Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 2: Q5P (page 54)

a)Which is a stronger acid: one with a pKa of 5.2 or one with a pKa of 5.8?

b. Which is a stronger acid: one with an acid dissociation constant of 3.4 ×10-3 or one with an acid dissociation constant of 2.1×10-4?

Short Answer

Expert verified

a.One with pKa value 5.2 is stronger acid

b. One with Acid dissociation constant 3.4 ×10-3 is stronger acid.

Step by step solution

01

Definition pKa

pKa if given as the negative logarithmic value of acid dissociation constant (Ka). It is given as,

pKa= -log(Ka)

The more is the acid dissociation constant or the acidity of a compound, the less will be the pKa value.

02

a. Acidic values according to pKa

The more is the pKa value, the lesser will be the acidity. So for

a. One with pKa of 5.2 is more acidic than the one with pKa =5.8

03

b. Acidic values according to pKa

The more is the acid dissociation constant, the more will be the acidic character of a compound. so for

b. One with acid dissociation constant (Ka) of3.4 ×10-3 is more acidic than the Ka of 2.1×10-4.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Rank the ions (-CH3, -NH2, HO-, and F-) from most basic to least basic.

Draw the products of the following acid–base reactions:

a. CH3NH3++H2O

b. HBr +CH3OH

c. CH3NH3++ OH-

d.CH3NH2+ CH3OH

Estimate the pKa values of the following compounds.

(a)CH3CH2CH2NH2

(b)CH3CH2CH2OH

(c)CH3CH2COOH

(d)CH3CH2CH2NH3+

Citrus fruits are rich in citric acid, a compound with three COOH groups. Explain the following:

a. The first pKa (for the COOH group in the center of the molecule) is lower than the pKa of acetic acid.

b. The third pKa is greater than the pKa of acetic acid.

Question:Draw the products of the acid–base reaction when

a. HCl is the acid and NH3 is the base.

b. H2O is the acid and -NH2 is the base.
See all solutions

Recommended explanations on Chemistry Textbooks

Physical Chemistry

Read Explanation

Inorganic Chemistry

Read Explanation

Chemistry Branches

Read Explanation

The Earths Atmosphere

Read Explanation

Organic Chemistry

Read Explanation

Making Measurements

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free