Exploring Chemical Reactions and Their Applications

What does the Greek letter delta (Δ) over the arrow in a chemical equation signify?

• The reaction is reversible

• The reaction is exothermic

• Energy is added for the reaction to occur

• The reaction is endothermic

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

What is a synthesis reaction?

• A reaction where one reactant breaks into two or more products

• A reaction where ions of two compounds exchange places

• A reaction where two or more reactants combine to form one product

• A reaction where electrons are transferred between reactants

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

In the classroom demonstration, what was observed when the battery was connected to the water with salt?

• The water froze

• The water turned blue

• The water level increased

• Bubbles formed on the thumbtacks

What type of reaction involves one reactant breaking down into two or more products?

• Single displacement reaction

• Synthesis reaction

• Decomposition reaction

• Double displacement reaction

In the single displacement reaction demonstration, what formed on the copper?

• Silver

• Zinc

• Gold

• Iron

What causes the solution to turn blue in the single displacement reaction involving copper and silver nitrate?

• Formation of oxygen gas

• Formation of nitrate ions

• Formation of silver ions

• Formation of copper 2+ ions

What is a double displacement reaction?

• A reaction where electrons are transferred between reactants

• A reaction where ions of two compounds exchange places

• A reaction where one reactant breaks into two or more products

• A reaction where two or more reactants combine to form one product

What is the main cause of acid rain?

• Deforestation

• Volcanic eruptions

• Burning of fossil fuels

• Agricultural activities

What are the typical products of a combustion reaction?

• Carbon dioxide and water

• Oxygen and hydrogen

• Nitrogen and methane

• Sulfur dioxide and water

Tags

NGSS.MS-PS1-5

Which type of reaction involves carbon and hydrogen compounds reacting with oxygen?

• Synthesis reaction

• Decomposition reaction

• Combustion reaction

• Single displacement reaction