Chemistry Review

Front

What is a chemical reaction?

Back

A process where substances (reactants) change into different substances (products), often involving energy changes.

Front

What evidence indicates a chemical reaction has occurred?

Back

Signs include gas production (bubbles), color change, temperature change, and formation of a precipitate.

Front

What happens to particles in a solid?

Back

Particles are locked in position and can only vibrate.

Front

What is density?

Back

Density is the mass of a substance divided by its volume, indicating how compact the substance is.

Front

How does temperature affect solubility?

Back

Generally, increasing temperature increases the solubility of solids in liquids.

Front

What is a saturated solution?

Back

A solution that has dissolved the maximum amount of solute at a given temperature.

Front

What is the difference between a physical change and a chemical change?

Back

A physical change alters the form of a substance without changing its identity, while a chemical change results in the formation of new substances.

Front

What is concentration in a solution?

Back

Concentration refers to the amount of solute present in a given volume of solvent.

Front

What is the role of heat in dissolving sugar in water?

Back

Heating increases the kinetic energy of water molecules, allowing them to dissolve sugar more effectively.

Front

What is rusting?

Back

Rusting is a chemical reaction where iron reacts with oxygen and moisture to form iron oxide (rust).