The reason for the spherical shape of oil in water is to be determined. Concept introduction: The various kinds of interactions that bind a molecule are known as intermolecular forces. These can be forces of dispersion, dipole–dipole, ion–dipole, and hydrogen bonding. Dispersion forces present in every molecule due to the presence of electron. Dipole–dipole is the attractive force between opposite end of polar molecule. Hydrogen bonding is the attractive force between hydrogen attached to an electronegative atom of one molecule and an electronegative atom of different molecule. Ion–dipole force is the attractive force that due to electrostatic attraction between an ion and a neutral molecule. The phenomenon by which a liquid tends to minimize its surface area is called surface tension. The cause for surface tension is intermolecular forces. An example of this phenomenon is a drop of water or soap bubble.

Question

A small artisanal cheesemaker is testing the acidity of their milk before it coagulates. During fermentation, bacteria produce lactic acid (K₁ = 1.4 x 104), a weak acid that helps to curdle the milk and develop flavor. The cheesemaker has measured that the developing mixture contains lactic acid at an initial concentration of 0.025 M. Your task is to calculate the pH of this mixture and determine whether it meets the required acidity for proper cheese development. To achieve the best flavor, texture and reduce/control microbial growth, the pH range needs to be between pH 4.6 and 5.0. Assumptions: Lactic acid is a monoprotic acid H H :0:0: H-C-C H :0: O-H Figure 1: Lewis Structure for Lactic Acid For simplicity, you can use the generic formula HA to represent the acid You can assume lactic acid dissociation is in water as milk is mostly water. Temperature is 25°C 1. Write the K, expression for the dissociation of lactic acid in the space provided. Do not forget to include state symbols.…

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Question

Chapter 11, Problem 118AP

Interpretation Introduction

Interpretation:

The reason for the spherical shape of oil in water is to be determined.

Concept introduction:

The various kinds of interactions that bind a molecule are known as intermolecular forces. These can be forces of dispersion, dipole–dipole, ion–dipole, and hydrogen bonding.

Dispersion forces present in every molecule due to the presence of electron.

Dipole–dipole is the attractive force between opposite end of polar molecule.

Hydrogen bonding is the attractive force between hydrogen attached to an electronegative atom of one molecule and an electronegative atom of different molecule.

Ion–dipole force is the attractive force that due to electrostatic attraction between an ion and a neutral molecule.

The phenomenon by which a liquid tends to minimize its surface area is called surface tension.

The cause for surface tension is intermolecular forces. An example of this phenomenon is a drop of water or soap bubble.

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