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Acid-Base Strength and PKA Concepts

Acid-Base Strength and PKA Concepts

Assessment

Interactive Video

Chemistry

11th - 12th Grade

Practice Problem

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains the concept of PKA and its relationship with the strength of acids, particularly organic acids. It covers the acid dissociation constant (Ka) and how it relates to PKA, emphasizing their inverse relationship. The tutorial uses tables to illustrate how lower PKA values indicate stronger acids, with HCL as an example. It also discusses the concept of conjugate bases and their inverse proportionality to acid strength. Finally, the video addresses which bases are strong enough to deprotonate water, using PKA values as a guide.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a higher Ka value indicate about an acid?

The acid is stronger.

The acid is weaker.

The acid is basic.

The acid is neutral.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How are Ka and PKA related?

They are inversely proportional.

They are equal.

They are unrelated.

They are directly proportional.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which acid is the strongest based on PKA values?

Water

Ammonia

HCl

Methane

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens to the conjugate base strength as acid strength increases?

It becomes neutral.

It increases.

It decreases.

It remains the same.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the PKA value of a strong acid like HCl?

14

-7

7

0

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of deprotonating H2O?

H+

H2O2

OH-

O2-

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which base can deprotonate water?

Any base

A base equal to OH-

A base stronger than OH-

A base weaker than OH-

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