A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassium iodide to a clear solution of lead(II)iodide. Then a yellow swirling solid formed in the liquid.

What is most likely true about the yellow solid?
It is solid lead iodide.
It is solid potassium iodide.
It was secretly added to the test tube by the scientist.
It is a new substance with different properties.
https://media.studyisland.com/pics/160703precipitatepbI2.png

Question

A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassium iodide to a clear solution of lead(II)iodide. Then a yellow swirling solid formed in the liquid.

What is most likely true about the yellow solid?
It is solid lead iodide.
It is solid potassium iodide.
It was secretly added to the test tube by the scientist.
It is a new substance with different properties.
https://media.studyisland.com/pics/160703precipitatepbI2.png

anonymous · Answer

If there is a color change the reaction is chemical and you have a new substance with different properties.