Sage-Tips

Why do water molecules have a weak attraction?

Opposite charges attract one another. The slight positive charges on the hydrogen atoms in a water molecule attract the slight negative charges on the oxygen atoms of other water molecules. This tiny force of attraction is called a hydrogen bond. This bond is very weak.

Why Surfactants lower the surface tension?

The reason for the reduction in the surface tension when surfactant molecules adsorb at the water surface is that the surfactant molecules replace some of the water molecules in the surface and the forces of attraction between surfactant and water molecules are less than those between two water molecules, hence the …

Is the attraction between two things like attraction between one molecule of water and another molecule of water?

Cohesion: Hydrogen Bonds Make Water Sticky In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

What is the weak attraction between water molecules called?

Hydrogen Bonds This attraction between two water molecules is an example of a hydrogen bond —a weak chemical attraction between polar molecules. • Water molecules are attracted to each other by hydrogen bonds.

What type of weak bond occurs when atoms and molecules are temporarily attracted to each other by virtue of their proximity and charge?

Like hydrogen bonds, van der Waals interactions are weak attractions or interactions between molecules. They are also called inter-molecular forces. They occur between polar, covalently bound atoms in different molecules.

Is the bonding between the atoms of molecules is strong or weak Why?

	Bond Strength	Description
Covalent	Strong	Two atoms share electrons.
Ionic	Moderate	Oppositely charged ions are attracted to each other.
Hydrogen	Weak	Forms between oppositely charges portions of covalently bonded hydrogen atoms.

Do surfactants lower surface energy?

Adding a surfactant to a coating or detergent lowers the surface tension of the liquid so it will flow more, covering the entirety of the surface.

How does the surfactant reduce the surface tension of water in the lungs quizlet?

Surfactant reduces the surface tension exerted on the alveolus. It works by opposing the intermolecular attractive forces between the liquid molecules that line the alveoli.

Why is adhesion important in water?

For instance, adhesion enables water to “climb” upwards through thin glass tubes (called capillary tubes) placed in a beaker of water. The water molecules are more strongly attracted to the glass than they are to other water molecules (because glass molecules are even more polar than water molecules).

Why are water molecules attracted with both cations and anions?

Hydrogen bonds explain many of the properties of water. The small positive charges on hydrogen atoms in water molecules attract the anions (Cl-), and the small negative charges on the oxygen atoms attract the cations (Na+).

What type of weak bond occurs when atoms and molecules are temporarily attracted to each other?

The London dispersion force is the weakest intermolecular force. The London dispersion force is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. This force is sometimes called an induced dipole-induced dipole attraction.

Why are hydrogen bonds weaker in water?

How do Surfactants affect the surface tension of water?

The cohesive forces between the water molecules are very strong making the surface tension of water high. As surfactants absorb they break these interactions. The intermolecular forces between surfactant and water molecule are much lower than between two water molecules and thus surface tension will decrease.

What is the force of attraction between two water molecules called?

This tiny force of attraction is called a hydrogen bond. This bond is very weak. Hydrogen bonds are formed easily when two water molecules come close together, but are easily broken when the water molecules move apart again. They are only a small fraction of the strength of a covalent bond, but,…

Why do water molecules stick to one another?

A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen. Atoms of oxygen are electronegative and attract the shared electrons in their covalent bonds. But, because of the hydrogen bonds, as water molecules come together they stick to one another for a small, but significant amount of time.

What happens when the surfactant concentration is high?

When the surfactant concentration is high, they form micelles. The point at which micelles are formed is called critical micelle concentration. The main purpose of the surfactants is to decrease the surface and interfacial tension and stabilize the interface.