of acids and bases, a base
forms hroxide ions
is a proton acceptor
is a proton donor
forms hydrogen bonds
Black coffee has a pH of 5. It is a ________ ____________
Weak
Strong
Acid
Base
The table shows the pH of several solutions. Which solution is the most acidic?
vinegar
milk
water
bleach
Four substances were tested for pH, lemon juice (pH 2), baking soda (pH 9), bleach (pH 12), and milk (pH 6). Which of the following correctly lists the substances from most basic to acidic?
lemon juice, milk, baking soda, bleach
bleach, baking soda, milk, lemon juice
milk, lemon juice, baking soda, bleach
baking soda, bleach, lemon juice, milk
Which statement is true?
the higher the pH, the stronger the acid
the lower the pH, the more neutral the acid
the higher the pH, the weaker the alkali
the lower the pH, the stronger the acid
A base is a substance
That releases OH- ions when dissolved in water
That releases H+ ions when dissolved in water
Does not release any ions when dissolved in water
None of the above
An acid
is a substance that releases H+ ions when dissolved in water
is a substance that does not release any ions when dissolved in water
is a substance that releases OH- when dissolved in water
releases an equal amount of OH- and H+ ions when dissolved in water
What might happen if buffers did not exist within the human body?
Our blood and other bodily fluids might become too acidic or basic.
Our stomach acid would not be able to break down food.
We would not be able to process glucose within our cells.
We would not be able to inhale oxygen into our lungs.
Two beakers have liquids in them. When you add a base such as ammonia to beaker 1, the pH did not change. But when you add ammonia to beaker 2, the pH changes drastically. Choose the best explanation.
Beaker 1 had only water and Beaker 2 contained a buffer.
Beaker 1 contained a buffer and Beaker 2 contained only water.
Beaker 2 contained an acid.
The beaker that changed pH contained a buffer.
What does pH measure?
strength of an acid
strength of a base
strength of both acids and bases
concentration of H+ ions
