question select all the correct answers. which of these events indicate that a chemical reaction might have…

question select all the correct answers. which of these events indicate that a chemical reaction might have occurred? silver jewelry becomes dark because of tarnish. water evaporates from salt water and leaves salt behind. a liquid bubbles when heated. a solid appears when two water - based solutions are added together.

question select all the correct answers. which of these events indicate that a chemical reaction might have occurred? silver jewelry becomes dark because of tarnish. water evaporates from salt water and leaves salt behind. a liquid bubbles when heated. a solid appears when two water - based solutions are added together.

Answer

Brief Explanations:

  • Silver jewelry darkening due to tarnish is a chemical reaction as silver reacts with sulfur - containing substances in the air to form silver sulfide.
  • Water evaporating from salt - water is a physical change (evaporation), not a chemical reaction as no new substances are formed.
  • A liquid bubbling when heated is usually a physical change (boiling), not a chemical reaction as it is just a change of state.
  • A solid appearing when two water - based solutions are added together is a chemical reaction called precipitation, where new substances are formed.

Answer:

Silver jewelry becomes dark because of tarnish., A solid appears when two water - based solutions are added together.