U2L3 - Lecture Presentation - Water and Its Solutions

Fill in the Blanks

Molecules that have an unequal distribution of charges are called _____ _________, meaning that they have oppositely charged regions.

Multiple Choice

A weak force of attraction between molecules that is important in biological molecules is know as...

• ionic bonds.

• covalent bonds.

• van der Waal's force.

• covalent interactions.

Multiple Select

Which best describes van der Waals forces in water?

Multiple select question.

• • attractive forces between molecules

• • cause water to form droplets

• forces between atoms that make up water molecules

Fill in the Blanks

A ________ ____ is a weak interaction involving a hydrogen atom, and a fluorine, oxygen, or nitrogen atom from a different molecule.

Multiple Choice

Which is a combination of two or more substances in which each substance retains its individual characteristics and properties?

• compound

• solvent

• mixture

• solution

Fill in the Blanks

A

is the substance that is dissolved in the solvent.

Fill in the Blanks

A mixture in which the components remain distinct is called a

mixture.

Fill in the Blanks

Over time, the particles in a

settle to the bottom.

Fill in the Blanks

A(n) ____ releases hydrogen ions when dissolved in water. A(n) ____ releases hydroxide ions when dissolved in water

Multiple Choice

What is a mixture that can react with acids or bases to keep the pH in a particular range?

• isotope

• solute

• buffer

• colloid

Fill in the Blanks

The measure of concentration of H⁺ in a solution is called

.