WorksheetsUnit 4 Review
Total questions: 64
Worksheet time: 32mins
Which of the following is the strongest acid?
pH 1
pH 5
pH 3
pH 8
Which of the following is the strongest base?
pH 4
pH 14
pH 7
pH 15
Which of the following is a characteristic of a base?
bitter
sour
corrosive
releases hydrogen ions in water
Which of the following is a characteristic of an acid?
bitter
slippery
sour
releases hydroxide ions in water
What does a base release when placed in water?
hydroxide ions ( OH− )
hydrogen ions ( H+ )
ions
molecules
What does an acid release when placed in water?
hydroxide ions ( OH− )
hydrogen ions ( H+ )
ions
nothing
A substance with a pH of 8 is...
a weak base
a weak acid
a strong base
a strong acid
An acid can be corrosive.
True
False
Which pH has the most hydrogen ions ( H+ )?
pH 2
pH 7
pH 10
pH 13
A substance with a pH of 7 is which of the following?
acid
base
neutral
A substance with a pH of 5 is which of the following?
acid
base
neutral
A substance with a pH of 11 is which of the following?
acid
base
neutral
Match the following
Ca(OH)2
Calcium Hydroxide
H2SO4
Sulfuric Acid
HCl
Hydrochloric Acid
HNO3
Nitric Acid
NaOH
Sodium Hydroxide
Sort the properties of Acids and Bases.
Sour taste
Acid
Bitter taste
Base
Releases H+ ions
Acid
Releases OH− ions
Base
pH < 7
Acid
Which of the following are properties of acids?
They conduct electricity when dissolved in water
They taste sour
They react with metals to produce hydrogen gas
All of the answer choices are correct
Which of the following is a base?
baking soda in water
orange juice
vinegar
lemonade
If an acid is combined with a base of equal strength, the result will most likely be
a neutral solution.
a stronger acid.
impossible to tell without testing the pH.
a stronger base
Which of the following are acids?
Lemon Juice
Tomato Juice
Black Coffee
Bleach
Baking Soda
Organize these options into the right categories. Which of the following are bases? Options to consider: Bleach, Hand Soap, Baking Soda, Egg, Pure Water.
Bleach
Hand Soap
Baking Soda
Egg
Pure Water
A student tests an unknown aqueous solution and finds it conducts electricity and turns litmus paper blue. What can the student infer?
The solution contains an acid.
The solution contains a base.
The solution is neutral.
Label the following equation by matching each substance to its role (Acid, Base, Salt, Water): HCl + NaOH → NaCl + H2O
HCl
Acid
NaOH
Base
NaCl
Salt
H2O
Water
Label the following equation by matching each substance to its role (Acid, Base, Salt, Water): 2HNO3 + Ca(OH)2 → Ca(NO3)2 + 2H2O
HNO3
Acid
Ca(OH)2
Base
Ca(NO3)2
Salt
H2O
Water
Attraction between molecules of the same substance is known as (a) ____ and the attraction between the molecules of different substances is known as (b) ____.
(a) cohesion; (b) adhesion
(a) adhesion; (b) cohesion
(a) hydrogen bond; (b) covalent bond
(a) surface tension; (b) buffer
Substance that is dissolved in a solution.
Base
Solute
Solvent
Suspension
A solution with a pH less than 7 (high H+ concentration).
pH scale
Base
Acid
Buffer
A solution with a pH more than 7 (high OH− concentration).
Acid
Buffer
Hydrogen bond
Base
The oxygen atom in a water molecule is slightly ____.
negative
positive
Water is a universal solvent because it...
can be found anywhere
freezes when it gets cold
floats when frozen
dissolves most substances
The tightness across the surface of water that enables paper clips to float is _____.
adhesion
capillary action
surface tension
polarity
Water molecules are polar molecules. What is meant by the term polar molecule?
a molecule that has no charge on one end and either an overall negative or positive charge on the other end
a molecule that has an overall positive charge on one end, as well as an overall positive charge on the other end
a molecule that has an overall negative charge on one end, as well as an overall negative charge on the other end
a molecule that has an overall positive charge on one end and an overall negative charge on the other end
Which property of water allows it to form spherical droplets when in liquid form?
adhesion
cohesion
specific heat
nature as a solvent
A water molecule contains two hydrogen atoms and one oxygen atom. Which of the following statements about water molecules is true?
The oxygen atom is negatively charged and the hydrogen atoms are positively charged.
The oxygen atom is positively charged and the hydrogen atoms are negatively charged.
All of the atoms have a negative charge.
All of the atoms have a positive charge.
