IQWST IC2 Lessons 6-12 Review

A chemical reaction occurs when Kelly combines carbon dioxide (CO2) and water (H2O) together.

CO2 + H2O → H2CO3 ?

What is the product of the reaction?

• H2O2 + CO2

• H2CO3

• H3CO2

• H2O + CO2

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What best explains why electrolysis is a chemical reaction?

• Electrolysis is a chemical reaction because it makes two new substances identical to water.

• Electrolysis rearranges the atoms of water into two new substances with different properties than water.

• Electrolysis boils water until the water vapor turns into new susbtances.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

True or false: Electrolysis is a CHEMICAL reaction

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A chemical reaction occurs when Kelly puts carbon dioxide (CO2) and water (H2O) together.

H2O + CO2 → H2CO3 ?

What are the reactants?

• H2O2 + CO2

• H2CO3

• H3CO2

• H2O + CO2

Tags

NGSS.MS-PS1-1

What could be considered EVIDENCE of a chemical reaction? CHOOSE ALL THAT APPLY

• Formation of bubbles

• Change in color

• Production of gas

• Temperature change

Tags

NGSS.MS-PS1-2

The substances at the beginning of a chemical equation are called the ____

• product
• yield
• chemical symbol
• reactants

Tags

NGSS.MS-PS1-5

What is the arrow in a chemical equation...

H_{2 +} O --> H₂O

• Reactants

• Products

• Yields/Forms/Produces

• Chemical Equation

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

Tags

NGSS.MS-PS1-5

Coal contains carbon and other elements. Carbon dioxide forms when coal burns in the presence of oxygen. Which of these is the best evidence that a chemical reaction occurs when coal burns?

• The shape of the coal changes
• Oxygen is present
• A new substance is produced
• Coal is made up of more than one element

Tags

NGSS.MS-PS1-2

What are Chemical Reactions?

• It's when you mix substances.

• a process in which atoms rearrange to form new substances

• bubbles

• letter and numbers showing the types and number of atoms

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5