write a description of how you know a chemical reaction is occurring.
write a description of how you know a chemical reaction is occurring.
Answer
Brief Explanations:
There are several observable signs. Formation of a precipitate (solid from solution), evolution of gas (bubbles), color - change indicating new substances, temperature change (exothermic or endothermic), and change in odor can all signal a chemical reaction.
Answer:
Observable signs include formation of a precipitate, evolution of gas, color - change, temperature change, and change in odor.