Chemical Reactions & Evidence of a Chemical Reactions Flashcards
1
Q
evidence of chemical reactions:
A
bubbles/gas released, color change, odor production, the release of heat, light, or sounds, formation of a precipitate, temperature change, volume change
2
Q
can chemical reactions be reversed
A
SOME chemical reactions can be reversed, but only by other chemical changes
example: you can undo tarnish on copper pennies by placing them in vinegar
