Module 6 Lesson 3

Front

What is a mixture?

Back

A combination of two or more substances in which each substance retains its individual characteristics and properties.

Front

What is a solvent?

Back

A substance in which another substance is dissolved.

Front

What is a buffer?

Back

Mixtures that can react with acids or bases to keep the pH within a particular range.

Front

Who is Johannes van der Waals?

Back

A Dutch physicist known for his work on molecular attractions, specifically van der Waals forces.

Front

What are van der Waals forces?

Back

Attractions between molecules that arise from temporary dipoles.

Front

What is a hydrogen bond?

Back

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

Front

What is the difference between a mixture and a compound?

Back

A mixture is a combination of substances that retain their individual properties, while a compound is a substance formed when two or more elements chemically bond.

Front

What role do buffers play in biological systems?

Back

Buffers help maintain a stable pH in biological systems, which is crucial for proper functioning of enzymes and biochemical reactions.

Front

Can you give an example of a common solvent?

Back

Water is a common solvent, often referred to as the 'universal solvent' due to its ability to dissolve many substances.

Tags

NGSS.HS-ESS2-5

Front

What is the significance of hydrogen bonds in water?

Back

Hydrogen bonds in water contribute to its unique properties, such as high surface tension, high specific heat, and its ability to dissolve many substances.

Tags

NGSS.HS-ESS2-5