In a lab group you combined vinegar and baking soda and observed the results shown in the picture. Choose ALL of the evidence that supports that a chemical change has occurred. Select all that apply. There is no partial credit awarded for this answer.

Answer 1

To determine if a chemical change has occurred during the reaction of vinegar and baking soda, consider the following evidence that suggests a chemical change:

1. Formation of gas: If you observed bubbling or fizzing during the reaction, this indicates the production of carbon dioxide gas, a sign of a chemical change.

2. Change in temperature: If the reaction produced heat or if the mixture felt cold to the touch, this suggests that an energy change occurred, which is characteristic of a chemical reaction.

3. Formation of a precipitate: If any solid material formed and settled at the bottom of the container, this indicates that a new substance was created, which is a sign of a chemical change.

4. Color change: If there was any noticeable change in color of the solution, this indicates that new substances with different properties are formed, which points to a chemical change.

5. Change in odor: If a new smell was detected after the reaction, it indicates the formation of new substances, signaling a chemical change.

Choose all of the above points that apply based on your observations. If you're able to confirm any of these factors, they collectively support the occurrence of a chemical change.