Evidence of a Chemical Reaction - Equations

Which compound is formed as a precipitate in this reaction?

• Pb(NO₃)₂

• KI

• PbI₂

• KNO₃

Tags

NGSS.MS-PS1-2

Which of the following equations demonstrates an actual chemical reaction that forms a new substance?

• A
• B
• C
• D

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Look at the picture of the equation provided. Which of the following indicate that a chemical reaction may be present?

• Precipitate formation

• Gas evolution

• Color change

• Changes in energy to system

Look at the picture of the equation provided. Which of the following indicates that a chemical reaction may be present? (CHECK STATES OF MATTER)

• Gas evolution

• Water production

• Precipitate formation

• Changes in energy to system

Look at the picture of the equation provided. Which of the following indicate that a chemical reaction may be present (CHECK ALL THAT APPLY)?

• Precipitate formation

• Gas evolution

• Water production

• Changes in energy to system

In the reaction below, what evidence of chemical change do you see?

• Precipitate formation

• Gas evolution

• Color change

• Water production

In the reaction provided, what evidence of chemical change do you see?

• Gas evolution

• Precipitate formation

• Color change

• Change in energy

In the example provided, what evidence of a chemical change do you see?

• Color change

• Precipitate formation

• Water production

• Gas evolution

According to the equation provided, which of the following is evidence that a chemical change has occurred?

• Color change

• Precipitate formation

• Change in energy

• Gas evolution

Look at the picture of the equations provided. Which of the following indicate that a chemical reaction may be present?

• Water production

• Color change

• Gas evolution

• Changes in energy to system