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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

Which pairs of liquids will be miscible?

  1. (a) H2O and CH3CH2CH2CH3
  2. (b) C6H6 (benzene) and CCl4
  3. (c) H2O and CH3CO2H

Interpretation Introduction

Interpretation: The pair of liquids which are miscible have to be identified.

Concept introduction:

Miscible: If two liquids can be mixed in any proportion to form a homogeneous mixture they are said to be miscible.

Immiscible: The two liquids do not fully mix in all proportion; they exist in contact with each other as separate layers.

Like dissolves like rule refers to solubility. Polar solutes can dissolve in polar solvents and non-polar solutes can dissolve in non-polar solvents.

Explanation

Reason for correct answers:

C6H6andCCl4

Benzene and carbon tetrachloride are non-polar molecules; two compounds are miscible, as per the rule ‘like dissolves like’. Hence, the pair will be miscible.

H2OandCH3CO2H

Water and Ethanoic acid are polar molecules; two compounds are miscible through hydrogen - bonding, as per the rule ‘like dissolves like’

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