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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

If one is very careful, it is possible to float a needle on the surface of water. (If the needle is magnetized, it will turn to point north and south and become a makeshift compass.) What would happen to the needle if a drop of liquid soap is added to the solution? Explain the observation.

Interpretation Introduction

Interpretation:

It is possible to float a needle on the surface of water and it has to be explain that what would happens to the needle if a drop of liquid soap is added to the solution.

Concept introduction:

Surface tension: It is an attractive force exerted upon the surface molecules of a liquid by the molecules beneath that tends to draw the surface molecules into the bulk of the liquid and makes the liquid assume the shape having the least surface area.

Soap and detergents are surfactants they reduce the surface tension of water by adsorbing at the liquid- gas interface.

Explanation

It is possible to float a needle on the surface of water. While liquid soap is added to the water, the needle will be driven to sink by the disruption of water’s surface tension.

Actually liquid soap or soap are surface acting agent and are soluble in both organic solvents and water...

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