Chem 103 Combined set - UW Madison Exam 1 review Module 1-4 Questions with Correct Answers
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Grado
Chemistry
Institución
Chemistry
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 ...
Chem 103 Combined set - UW Madison Exam 1
review Module 1-4 Questions with 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.
,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 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.
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
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