PORTAGE LEARNING CHEM 103 MODULES
1 TO 6 EXAM PRACTICE TEST 2026 TESTED
QUESTIONS WITH VERIFIED ANSWERS
GRADED A+
⩥ What is a base? Answer: solution has an excess of hydroxyl ions (OH-
)
⩥ What is neutralization? 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?
Answer: water and salt ( The type of salt depends on acid or base added
to neutralize.)
⩥ What is a weak acid? Answer: an acid that only partially ionizes in an
aqueous solution. This means that not every molecule breaks apart.
⩥ pH Answer: is a measurement of how acidic or how basic a solution
is.
⩥ Why is pH important to biology? 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.
⩥ What is a buffer? Answer: a substance to help to neutralize/balance
pH levels.
⩥ What are pH indicators? Answer: They are used to tell you the pH
value.
Examples are phenalphelein and bromthymol blue.
⩥ What are the properties of an acid? Answer: taste sour, conduct
electricity, corrosive, reacts with metals, turns litmus paper red.
⩥ Give examples of acids 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? Answer: soaps and cleaning products
used in batteries
⩥ What are some examples of bases? Answer: lye used to make soap.
,Liquid plummer used for clogged drains. Baking Soda and Baking
powder
⩥ What is the main neutral substance? Answer: water
⩥ How is a salt chemically formed? 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 of 2, the first solution is not twice as acidic a the
second it is ______times more acidic. Answer: ten (logarithmic)
⩥ What is a pH scale? 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? Answer: 0-6
⩥ On the pH scale, what numbers represent a base? Answer: 8-14
⩥ On the pH scale, what number represents a neutral solution? Answer:
7
, ⩥ What is a weak acid? Answer: An acid that only partially ionizes
(breaks down) in a solution. Weak acids are close to 7pH
⩥ What is a weak base? Answer: A weak base will only parttally ionize
in a solution. This means that not every molecule breaks apart.
⩥ What is a chemical change? 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? Answer: When a change does NOT
change the composition.
⩥ What are indicators of a chemical change? Answer: Observations such
as what you see( color change, precipitant (solids in solutions)
Hear-boom Smell Taste-sour/sweet Feel-hot or cold.
Also, bubbles indicate gas..
⩥ What is the law of conservation of mass? Answer: Mass is not created
nor destroyed.
⩥ What is a chemical formula? Answer: -chemical symbols represent
molecules with subscripts to represent the number of that element.
1 TO 6 EXAM PRACTICE TEST 2026 TESTED
QUESTIONS WITH VERIFIED ANSWERS
GRADED A+
⩥ What is a base? Answer: solution has an excess of hydroxyl ions (OH-
)
⩥ What is neutralization? 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?
Answer: water and salt ( The type of salt depends on acid or base added
to neutralize.)
⩥ What is a weak acid? Answer: an acid that only partially ionizes in an
aqueous solution. This means that not every molecule breaks apart.
⩥ pH Answer: is a measurement of how acidic or how basic a solution
is.
⩥ Why is pH important to biology? 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.
⩥ What is a buffer? Answer: a substance to help to neutralize/balance
pH levels.
⩥ What are pH indicators? Answer: They are used to tell you the pH
value.
Examples are phenalphelein and bromthymol blue.
⩥ What are the properties of an acid? Answer: taste sour, conduct
electricity, corrosive, reacts with metals, turns litmus paper red.
⩥ Give examples of acids 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? Answer: soaps and cleaning products
used in batteries
⩥ What are some examples of bases? Answer: lye used to make soap.
,Liquid plummer used for clogged drains. Baking Soda and Baking
powder
⩥ What is the main neutral substance? Answer: water
⩥ How is a salt chemically formed? 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 of 2, the first solution is not twice as acidic a the
second it is ______times more acidic. Answer: ten (logarithmic)
⩥ What is a pH scale? 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? Answer: 0-6
⩥ On the pH scale, what numbers represent a base? Answer: 8-14
⩥ On the pH scale, what number represents a neutral solution? Answer:
7
, ⩥ What is a weak acid? Answer: An acid that only partially ionizes
(breaks down) in a solution. Weak acids are close to 7pH
⩥ What is a weak base? Answer: A weak base will only parttally ionize
in a solution. This means that not every molecule breaks apart.
⩥ What is a chemical change? 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? Answer: When a change does NOT
change the composition.
⩥ What are indicators of a chemical change? Answer: Observations such
as what you see( color change, precipitant (solids in solutions)
Hear-boom Smell Taste-sour/sweet Feel-hot or cold.
Also, bubbles indicate gas..
⩥ What is the law of conservation of mass? Answer: Mass is not created
nor destroyed.
⩥ What is a chemical formula? Answer: -chemical symbols represent
molecules with subscripts to represent the number of that element.