_____ is the energy needed to heat one gram of a substance by 1°C.
specific heat
specific temperature
universal solvent
adhesion
What is the attractive force between two bodies of different substances that are in contact with each other? This is the property of a water molecule that allows it to stick to other substances.
adhesion
cohesion
specific heat
universal solvent
Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature. What is the reason for this phenomenon?
Water is an acid.
Water is a versatile solvent.
Water has a high specific heat.
Water acts as a buffer.
Capillary action is the result of
adhesion
cohesion
change in matter (heat of fusion)
both adhesion and cohesion
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.
What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"
Purity
Polarity
High heat capacity
Expansion upon freezing
Which end of the water molecule has a slightly positive charge?
the oxygen end
the hydrogen end
both ends are slightly positive
neither end is positive
Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?
Water expands as it freezes.
Water is an excellent solvent.
Water exhibits capillary action.
Water is able to moderate temperature.
Water has very high specific heat. What might happen if water had low specific heat instead?
Flooding would occur and animals would be forced to migrate.
Harmful organisms living in water would reproduce at a rapid rate.
Organisms that are sensitive to changes in temperature would die.
Plants would not have enough water to effectively carry out photosynthesis.
Attractions between water molecules are called
Covalent bonds
Ionic bonds
Polar bonds
Hydrogen bonds
A high specific heat means...
It heats up quickly with energy added
It requires more energy to change temperature
Which of the following best explains why the sand at the beach is hotter than the water?
Sand has a higher specific heat than water, requiring more energy to heat up than water.
Sand has a lower specific heat than water, requiring less energy to heat up than water.
Sand has a greater mass than water.
Water has a greater mass than sand.
Match the following.
shows capillarity
moves up thin tubes without using energy
universal solvent
dissolves MANY things
adhesion
sticking to other substances
high heat capacity
doesn't change temp. quickly
Which of the following is LEAST likely to dissolve in water?
nonpolar fats and oils
polar sugar molecules
salt made of a positive sodium ion and a negative chloride ion
all of the substances will dissolve easily in water
As you added drops to the coins, each drop stuck to the other water because of ________________.
adhesion
cohesion
capillary action
specific heat
Gojo spilled a glass of water. When he laid down a paper towel, the water immediately soaked into the paper towel. Which property was responsible?
Cohesion
Adhesion
Surface tension
Spongebob is baking a cake and notices water droplets forming on the outside of the cup. What is causing the water droplets to stick to the cup?
cohesion
adhesion
surface tension
Why do some insects, like water striders, walk on water?
They push the water down
They are very light
Cohesion and surface tension create a supportive layer
Which of the following best describes the effect of surface tension?
It creates a "skin" on the surface of water
It allows large objects to sink easily
It prevents small insects from walking on water
Hydrogen bonding, where the positive ends of water molecules attract the negative ends of other water molecules, cause....
water molecules to repel each other
water molecules to stick together
water molecules to spread out
water molecules to change state easily
Label the following equation: 2HNO3 + Ca(OH)2 -> Ca(NO3)2 + 2H2O. Match each substance to its label: Acid, Base, Salt, Water.
2HNO3
Acid
Ca(OH)2
Base
Ca(NO3)2
Salt
2H2O
Water
Label the following equation: HCl + NaOH -> NaCl + H2O.
Match each substance to its label: Acid, Base, Salt, Water.
HCl
Acid
NaOH
Base
NaCl
Salt
H2O
Water
A student tests an unknown aqueous solution and finds it conducts electricity and turns litmus paper blue. What can the student infer?
The solution contains an acid.
The solution contains a base.
The solution is neutral.
Organize these options into the right categories. Categorize each item as Acid, Base, or Neutral.
Pure Water
Neutral
Bleach
Base
Tomato Juice
Acid
Lemon Juice
Acid
Baking Soda
Base
Which of the following are properties of acids?
They conduct electricity when dissolved in water
They taste sour
They react with metals to produce hydrogen gas
All of the answer choices are correct
A substance with a pH of 11 is which of the following?
acid
base
neutral
A substance with a pH of 7 is which of the following?
acid
base
neutral
Which pH has the most hydrogen ions ( H+ )?
pH 2
pH 7
pH 10
Attraction between molecules of the same substance is known as _____
Buffer
Surface Tension
Hydrogen Bond
Cohesion
Adhesion
The attraction between the molecules of different substances is known as _____. Choose from: Buffer, Surface Tension, Hydrogen Bond, Cohesion, Adhesion, Covalent Bond.
Buffer
Surface Tension
Hydrogen Bond
Cohesion
Adhesion
The oxygen atom in a water molecule is slightly ____.
negative
positive
Water is a universal solvent because it...
It can be found anywhere
It freezes when it gets cold
floats when frozen
Dissolves most substances
