Log in
Chemistry
13
answers
0
watching
546
views

Select the statement that best describes a buffer.

A)A buffer prevents the pH of a solution from changing when an acid or base is added.

B) A buffer causes acidic solutions to become alkaline, and alkaline solutions to become acidic.

C) Buffer resists change in pH by accepting hydrogen ions when acids are added to the solution and donating hydrogen ions when bases are added A buffer stabilizes the pH of a solution by preventing acids or bases from dissociating.

D) Buffered solutions are always neutral, with a pH of 7.

Watch
13
answers
0
watching
546
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Nelly Stracke
Nelly StrackeLv2
14 Mar 2020
Already have an account? Log in
Share
discord banner image
Join us on Discord
Chemistry Study Group
Join now

Related textbook solutions

Basic Chemistry
5 Edition,
Timberlake
ISBN: 9780134138046
Principles of Chemistry Molecular Approach
4th Edition,
Tro
ISBN: 9780134112831
Principles of Chemistry Molecular Approach
3rd Edition, 2014
Tro
ISBN: 9780321971944
Chemistry: Structure and Properties
2nd Edition,
Tro
ISBN: 9780134293936
Chemistry: A Molecular Approach
3rd Edition,
Tro
ISBN: 9780321809247
Chemistry: A Molecular Approach
5th Edition,
Tro
ISBN: 9780134874371
Principles of Chemistry: A Molecular Approach
4th Edition,
Tro
ISBN: 9780134895741
Chemistry: The Central Science
14th Edition, 2017
Brown
ISBN: 9780134414232

Related questions

QUESTION 1

Which of the following substances is most acidic?

Cow’s milk - pH 6.6

Apple juice - pH 3.0

Tomato juice - pH 4.5

Distilled water - pH 7.0

2 points

QUESTION 2

A buffer is a substance that converts:

Alkaline solutions to neutral solutions.

Acidic solutions to alkaline solutions.

Strong bases or acids to weak bases or acids.

Acidic solutions to neutral solutions.

QUESTION 3

How does a solution of pH 7 compare to a solution of pH 10?

pH 7 has more OH- ions

pH 7 is more basic

pH 7 has a higher pH

pH 7 has more H+ ions

2 points

QUESTION 4

According to the Arrhenius Theory of acids and bases, a base is:

A substance that decrease the amount of hydroxide ions present.

A substance that increases the amount of hydroxide ions present when it is dissolved in water.

A substance that increase the amount of hydrogen ions present.

A substance that increases the amount of hydrogen ions present when it is dissolved in water.

QUESTION 5

Which of the following are true regarding acid-base titrations?

They are used to determine the concentration of an unknown acid or base.

The acid or the base must be a standard solution with a known concentration

The standard solution is titrated into the chemical with the unknown concentration.

All of the above are true regarding acid-base titrations.

2 points

QUESTION 6

Which of the following is not an example of a neutralization reaction?

HCl + NaOH NaCl +H2O

2 NaOH + H2CO3 Na2CO3 +2 H2O

H2SO4 + 2 NH4OH (NH4)2SO4 + 2 H2O

2 AgNO3 + Zn 2Ag +Zn(NO3)2

QUESTION 7

Which acid base theory defines an acid as a proton donor and a base as a proton acceptor?

Arrhenius Theory

Bronsted-Lowery Theory

Conjugate Pairs Theory

Lewis Theory

2 points

QUESTION 8

The Arrhenius Theory states that acid-base reactions create a solution composed of a water and a salt. This is because mixing an acidic and basic solution together yields:

A neutral solution

A solution with a pH at or near 7

Both A and B are correct

QUESTION 9

Which of the following correctly defines a standard solution?

A solution which always has the same molecular geometry.

A solution in which the concentration is precisely known.

A solution in which the volume is precisely known.

A solution which always has different levels of solutes and solvents.

2 points

QUESTION 10

Acids naturally present in food are generally safe to eat because they are usually:

Concentrated

Dilute

Weak

Strong

None of the above are correct

Buffers are:

a) a mixture of weak acids or bases and their salts.

b) chosen so that the desired pH is within 2 pH units of the pKa of the acid.

c) solutions that resists changes in pH, regardless of amount of acid or base added to the buffer.

d) best made by titrating the weak acid to its equivalence point.

e) measured with a pH meter that has been previously calibrated with water.

locker number starts with 1 for q4

Weekly leaderboard

Home
Homework Help 3,900,000
Chemistry 830,000
Start filling in the gaps now
Log in