CHEM 120 WEEKLY QUIZZES VERSION 1 QUIZ
BANK EXAM SCRIPT 2026 COMPLETE
QUESTIONS SOLUTIONS APPROVED A+
◉ How is the pH of a solution related to the H3O+?. Answer: H30+ is
the negative log of the hydrogen ion concentration. As in increases it
makes the pH more acidic, less basic
◉ Using the equation of Kw, explain how OH- changes when more
H3O+ is added. Answer: Kw is the ion constant product of water. The
product of OH- and H3O+ influence Kw. Increasing H3O+ would
change Kw by making it more acidic
◉ What is a buffer?. Answer: A buffer neutralizes acids and bases.
◉ ***know how to find pH using log
finding value of missing by anti log. Answer: Kw= [H3O+][OH-]= [1.0
x 10^-7][1.0 x 10^-7]= 1.0 x 10^-14
see phone photos
◉ Why would adding sodium bicarbonate raise the pH of a blood pH
of 7.3. Answer: Adding sodium hydrogen bicarbonate would raise
, the pH because it is basic. By adding a base to an acid, it neutralizes
the solution
◉ What changes in color occur when bromine reacts with an
alkene?. Answer: The dark red color disappears, knowing the
solution is in an unsaturated state
◉ What changes in color take place when KMnO4 reacts with an
alkene?. Answer: The purple color of KMnO2 turns into a muddy
brown of MnO2
◉ Why is the reaction of ethene with bromine called an addition
reaction?. Answer: By adding bromine, one can see the reaction it
has. The faster the disappearance of color, decides whether the test
is positive or negative
◉ If you used a bromine test to distinguish between hexane and 2-
hexene, in which would the red color of the bromine persist?.
Answer: Hexane would persist because it is saturated. 2-hexene
would have the red disappear because it is unsaturated
◉ If you used a permanganate test to distinguish between hexane
and 1-hexene, in which would the color purple of KMnO4 persist?.
Answer: Hexane would persist because it is unsaturated, while 1-
hexene is unsaturated
BANK EXAM SCRIPT 2026 COMPLETE
QUESTIONS SOLUTIONS APPROVED A+
◉ How is the pH of a solution related to the H3O+?. Answer: H30+ is
the negative log of the hydrogen ion concentration. As in increases it
makes the pH more acidic, less basic
◉ Using the equation of Kw, explain how OH- changes when more
H3O+ is added. Answer: Kw is the ion constant product of water. The
product of OH- and H3O+ influence Kw. Increasing H3O+ would
change Kw by making it more acidic
◉ What is a buffer?. Answer: A buffer neutralizes acids and bases.
◉ ***know how to find pH using log
finding value of missing by anti log. Answer: Kw= [H3O+][OH-]= [1.0
x 10^-7][1.0 x 10^-7]= 1.0 x 10^-14
see phone photos
◉ Why would adding sodium bicarbonate raise the pH of a blood pH
of 7.3. Answer: Adding sodium hydrogen bicarbonate would raise
, the pH because it is basic. By adding a base to an acid, it neutralizes
the solution
◉ What changes in color occur when bromine reacts with an
alkene?. Answer: The dark red color disappears, knowing the
solution is in an unsaturated state
◉ What changes in color take place when KMnO4 reacts with an
alkene?. Answer: The purple color of KMnO2 turns into a muddy
brown of MnO2
◉ Why is the reaction of ethene with bromine called an addition
reaction?. Answer: By adding bromine, one can see the reaction it
has. The faster the disappearance of color, decides whether the test
is positive or negative
◉ If you used a bromine test to distinguish between hexane and 2-
hexene, in which would the red color of the bromine persist?.
Answer: Hexane would persist because it is saturated. 2-hexene
would have the red disappear because it is unsaturated
◉ If you used a permanganate test to distinguish between hexane
and 1-hexene, in which would the color purple of KMnO4 persist?.
Answer: Hexane would persist because it is unsaturated, while 1-
hexene is unsaturated
