Physical and Chemical Changes/Law of Conservation of Mass

Classify the following as being a physical or chemical change: Sodium hydroxide dissolves in water.

Classify the following as being a physical or chemical change: Hydrochloric acid reacts with potassium hydroxide to produce a salt, water and heat.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify the following as being a physical or chemical change: A pellet of sodium is sliced in two.

Classify the following as being a physical or chemical change: Water is heated and changed to steam.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Classify the following as being a physical or chemical change: Potassium chlorate decomposes to potassium chloride and oxygen gas.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify the following as being a physical or chemical change: When placed in water, a sodium pellet catches on fire as hydrogen gas is liberated and sodium hydroxide forms.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify the following as being a physical or chemical change: Evaporation.

Tags

NGSS.MS-PS1-4

Classify the following as being a physical or chemical change: Ice melting.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Classify the following as being a physical or chemical change: Milk sours.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Classify the following as being a physical or chemical change: Sugar dissolves in water.