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Chem 103 Exam 1 review - UW
Madison Questions with 100% Correct
Answers
What is an acid? Correct Answer: solution has an excess of H+ ions
What is a base? Correct Answer: solution has an excess of hydroxyl ions (OH-)
What is neutralization? Correct Answer: -process where acid and base are
mixed until they become neutral and the PH is 7.
What are the two products of a neutralization chemical reaction? Correct
Answer: water and salt ( The type of salt depends on acid or base added to
neutralize.)
What is a weak acid? Correct Answer: an acid that only partially ionizes in an
aqueous solution. This means that not every molecule breaks apart.
pH Correct Answer: is a measurement of how acidic or how basic a solution is.
Why is pH important to biology? Correct Answer: Cells survive in a specific pH
range.
Human blood is maintain at 7pH for homostasis.
The stomach has acids to break down food.
Bile from the liver is a base which breaks down fats & grease.
:
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What is a buffer? Correct Answer: a substance to help to neutralize/balance pH
levels.
What are pH indicators? Correct Answer: They are used to tell you the pH value.
Examples are phenalphelein and bromthymol blue.
What are the properties of an acid? Correct Answer: taste sour, conduct
electricity, corrosive, reacts with metals, turns litmus paper red.
Give examples of acids Correct Answer: HCL which is in your stomack.
Sulfuric acid which is used a lot in industries to make fertilzers, paints, etc.
Tums antacid used to neutralize stomach acids.
What are some uses of bases? Correct Answer: soaps and cleaning products
used in batteries
What are some examples of bases? Correct Answer: lye used to make soap.
Liquid plummer used for clogged drains. Baking Soda and Baking powder
What is the main neutral substance? Correct Answer: water
How is a salt chemically formed? Correct Answer: When you add acid or base
to neutralize a solution the products formed are water and salts.
A change in pH units represents a tenfold change in the acidity of the solution
(logarithmic scale). If one solution has a pH of 1 and a second solution has a pH
:
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,3
of 2, the first solution is not twice as acidic a the second it is ______times more
acidic. Correct Answer: ten (logarithmic)
What is a pH scale? Correct Answer: a logarithmic scale that indicates the pH of
a solution. It ranges from 0 - 14.
On the pH scale, what numbers represent an acid? Correct Answer: 0-6
On the pH scale, what numbers represent a base? Correct Answer: 8-14
On the pH scale, what number represents a neutral solution? Correct Answer: 7
What is a weak acid? Correct Answer: An acid that only partially ionizes (breaks
down) in a solution. Weak acids are close to 7pH
What is a weak base? Correct Answer: A weak base will only parttally ionize in a
solution. This means that not every molecule breaks apart.
What is a chemical change? Correct Answer: When a change in composition
occurs giving new substances with new properties.
Example when wood changes to carbon. Wood and carbon do not have
similar properties.
WHat is a physical change? Correct Answer: When a change does NOT change
the composition.
What are indicators of a chemical change? Correct Answer: Observations such
as what you see( color change, precipitant (solids in solutions)
Hear-boom Smell Taste-sour/sweet Feel-hot or cold.
:
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, 4
Also, bubbles indicate gas..
What is the law of conservation of mass? Correct Answer: Mass is not created
nor destroyed.
What is a chemical formula? Correct Answer: -chemical symbols represent
molecules with subscripts to represent the number of that element.
NaCl represents table salt.
Reactants are on the right or left of the -> (yield) sign in a chemical equation.
Correct Answer: left
Products are on the left or right of the ->(yield) sign in a chemical equation.
Correct Answer: right
What does the -> represent in a chemical equation? Correct Answer: yield or to
produce
What is a chemical equation? Correct Answer: It represents with chemical
formulas a chemical change/reaction.
When one molecule splits apart and switch places this is called a __ reaction.
Correct Answer: replacement type of chemical reaction
What is a reactant in a chemical equation? Correct Answer: They are
substances that are present before the chemical change takes place. They are
what you put into the chemical reaction to cause a chemical change.
What is a product in a chemical equation? Correct Answer: Chemicals that are
formed during the chemical change.
