A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassiu

Question

4 years ago

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A chemist who studies water samples did a demonstration of how to test for lead in water. She added a clear solution of potassiu

m iodide to a clear solution of lead nitrate. Then a yellow swirling solid formed in the liquid. What is most likely true about the yellow solid? A. It is a new substance with different properties. B. It is solid lead nitrate. C. It is solid potassium iodide. D. It was secretly added to the test tube by the scientist.

Chemistry

2 answers:

Vikentia [17] · Answer 1 · 2021-11-15T18:37:25+03:00

Vikentia [17]4 years ago

8 0

it's A. It is a new substance with different properties.

faust18 [17] · Answer 2 · 2021-11-15T17:36:06+03:00

Answer:

The swirling yellow solid formed is lead iodide (PbI₂).

Explanation:

The reaction of potassium iodide (KI) with lead nitrate (Pb(NO₃)₂) will produce lead iodide (PbI₂) and potassium nitrate (KNO₃) according to the equation:

2KI + Pb(NO₃)₂ → PbI₂↓ + 2KNO₃

Lead iodide (PbI₂) is a yellow swirling precipitate that is formed from the reaction.