BIOS 135 Week 3 Quiz (Latest Version) Questions with Answers: DeVry University, Chicago
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Course
BIOS 135
Institution
BIOS 135
Question 1
2 / 2 pts
(CO 3) Which of the statements listed below is true according to Bronsted-Lowry definitions?
An acid is a proton acceptor.
A base produces H+ ions in aqueous solutions.
A base is a proton donor.
Correct!
A base is a proton acceptor.
An acid acts...
Question 1
pts
(CO 3) Which of the statements listed below is true according to Bronsted-Lowry definitions?
An acid is a proton acceptor.
A base produces H+ ions in aqueous solutions.
A base is a proton donor.
Correct!
A base is a proton acceptor.
An acid acts as the solvent.
See Chapter 7. The Brønsted-Lowry theory describes acid-base
interactions in terms of proton transfer between chemical species.
According to this theory, an acid is any species that can donate a
proton (H+), and a base is any species that can accept a proton. So,
an "acid" must contain a hydrogen that can dissociate as H +, and
a base must have at least one lone pair of electrons to form a new
bond with a proton.
Question 2
pts
(CO 3) Ammonia (NH3) accepts a proton from water. Which of the statements listed below is true
according to Bronsted-Lowry definitions?
Correct!
Ammonia is a base.
Ammonia is an acid.
Ammonia produces H+ ions in aqueous solutions.
, Ammonia acts as a solvent.
Ammonia is neutral.
See Chapter 7. The Brønsted-Lowry theory describes acid-base
interactions in terms of proton transfer between chemical species.
According to this theory, an acid is any species that can donate a
proton (H+), and a base is any species that can accept a proton. So,
an "acid" must contain a hydrogen that can dissociate as H +, and
a base must have at least one lone pair of electrons to form a new
bond with a proton.
Question 3
pts
(CO 3) An unknown solution has a pH of 1. This solution is _____.
Correct!
extremely acidic
moderately acidic
neutral
slightly basic
extremely basic
See Chapter 7. The pH is a measure of the hydrogen ion
concentration ([H+]) in a solution. The scale ranges from 1 - 14, with
pH 7 being "neutral". Any number above 7 means the solution is basic
or alkaline, and the higher the number, the greater the degree of
alkalinity (so pH 8 is lightly alkaline while pH 14 is extremely alkaline).
Likewise, acidity decreases as the number becomes smaller. So pH 6
is slightly acidic while pH 1 is extremely acidic).
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