Answered

When potassium iodide liquid is poured into lead nitrate solution (both clear solutions), a yellow solid, lead iodide, forms in a potassium nitrate solution.



What are the signs that this is a chemical reaction? Choose two correct answers.


  • Bubbles appear.
  • Heat is produced.
  • Heat is absorbed.
  • Light is produced.
  • A precipitate forms.
  • The color changes.

Verified Answer :

Final answer:

The signs of a chemical reaction when potassium iodide and lead nitrate are combined include the formation of a precipitate and a change in color. Lead iodide forms as a yellow solid, marking these changes clearly. These indicators help in recognizing that a chemical reaction has occurred.


Explanation:

Signs of a Chemical Reaction

When potassium iodide liquid is poured into lead nitrate solution, a notable chemical reaction occurs that results in the formation of lead iodide, a yellow solid, within a potassium nitrate solution. Identifying signs of this reaction is crucial in understanding the nature of chemical changes. Here are two correct signs that indicate a chemical reaction has taken place:

  1. A precipitate forms. In this case, lead iodide precipitates out of the solution, giving a visual indication of a chemical change.
  2. The color changes. The clear solutions of potassium iodide and lead nitrate turn into a yellow color due to the formation of lead iodide.

While other signs like bubbles, heat production, or light emission are also indicators of chemical reactions, they do not apply to this specific reaction. The formation of a precipitate and the change of color are definitive indicators in this scenario.


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https://brainly.com/question/42519824


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