:
vPretest - Stuvia US
Chem 103 Exam 1 review - UW
Madison Questions with 100% Correct
Answers
What is an acid? Correct Answer: solution has an excess of H+ ions
What is a base? Correct Answer: solution has an excess of hydroxyl ions (OH-)
What is neutralization? Correct Answer: -process where acid and base are
mixed until they become neutral and the PH is 7.
What are the two products of a neutralization chemical reaction? Correct
Answer: water and salt ( The type of salt depends on acid or base added to
neutralize.)
What is a weak acid? Correct Answer: an acid that only partially ionizes in an
aqueous solution. This means that not every molecule breaks apart.
pH Correct Answer: is a measurement of how acidic or how basic a solution is.
Why is pH important to biology? Correct Answer: Cells survive in a specific pH
range.
Human blood is maintain at 7pH for homostasis.
The stomach has acids to break down food.
Bile from the liver is a base which breaks down fats & grease.
:
vPretest - Stuvia US
,2
What is a buffer? Correct Answer: a substance to help to neutralize/balance pH
levels.
What are pH indicators? Correct Answer: They are used to tell you the pH value.
Examples are phenalphelein and bromthymol blue.
What are the properties of an acid? Correct Answer: taste sour, conduct
electricity, corrosive, reacts with metals, turns litmus paper red.
Give examples of acids Correct Answer: HCL which is in your stomack.
Sulfuric acid which is used a lot in industries to make fertilzers, paints, etc.
Tums antacid used to neutralize stomach acids.
What are some uses of bases? Correct Answer: soaps and cleaning products
used in batteries
What are some examples of bases? Correct Answer: lye used to make soap.
Liquid plummer used for clogged drains. Baking Soda and Baking powder
What is the main neutral substance? Correct Answer: water
How is a salt chemically formed? Correct Answer: When you add acid or base
to neutralize a solution the products formed are water and salts.
A change in pH units represents a tenfold change in the acidity of the solution
(logarithmic scale). If one solution has a pH of 1 and a second solution has a pH
:
vPretest - Stuvia US
,3
of 2, the first solution is not twice as acidic a the second it is ______times more
acidic. Correct Answer: ten (logarithmic)
What is a pH scale? Correct Answer: a logarithmic scale that indicates the pH of
a solution. It ranges from 0 - 14.
On the pH scale, what numbers represent an acid? Correct Answer: 0-6
On the pH scale, what numbers represent a base? Correct Answer: 8-14
On the pH scale, what number represents a neutral solution? Correct Answer: 7
What is a weak acid? Correct Answer: An acid that only partially ionizes (breaks
down) in a solution. Weak acids are close to 7pH
What is a weak base? Correct Answer: A weak base will only parttally ionize in a
solution. This means that not every molecule breaks apart.
What is a chemical change? Correct Answer: When a change in composition
occurs giving new substances with new properties.
Example when wood changes to carbon. Wood and carbon do not have
similar properties.
WHat is a physical change? Correct Answer: When a change does NOT change
the composition.
What are indicators of a chemical change? Correct Answer: Observations such
as what you see( color change, precipitant (solids in solutions)
Hear-boom Smell Taste-sour/sweet Feel-hot or cold.
:
vPretest - Stuvia US
, 4
Also, bubbles indicate gas..
What is the law of conservation of mass? Correct Answer: Mass is not created
nor destroyed.
What is a chemical formula? Correct Answer: -chemical symbols represent
molecules with subscripts to represent the number of that element.
NaCl represents table salt.
Reactants are on the right or left of the -> (yield) sign in a chemical equation.
Correct Answer: left
Products are on the left or right of the ->(yield) sign in a chemical equation.
Correct Answer: right
What does the -> represent in a chemical equation? Correct Answer: yield or to
produce
What is a chemical equation? Correct Answer: It represents with chemical
formulas a chemical change/reaction.
When one molecule splits apart and switch places this is called a __ reaction.
Correct Answer: replacement type of chemical reaction
What is a reactant in a chemical equation? Correct Answer: They are
substances that are present before the chemical change takes place. They are
what you put into the chemical reaction to cause a chemical change.
What is a product in a chemical equation? Correct Answer: Chemicals that are
formed during the chemical change.
:
vPretest - Stuvia US
