Unit 7- Matter and its Changes

Front

What is a chemical property?

Back

A characteristic of a substance that can only be observed during a chemical reaction, such as reactivity with acid.

Front

What is a physical property?

Back

A characteristic of a substance that can be observed or measured without changing the substance's chemical identity, such as density.

Front

How can density be used to identify substances?

Back

Density is a physical property that is unique to each substance and does not depend on the size of the sample, making it useful for identification.

Front

What is the definition of a solvent?

Back

A solvent is the liquid in which a solute is dissolved to form a solution.

Front

What does it mean for a substance to be soluble?

Back

A substance is soluble if it can dissolve in water.

Front

What is the formula for calculating density?

Back

Density = mass/volume.

Front

What is the significance of the density value of 5.7 g/cm³?

Back

This value can help identify substances, as it corresponds to specific materials, such as tin.

Front

What is the difference between a solute and a solvent?

Back

A solute is the substance that is dissolved, while a solvent is the substance that does the dissolving.

Front

What are some examples of physical properties?

Back

Examples include color, odor, melting point, boiling point, and density.

Front

What are some examples of chemical properties?

Back

Examples include flammability, reactivity with acid, and the ability to rust.