Chemical Reactions

Which of the following is an example of a CHEMICAL change?

• Shattering a window with a baseball

• Ripping paper into 1,000,000,000 tiny pieces

• Rusting an iron bar on a humid day

• Melting a block of copper metal

Tags

NGSS.HS-PS1-2

Which of the following is an example of a PHYSICAL change?

• Neutralizing vinegar with baking soda

• Breaking your iPad with a rock due to school stress

• Creating a precipitate by mixing Lead Nitrate and Sodium Iodide

• Burning popcorn in the microwave

Which of the following describes the basic structure of single replacement reactions?

• A + B --> C

• A + B --> AB

• A + BC --> AC + B

• AB + CD --> AD + CB

What are the products of ALL combustion reactions?

• Carbon Dioxide and Water

• Smoke and Ash

• Fire and Carbon Dioxide

• Water and Ash

Tags

NGSS.HS-PS1-2

What type of reaction is this?

2NaHCO₃ --> Na₂CO₃ + H₂O + CO₂

• Single Replacement

• Combustion

• Decomposition

• Synthesis

Tags

NGSS.HS-PS1-2

What type of reaction is this?

2Na + 2H₂O --> 2NaOH + H₂

• Single Replacement

• Double Replacement

• Synthesis

• Decomposition

Tags

NGSS.HS-PS1-2

What does the symbol (aq) stand for?

• Aquatic

• Aqueous

• Aqua

• Aquarium

Tags

NGSS.HS-PS1-2

What does the symbol Δ represent?

• Change in heat

• Change in shape

• Change in color

• Change in attitude

Use the activity series, seen in the image, to determine if the reaction will occur.

Ca + Fe₂S₃ --> ?

• Yes, the reaction will occur

• No, the reaction will not occur

• Cannot be determined

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which coefficient should be placed in front of NH₃ to balance this equation?

NH₃ + H₂SO₄ --> (NH₄)₂SO₄

• 1

• 2

• 3

• 1,000,000,000