Chemical Reactions

A process in which atoms rearrange to form new substances.

• extended structure

• boiling point

• chemical reaction

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A substance produced during a chemical reaction

• Product

• Reactant

• Properties

Tags

NGSS.MS-PS1-2

A solid formed from a solution during a chemical reaction is called a

• precipitate

• reactant

• crystal

• powder

Select all that are true about electrolysis.

• The balanced chemical equation is

  2H₂O --> 2H₂ + O₂

• The balanced chemical equation is

  2H₂ + O₂ --> 2H₂O

• Electrolysis is a chemical reaction.

• Electrolysis is NOT a chemical reaction.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Magnesium and oxygen combine to form magnesium oxide, the magnesium and oxygen are:

• products

• reactants

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following are chemical reactions?

• Mixing Gatorade powder and water

• Combustion (burning) of wood

• Boiling water

• Electrolysis

• Aluminum foil and Copper Chloride

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Looking at the model to the left, how do you know a reaction has happened?

• There are equal numbers of each element.

• New molecules have been created.

• Molecules did not change.

• The atoms were rearranged to form new molecules.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Everytime two substances are mixed together a chemical reactions occurs.

• True

• False

Tags

NGSS.MS-PS1-2

A chemical reaction must have at least two reactants.

• True

• False

Mixtures contain at least two different molecules that are not chemically combined.

• True

• False