Chemical Reactions and Their Effects

Answer TRUE or FALSE: Acids like vinegar and lemon juice are common in chemical reactions?

• TRUE

• FALSE

• SOMETIMES

• RARELY

What is the purpose of vinegar in cleaning pennies?

• Vinegar helps remove the dull outer layer of a penny.

• Vinegar adds shine to the penny without cleaning it.

• Vinegar makes the penny heavier for better circulation.

• Vinegar changes the color of the penny permanently.

What gas formed in the vinegar and baking soda mixture?

• Oxygen

• Nitrogen

• Carbon dioxide

• Hydrogen

Chemical reactions can cause

• a change in color, fizzing/bubbling, or a change in form (liquids become solid)

• an increase in temperature without any other changes

• the formation of new elements

• the release of energy without any visible changes

What happened to the steel nail after we let it soak in our vinegar and salt mixture?

• The steel nail became covered in a layer of copper when put into the vinegar and salt mixture.

• The steel nail rusted and turned completely black.

• The steel nail dissolved completely in the mixture.

• The steel nail became magnetic after soaking in the mixture.

List some examples of acids.

• Vinegar, lemon juice, and sulfuric acid

• Baking soda, salt, and sugar

• Water, milk, and coffee

• Olive oil, butter, and cream

Chemical Reactions

• Create a new substance, like when latex and acid combine to create rubber.

• Break down substances into simpler components.

• Change the physical state of a substance without altering its chemical composition.

• Mix two substances without any chemical change.

What happened to the weight of the steel nail after coating it in copper?

• The steel nail weighed less after it was coated with copper.

• The weight of the steel nail remained the same after coating it in copper.

• The steel nail weighed more after it was coated with copper.

• The steel nail became lighter after being coated with copper.

Examples of chemical reactions:

• Rubber

• Silly putty

• Fireworks

• All of the above

What was the alchemist' goal with metals?

• To create a potion that turned metal to gold.

• To discover the secret of eternal life.

• To transform lead into silver.

• To find a way to communicate with spirits.