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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

Liquid methanol, CH3OH, is placed in a glass tube. Is the meniscus of the liquid concave or convex? Explain briefly.

Interpretation Introduction

Interpretation: Meniscus of the methanol when placed in a glass is whether concave or convex has to be identified

Concept Introduction:

Liquid can flow through narrow spaces without the assistance of, or even in opposition to, external forces. It occurs because of intermolecular forces between the liquid and surrounding solid surfaces.

Adhesive forces are attractive forces between molecules of different materials.

Cohesive forces are the intermolecular forces which cause a tendency in liquids to resist separation.

The force which leads to concave or downward-curving referred as meniscus.

Explanation

When methanol placed in a glass tube, it able to attract to the polar -OH groups present on the surface of the glass and hence a downward facing is formed

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