Balancing Chemical Equations Challenge

Why is it important to balance chemical equations?

• To make the equations easier to read

• To create new atoms

• To comply with the law of conservation of mass

• To ensure the reaction looks neat

Tags

NGSS.MS-PS1-5

What does the law of conservation of mass state?

• Atoms can be created or destroyed

• Mass can change forms but cannot be created or destroyed

• Mass is irrelevant in chemical reactions

• Mass can be created or destroyed

Tags

NGSS.MS-PS1-5

What should you not change when balancing chemical equations?

• Coefficients

• Subscripts

• Reactants

• Products

What is the first step in balancing a chemical equation?

• Change the subscripts

• Write the equation for the reaction

• Remove elements

• Add new elements

In the example with iron and chlorine, what was the initial imbalance?

• Iron atoms

• Chlorine atoms

• Neither iron nor chlorine atoms

• Both iron and chlorine atoms

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When balancing equations, what should you do if you get stuck?

• Ignore the imbalance

• Give up

• Change the subscripts

• Seek help or move to another problem

What should you do if the coefficients in a balanced equation can be reduced?

• Leave them as they are

• Reduce them to the lowest possible whole number ratio

• Increase them

• Change the subscripts

What is a sign of a chemical reaction involving light?

• Change in color

• No change in light

• Absorption of light

• Release of light

Tags

NGSS.MS-PS4-2

What indicates a chemical reaction if you notice a temperature change?

• No change in temperature

• Release or absorption of heat

• Change in color

• Formation of a solid

Tags

NGSS.MS-PS1-4

What does the sudden appearance of a solid in a reaction indicate?

• Release of gas

• No reaction

• Formation of a precipitate

• Change in temperature

Tags

NGSS.MS-PS1-2