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WorksheetsWater & pH
Total questions: 60
Worksheet time: 30mins
A single water molecule is held together by:
an H-bond.
an ionic bond.
a covalent bond.
Multiple water molecules are held together by:
covalent bonds.
ionic bonds.
hydrogen bonds.
When water sticks to other polar substances, it is known as
adhesion
cohesion
transpiration
surface tension
When water is attracted to other water molecules, it is known as
capillary action
surface tension
adhesion
cohesion
When water molecules at the surface of a liquid pull together to form a tight film of liquid, it is known as:
cohesion
adhesion
surface tension
polarity
Why is water a polar molecule?
The oxygen and hydrogen molecules share electrons equally.
The oxygen and hydrogen molecules do NOT share electrons equally.
The oxygen atom transfers electrons to the hydrogens.
The hydrogen atoms transfer electrons to the oxygen atom.
Due to water's polarity, the oxygen atom in the water molecule is slightly
positive
negative
Water has the ability to dissolve many polar substances. Which property of water is being described?
Water is less dense as a solid.
Water is the universal solvent.
Water has a high specific heat.
Water has surface tension.
A neutral has a pH of:
0
5
7
14
What is the pH range of an acid?
0-6.9
0-5
7.1-14
5-10
What is the pH range of basic solutions?
0-10
7 only
0-6.9
7.1-14
Orange juice has a pH of 4.5. What is orange juice classified as?
acid
base
neutral
Tap water has a pH of 7. Tap water is:
an acid.
a neutral.
a base.
Which of the following solutions is the strongest acid?
Tomato juice (pH 4.0)
Stomach acid (pH 1.0)
Baking soda (pH 9.0)
Drain cleaner (pH 14.0)
Which of the following solutions is the weakest base?
Sea water (pH 8.0)
Soda (pH 3.5)
Coffee (pH 5.0)
Detergent (pH 10.5)
Which of the following solutions has the greatest amount of hydrogen ions (H+)?
Acid rain (pH 5.5)
Hydrochloric acid (pH 0)
Toothpaste (pH 9.0)
Bleach (pH 13.0)
Which of the following solution has the greatest amount of hyroxide ions (OH-)?
Glass cleaner (pH 11.5)
Water (pH 7.0)
Vinegar (pH 2.0)
Apple juice (pH 4.0)
Which of the following solutions has an equal amount of H+ and OH- ions?
Lemon juice (pH 2.0)
Pure water (pH 7.0)
Hand soap (pH 10.0)
Drain cleaner (pH 14.0)
What is cohesion?
The ability of a molecule to "stick" to itself
The ability of a molecule to "stick" to other molecules
Large amounts of energy are required to change the temperature of a substance
A well-organized and efficient team
True or False: Hydrogen bonds are very weak, which allows for many of the chemical characteristics found in water.
True
False
What is the chemical symbol of water?
H2O
CO2
O2
N2
What about the chemical structure of water causes many of the critical properties that support life on Earth?
Hydrogen Bonds
Cohesive behavior
Polarity
Expansion Upon Freezing
What do the green bonds represent?
Covalent Bond
Hydrogen Bond
Ionic Bond
What characteristic is shown in the image?
Polarity
Hydrogen Bonds
Cohesion
Adhesion
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
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 allows for water to act as a temperature regulator for the world?
Cohesive Behavior
Expansion Upon Freezing
High Specific Heat
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
How does the concentration of hydrogen ions compare to the concentration of hydroxide ions if a solution has a pH of 7?
H>OH
OH>H
H= OH
Which list of pHs are in order of increasing H+ ions?
6, 9, 12
9, 12, 6
12, 9, 6
9, 6, 12
What is pH a measure of?
Density
Mass
Hydrogen Ion Concentraion
Polarity
Which of the following pH values represents the greatest concentration of H+ ions?
3
6
9
1
Which of the following pH values represents the greatest concentration of -OH ions?
3
6
9
1
On the pH scale, an acid is a compound that produces a solution with a pH (a) 7.
On the pH scale, a base is a compound that produces a solution with a pH (a) 7.
What pH does a neutral substance have?
5
6
7
8
Which of the following is the weakest acid?
bananas (pH 5)
tomatoes (pH 4)
cheese (pH 6)
orange juice (pH 3)
What is pH a measure of?
Density
Mass
Hydrogen Ion Concentraion
Polarity
Which of the following pH values represents the greatest concentration of -OH ions?
3
6
9
1
Which of the following pH values represents the greatest concentration of H+ ions?
3
6
9
1
The purpose of a buffer is to ___________.
Neutralize an acid or base and maintain pH.
Make your car's new wax look shiny.
Add volume to your hair.
All of the above.
When substances like salt and water dissolve, it is called the ______.
Solvent
Solution
Solute
A general word equation for the above is: solute + _______ = solution.
Solvent
Solute
Solution
