Question

With evidence from the text above, what are 3 different reactions that would demonstrate that a substance has undergone a chemical change?

Answer 1

[AI-generated answer — Bot GPT 3.5]

1. Production of bubbles: If the substance is reacting with another substance to produce gas bubbles, like in the case of mixing baking soda and vinegar, this demonstrates a chemical change has occurred.

2. Change in color: If the substance changes color, like when a piece of iron rusts and turns reddish-brown, this is evidence of a chemical change taking place.

3. Formation of a precipitate: If a solid substance forms in a solution, this can indicate that a chemical reaction has occurred, such as when mixing silver nitrate and sodium chloride to form silver chloride precipitate.