Ionic Conductance and Mobility Concepts

Ionic Conductance and Mobility Concepts

Assessment

Interactive Video

Chemistry, Physics, Science

11th - 12th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains ionic mobility, highlighting that smaller ions like lithium and sodium have lower mobility due to solvation. Despite being small and highly hydrated, H+ ions exhibit high mobility due to rapid proton transfer between water molecules. Similarly, OH- ions also show high mobility through proton exchange. The influence of temperature on ionic conductivity is discussed, with a focus on Walden's rule, which states that ionic conductance and viscosity are inversely related.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is ionic mobility?

The speed of an ion moving under a unit potential gradient

The ability of an ion to dissolve in water

The charge of an ion in a solution

The size of an ion in a crystal lattice

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which ion is known for having very high ionic mobility?

H+

Li+

Na+

K+

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why do smaller ions like lithium and sodium have lower ionic mobility?

They are less charged

They are less reactive

They are highly solvated, increasing their effective size

They have a higher charge density

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary reason for the high mobility of H+ ions in water?

Their high charge

The rapid transfer of protons through hydrogen bonds

Their small size

Their low solvation

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How does the structure of ice affect the mobility of protons compared to water?

Protons move slower in ice due to its rigid structure

Protons dissolve in ice

Protons move faster in ice because they can jump between fixed positions

Protons are immobilized in ice

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What mechanism explains the high mobility of OH- ions in water?

Direct movement through the solution

Exchange of protons between water and OH- ions

Reduction of OH- ions

Increase in temperature

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to Walden's rule, what is the relationship between ionic conductance and viscosity?

They are equal

They are unrelated

They are inversely proportional

They are directly proportional

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